<?xml version="1.0" encoding="UTF-8" ?>
<?xml-stylesheet type="text/xsl" href="https://communities.bentley.com/cfs-file/__key/system/syndication/rss.xsl" media="screen"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/"><channel><title>Using the Pressure Zone Manager</title><link>https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/11913/using-the-pressure-zone-manager</link><description /><dc:language>en-US</dc:language><generator>Telligent Community 12</generator><item><title>Using the Pressure Zone Manager</title><link>https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/11913/using-the-pressure-zone-manager</link><pubDate>Mon, 15 May 2023 14:32:44 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:ae0982c4-6ddf-4d39-9dd7-60fdd1c081b8</guid><dc:creator>Jesse Dringoli</dc:creator><comments>https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/11913/using-the-pressure-zone-manager#comments</comments><description>Current Revision posted to OpenFlows | Water Infrastructure Wiki by Jesse Dringoli on 5/15/2023 2:32:44 PM&lt;br /&gt;
&lt;table style="background-color:#dce5f0;border:0px solid #dce5f0;" align="left" border="0"&gt;
&lt;tbody&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;b&gt;&amp;nbsp;&lt;/b&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;span style="font-size:medium;"&gt;&lt;b&gt;Applies To&amp;nbsp;&lt;/b&gt;&lt;/span&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Product(s):&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;WaterGEMS, WaterCAD&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Version(s):&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;CONNECT Edition, V8i&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Area:&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Modeling&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/tbody&gt;
&lt;/table&gt;
&lt;h1&gt;Background&lt;/h1&gt;
&lt;p&gt;&lt;strong&gt;Please&amp;nbsp;see the video at the bottom for a quick demonstration.&lt;/strong&gt;&lt;/p&gt;
&lt;p&gt;The Pressure Zone Manager automatically identifies pressure zones or district meter areas (DMA) in your model and can assign appropriate labels to the &amp;quot;Zone&amp;quot; property. This could be current pressure zones or in the identification and planning of future pressure zones you may want to create in a system.&lt;/p&gt;
&lt;p&gt;Note: While both pressure zones and DMAs can be identified in the pressure zone manager, for simplicity we will use the term &amp;quot;pressure zone&amp;quot; to represent these, even though not all DMAs are pressure zones and vice versa.&lt;/p&gt;
&lt;h2&gt;Initial Configuration&lt;/h2&gt;
&lt;p&gt;Pressure zones are typically identified based on the location of pumps and valves in a system. However, it is also possible to define a pressure zone based on a pipe that is closed or that has a check valve on it. To see the different elements that can be used to define pressure zones, open the Pressure Zone manager by going to Analysis &amp;gt; Pressure Zones. Select the Options tab to see the elements and available element settings.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz1.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/729x333/__key/communityserver-wikis-components-files/00-00-00-00-32/pz1.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The screenshot above shows the default settings for the different elements. Since most valves and pumps are often used to define pressure zone boundaries, these are usually set to &amp;quot;Always Use&amp;quot;. You can also specify that general purpose valves (GPV), pipes and other elements define pressure zone boundaries. Note that while you can use pipes to define a boundary, the use of isolation valves associated with the pipe may be a better workflow, but the usage will be up to your engineering judgment.&lt;/p&gt;
&lt;p&gt;The Status Defaults will define all elements of a given type. However, if you have an individual element that will operate differently from the others of the same type, you can include an element override. Click the &amp;quot;Select from Drawing&amp;quot; button in the Element Override section of the Options tab and select the individual element. You can then change the &amp;quot;Use in Pressure Zone Trace&amp;quot; column to the setting you want to use.&lt;/p&gt;
&lt;p&gt;If you have a system that does not yet include valves or pumps and you want to see where the high and low pressures of your system are located, compute your model and then color code the pressure results to identify areas of high and low pressure. If you have an area of high pressure, you may want to add a PRV to reduce the pressure. If you have an area of low pressure, you may want to include a pump to add head to this part of the system.&lt;/p&gt;
&lt;p&gt;After you have added your elements or if you already have pumps and valves in a model, you can create a new pressure zone study by clicking the New button in the upper left of the manager. When you do this, you will need to choose a representative scenario for the study.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz2.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/401x324/__key/communityserver-wikis-components-files/00-00-00-00-32/pz2.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The name of the new study will be the name of the representative scenario. Highlight the new pressure zone study. In the Zone Scope tab, you define the scope of the pressure zone study. The default is to use the entire network, you can also use a subset of the network by choose that option from the Scope Type pulldown menu.&lt;/p&gt;
&lt;h2&gt;Zone Representative Elements&lt;/h2&gt;
&lt;p&gt;You can now run the pressure zone identification part of the Pressure Zone manager. However, if you want to associate pressure zones identified with Zones in the Zone Manager, the bottom of the right pane is the place to make that association. Each Zone is associated with a Representative Element - that is, an element that you are certain will be in the pressure zone associated with the Zone. This way, after the pressure zones are calculated, you can easily export them to the model and follow the naming scheme used in your list of pressure zones. For example if you identify element J-1 as being in zone &amp;quot;A&amp;quot; and you make that association here, when you calculate pressure zones and choose to export, it will assign zone &amp;quot;A&amp;quot; to J-1 AND other nodes in the same calculated pressure zone as J-1.&lt;/p&gt;
&lt;p&gt;For more on this, see&amp;nbsp;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/32704.automatically-assign-the-zone-property-based-on-calculated-pressure-zones"&gt;Automatically assign the Zone property based on calculated pressure zones&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz3.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/740x344/__key/communityserver-wikis-components-files/00-00-00-00-32/pz3.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;h2&gt;Computing and Viewing Pressure Zone Results&lt;/h2&gt;
&lt;p&gt;To identify pressure zones in your system, click the Compute button in the upper left of the Pressure Zone manager, then select the Zone Results tab. This will show the pressure zones present in the system, including the elements in the pressure zone, the length of pipes, and boundary nodes (i.e., the elements separating the different zones). It also includes a color column, which can be used to visually represent the pressure zones in the drawing.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz4.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/748x278/__key/communityserver-wikis-components-files/00-00-00-00-32/pz4.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;To see the color coding, click the &amp;quot;Highlight Pressure Zones&amp;quot; button, then move or minimize the Pressure Zone manager (Note: do not close the Pressure Zone manager as the color coding is only active when the Pressure Zone manager is open).&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz5.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/700x454/__key/communityserver-wikis-components-files/00-00-00-00-32/pz5.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The screenshot above shows the three pressure zones in a example model. The green zone is upstream of a pump station in the upper left of the system. The second in blue is a pressure zone downstream of a few PRVs. The section in red is between the pumps and the PRVs. If the PRVs represented not a single pressure zone, as in this modeling case, but three different pressure zones, you can add isolation valves at boundaries for the pressure zones. When you re-compute the model and the pressure zone study, the pressure zones will then be further defined.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz6.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/684x381/__key/communityserver-wikis-components-files/00-00-00-00-32/pz6.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;strong&gt;Note:&amp;nbsp;&lt;/strong&gt;The example model may be a good candidate for the use of a smaller scope than the entire network. The small pressure zone in the upper left is only the elements between the reservoir and the pumps. One could define a different scope that does not include the elements upstream of the pump and these would not be&amp;nbsp;used in the pressure zone study.&lt;/p&gt;
&lt;p&gt;In addition to visually identifying the pressure zones in the system, you can also generate a report with the data, export the pressure zones to the Zones manager, and zoom to individual pressure zones.&lt;/p&gt;
&lt;h2&gt;Creating Selection Sets Based on Zone&lt;/h2&gt;
&lt;p&gt;After zones have been established in the Pressure Zone Manager, you can choose to create selection sets containing all the elements within a particular zone. Select the zone of interest from the list, click the selection set button at the top and choose &amp;quot;Create Selection Set&amp;quot;. The new selection set will contain all elements (of any element type) within the selected zone based on the pressure zone manager results.&lt;/p&gt;
&lt;p&gt;&lt;img alt=" " border="0" src="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/CreateSelectionSet.png" /&gt;&lt;/p&gt;
&lt;h2&gt;Flow Balance Tool&lt;/h2&gt;
&lt;p&gt;Another tool available in the Pressure Zone manager is the Flow Balance tool. To see information for the current time step in an EPS model run (or to see the results in a steady state simulation), click the Flow Balance Tool button and select &amp;quot;Current time step&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz7.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/717x331/__key/communityserver-wikis-components-files/00-00-00-00-32/pz7.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;Here you will be able to see the demand in the different pressure zones as well as minimum and maximum hydraulic grades and pressures. This will allow to you&amp;nbsp;verify that the pressure results in different zones are reasonable.&lt;/p&gt;
&lt;p&gt;If you are looking at an EPS run, you can also identify the volume data for a system. After computing an EPS scenario and the pressure zone study for the EPS scenario, you can select the Flow Balance Tool and select &amp;quot;Volume&amp;quot;.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz8.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/723x442/__key/communityserver-wikis-components-files/00-00-00-00-32/pz8.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;This will show the total volume of water used in different pressure zones in the system. This can be especially useful for doing water audits or water loss studies, and identifying areas of possible leakage or pipe breaks.&lt;/p&gt;
&lt;p&gt;&lt;strong&gt;NOTE&lt;/strong&gt;: the demanded volume may not be correct if there are problems with network connectivity. For example if pumps are connected by a loop. Thoroughly check your network configuration for problems before running the Flow Balance tool. (reference #&amp;nbsp;711225).&lt;/p&gt;
&lt;h2&gt;Identifying District Metering Areas&lt;/h2&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/25763.modeling-a-district-metered-area-dma"&gt;District Metering Areas &lt;/a&gt;may not necessary be areas with changes in pressure that are represented by valves and pumps. It is possible to define an area without the use of these types of elements.&amp;nbsp;&lt;/p&gt;
&lt;p&gt;DMAs often are bounded by meters. Typically the best element to represent a meter is a general purpose valve (GPV). You can place a GPV at the beginning of a DMA you want to define. You will need to identify a head vs flow curve for the GPV, but as meters typically see some head loss through the valve, that should not be a problem. The head vs flow curve you would use would simply be the curve expected for the meter in question.&lt;/p&gt;
&lt;p&gt;If you have multiple connections to a DMA, you would need another element to define the boundary. A good choice may be a PRV with an initial status of Closed and a pressure setting such that it will open when a certain pressure threshold is reached. Under normal conditions, flow would only go through the meter represented by the GPV, but if a high demand case occurs, such as a fire flow, the PRV will open when the pressure drops in the DMA.&amp;nbsp;&lt;br /&gt;&lt;br /&gt;&lt;/p&gt;
&lt;h2&gt;Troubleshooting&lt;/h2&gt;
&lt;p&gt;&lt;strong&gt;Crash and red &amp;quot;X&amp;quot; when opening Pressure Zone Manager&lt;/strong&gt;: In version 10.04.00.108, there is a known issue that can occur when a scenario was deleted. When opening the Pressure Zone Manager, it will be blank, with a red &amp;quot;X&amp;quot; on the right side. A crash dialog will appear with details starting with what you see below:&lt;/p&gt;
&lt;p&gt;&lt;em&gt;&lt;strong&gt;System.NullReferenceException: Object reference not set to an instance of an object.&lt;/strong&gt;&lt;/em&gt;&lt;/p&gt;
&lt;p&gt;&lt;em&gt;&lt;strong&gt;at Haestad.Water.PressureZoneManager.EditorModel.PressureZoneStudyGroupSummaryTableEditorModel.GetScenarioLabelAt(Int32 position)&lt;/strong&gt;&lt;/em&gt;&lt;br /&gt;&lt;em&gt;&lt;strong&gt; at Haestad.Framework.Windows.Forms.Grid.Components.FlexGridControl.HandleGridQueryCellInfo(DataGridViewCellValueEventArgs e)&lt;/strong&gt;&lt;/em&gt;&lt;br /&gt;&lt;em&gt;&lt;strong&gt; at System.Windows.Forms.DataGridView.OnCellValueNeeded(DataGridViewCellValueEventArgs e)&lt;/strong&gt;&lt;/em&gt;&lt;br /&gt;&lt;em&gt;&lt;strong&gt;...&lt;/strong&gt;&lt;/em&gt;&lt;/p&gt;
&lt;p&gt;This is a known issue (reference #1199078) which can happen if a scenario related to a pressure zone manager study was recently deleted. To resolve this, upgrade to a newer version (when available) or contact Technical Support for a patch for version 10.04.00.108.&lt;/p&gt;
&lt;h2&gt;Quick Demonstration Video&lt;/h2&gt;
&lt;p&gt;&lt;a href="https://communities.bentley.com/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pressure-zone-manager.mp4"&gt;communities.bentley.com/.../pressure-zone-manager.mp4&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;h2&gt;Detailed Demonstration Video&lt;/h2&gt;
&lt;p&gt;&lt;a href="https://www.youtube.com/watch?v=il-ber8y9UU&amp;amp;t=14s"&gt;www.youtube.com/watch&lt;/a&gt;&lt;/p&gt;
&lt;h1&gt;See Also&lt;/h1&gt;
&lt;p&gt;&amp;quot;Using the Pressure Zone Manager&amp;quot; (Help topic)&lt;/p&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/32704.automatically-assign-the-zone-property-based-on-calculated-pressure-zones"&gt;Automatically assign the Zone property based on calculated pressure zones&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/25763.modeling-a-district-metered-area-dma"&gt;Modeling a District Metered Area (DMA)&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/20108.using-the-auto-update-isolation-valve-data-option-in-the-pressure-zone-manager"&gt;Using the Auto Update Isolation Valve Data option in the Pressure Zone Manager&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/20110/check-valve-option-not-working-in-pressure-zone-manager"&gt;Check valve option not working in pressure zone manager&lt;/a&gt;&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;

&lt;div style="font-size: 90%;"&gt;Tags: Pressure Zone Manager, calibration, reviewed2017, Flow Balance, WaterGEMS, WaterCAD, pressure zone&lt;/div&gt;
</description></item><item><title>Using the Pressure Zone Manager</title><link>https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/11913/using-the-pressure-zone-manager/revision/13</link><pubDate>Fri, 16 Sep 2022 13:31:35 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:ae0982c4-6ddf-4d39-9dd7-60fdd1c081b8</guid><dc:creator>Jesse Dringoli</dc:creator><comments>https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/11913/using-the-pressure-zone-manager#comments</comments><description>Revision 13 posted to OpenFlows | Water Infrastructure Wiki by Jesse Dringoli on 9/16/2022 1:31:35 PM&lt;br /&gt;
&lt;table style="background-color:#dce5f0;border:0px solid #dce5f0;" align="left" border="0"&gt;
&lt;tbody&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;b&gt;&amp;nbsp;&lt;/b&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;span style="font-size:medium;"&gt;&lt;b&gt;Applies To&amp;nbsp;&lt;/b&gt;&lt;/span&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Product(s):&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;WaterGEMS, WaterCAD&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Version(s):&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;V8i, CONNECT Edition&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Area:&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Modeling&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Original Author:&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Mark Pachlhofer, Bentley Technical Support Group&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/tbody&gt;
&lt;/table&gt;
&lt;h1&gt;Background&lt;/h1&gt;
&lt;p&gt;&lt;strong&gt;Please&amp;nbsp;see the video at the bottom for a quick demonstration.&lt;/strong&gt;&lt;/p&gt;
&lt;p&gt;The Pressure Zone Manager automatically identifies pressure zones or district meter areas (DMA) in your model and can assign appropriate labels to the &amp;quot;Zone&amp;quot; property. This could be current pressure zones or in the identification and planning of future pressure zones you may want to create in a system.&lt;/p&gt;
&lt;p&gt;Note: While both pressure zones and DMAs can be identified in the pressure zone manager, for simplicity we will use the term &amp;quot;pressure zone&amp;quot; to represent these, even though not all DMAs are pressure zones and vice versa.&lt;/p&gt;
&lt;h3&gt;Initial Configuration&lt;/h3&gt;
&lt;p&gt;Pressure zones are typically identified based on the location of pumps and valves in a system. However, it is also possible to define a pressure zone based on a pipe that is closed or that has a check valve on it. To see the different elements that can be used to define pressure zones, open the Pressure Zone manager by going to Analysis &amp;gt; Pressure Zones. Select the Options tab to see the elements and available element settings.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz1.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/729x333/__key/communityserver-wikis-components-files/00-00-00-00-32/pz1.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The screenshot above shows the default settings for the different elements. Since most valves and pumps are often used to define pressure zone boundaries, these are usually set to &amp;quot;Always Use&amp;quot;. You can also specify that general purpose valves (GPV), pipes and other elements define pressure zone boundaries. Note that while you can use pipes to define a boundary, the use of isolation valves associated with the pipe may be a better workflow, but the usage will be up to your engineering judgment.&lt;/p&gt;
&lt;p&gt;The Status Defaults will define all elements of a given type. However, if you have an individual element that will operate differently from the others of the same type, you can include an element override. Click the &amp;quot;Select from Drawing&amp;quot; button in the Element Override section of the Options tab and select the individual element. You can then change the &amp;quot;Use in Pressure Zone Trace&amp;quot; column to the setting you want to use.&lt;/p&gt;
&lt;p&gt;If you have a system that does not yet include valves or pumps and you want to see where the high and low pressures of your system are located, compute your model and then color code the pressure results to identify areas of high and low pressure. If you have an area of high pressure, you may want to add a PRV to reduce the pressure. If you have an area of low pressure, you may want to include a pump to add head to this part of the system.&lt;/p&gt;
&lt;p&gt;After you have added your elements or if you already have pumps and valves in a model, you can create a new pressure zone study by clicking the New button in the upper left of the manager. When you do this, you will need to choose a representative scenario for the study.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz2.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/401x324/__key/communityserver-wikis-components-files/00-00-00-00-32/pz2.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The name of the new study will be the name of the representative scenario. Highlight the new pressure zone study. In the Zone Scope tab, you define the scope of the pressure zone study. The default is to use the entire network, you can also use a subset of the network by choose that option from the Scope Type pulldown menu.&lt;/p&gt;
&lt;h3&gt;Zone Representative Elements&lt;/h3&gt;
&lt;p&gt;You can now run the pressure zone identification part of the Pressure Zone manager. However, if you want to associate pressure zones identified with Zones in the Zone Manager, the bottom of the right pane is the place to make that association. Each Zone is associated with a Representative Element - that is, an element that you are certain will be in the pressure zone associated with the Zone. This way, after the pressure zones are calculated, you can easily export them to the model and follow the naming scheme used in your list of pressure zones. For example if you identify element J-1 as being in zone &amp;quot;A&amp;quot; and you make that association here, when you calculate pressure zones and choose to export, it will assign zone &amp;quot;A&amp;quot; to J-1 AND other nodes in the same calculated pressure zone as J-1.&lt;/p&gt;
&lt;p&gt;For more on this, see&amp;nbsp;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/32704.automatically-assign-the-zone-property-based-on-calculated-pressure-zones"&gt;Automatically assign the Zone property based on calculated pressure zones&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz3.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/740x344/__key/communityserver-wikis-components-files/00-00-00-00-32/pz3.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;h3&gt;Computing and Viewing Pressure Zone Results&lt;/h3&gt;
&lt;p&gt;To identify pressure zones in your system, click the Compute button in the upper left of the Pressure Zone manager, then select the Zone Results tab. This will show the pressure zones present in the system, including the elements in the pressure zone, the length of pipes, and boundary nodes (i.e., the elements separating the different zones). It also includes a color column, which can be used to visually represent the pressure zones in the drawing.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz4.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/748x278/__key/communityserver-wikis-components-files/00-00-00-00-32/pz4.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;To see the color coding, click the &amp;quot;Highlight Pressure Zones&amp;quot; button, then move or minimize the Pressure Zone manager (Note: do not close the Pressure Zone manager as the color coding is only active when the Pressure Zone manager is open).&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz5.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/700x454/__key/communityserver-wikis-components-files/00-00-00-00-32/pz5.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The screenshot above shows the three pressure zones in a example model. The green zone is upstream of a pump station in the upper left of the system. The second in blue is a pressure zone downstream of a few PRVs. The section in red is between the pumps and the PRVs. If the PRVs represented not a single pressure zone, as in this modeling case, but three different pressure zones, you can add isolation valves at boundaries for the pressure zones. When you re-compute the model and the pressure zone study, the pressure zones will then be further defined.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz6.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/684x381/__key/communityserver-wikis-components-files/00-00-00-00-32/pz6.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;strong&gt;Note:&amp;nbsp;&lt;/strong&gt;The example model may be a good candidate for the use of a smaller scope than the entire network. The small pressure zone in the upper left is only the elements between the reservoir and the pumps. One could define a different scope that does not include the elements upstream of the pump and these would not be&amp;nbsp;used in the pressure zone study.&lt;/p&gt;
&lt;p&gt;In addition to visually identifying the pressure zones in the system, you can also generate a report with the data, export the pressure zones to the Zones manager, and zoom to individual pressure zones.&lt;/p&gt;
&lt;h3&gt;Creating Selection Sets Based on Zone&lt;/h3&gt;
&lt;p&gt;After zones have been established in the Pressure Zone Manager, you can choose to create selection sets containing all the elements within a particular zone. Select the zone of interest from the list, click the selection set button at the top and choose &amp;quot;Create Selection Set&amp;quot;. The new selection set will contain all elements (of any element type) within the selected zone based on the pressure zone manager results.&lt;/p&gt;
&lt;p&gt;&lt;img alt=" " border="0" src="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/CreateSelectionSet.png" /&gt;&lt;/p&gt;
&lt;h3&gt;Flow Balance Tool&lt;/h3&gt;
&lt;p&gt;Another tool available in the Pressure Zone manager is the Flow Balance tool. To see information for the current time step in an EPS model run (or to see the results in a steady state simulation), click the Flow Balance Tool button and select &amp;quot;Current time step&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz7.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/717x331/__key/communityserver-wikis-components-files/00-00-00-00-32/pz7.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;Here you will be able to see the demand in the different pressure zones as well as minimum and maximum hydraulic grades and pressures. This will allow to you&amp;nbsp;verify that the pressure results in different zones are reasonable.&lt;/p&gt;
&lt;p&gt;If you are looking at an EPS run, you can also identify the volume data for a system. After computing an EPS scenario and the pressure zone study for the EPS scenario, you can select the Flow Balance Tool and select &amp;quot;Volume&amp;quot;.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz8.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/723x442/__key/communityserver-wikis-components-files/00-00-00-00-32/pz8.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;This will show the total volume of water used in different pressure zones in the system. This can be especially useful for doing water audits or water loss studies, and identifying areas of possible leakage or pipe breaks.&lt;/p&gt;
&lt;p&gt;&lt;strong&gt;NOTE&lt;/strong&gt;: the demanded volume may not be correct if there are problems with network connectivity. For example if pumps are connected by a loop. Thoroughly check your network configuration for problems before running the Flow Balance tool. (reference #&amp;nbsp;711225).&lt;br /&gt;&lt;br /&gt;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;h3&gt;Identifying District Metering Areas&lt;/h3&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/25763.modeling-a-district-metered-area-dma"&gt;District Metering Areas &lt;/a&gt;may not necessary be areas with changes in pressure that are represented by valves and pumps. It is possible to define an area without the use of these types of elements.&amp;nbsp;&lt;/p&gt;
&lt;p&gt;DMAs often are bounded by meters. Typically the best element to represent a meter is a general purpose valve (GPV). You can place a GPV at the beginning of a DMA you want to define. You will need to identify a head vs flow curve for the GPV, but as meters typically see some head loss through the valve, that should not be a problem. The head vs flow curve you would use would simply be the curve expected for the meter in question.&lt;/p&gt;
&lt;p&gt;If you have multiple connections to a DMA, you would need another element to define the boundary. A good choice may be a PRV with an initial status of Closed and a pressure setting such that it will open when a certain pressure threshold is reached. Under normal conditions, flow would only go through the meter represented by the GPV, but if a high demand case occurs, such as a fire flow, the PRV will open when the pressure drops in the DMA.&amp;nbsp;&lt;br /&gt;&lt;br /&gt;&lt;/p&gt;
&lt;h3&gt;Quick Demonstration&lt;/h3&gt;
&lt;p&gt;&lt;a href="https://communities.bentley.com/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pressure-zone-manager.mp4"&gt;communities.bentley.com/.../pressure-zone-manager.mp4&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;h3&gt;Detailed Demonstration&lt;/h3&gt;
&lt;p&gt;&lt;a href="https://www.youtube.com/watch?v=il-ber8y9UU&amp;amp;t=14s"&gt;www.youtube.com/watch&lt;/a&gt;&lt;/p&gt;
&lt;h1&gt;See Also&lt;/h1&gt;
&lt;p&gt;&amp;quot;Using the Pressure Zone Manager&amp;quot; (Help topic)&lt;/p&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/32704.automatically-assign-the-zone-property-based-on-calculated-pressure-zones"&gt;Automatically assign the Zone property based on calculated pressure zones&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/25763.modeling-a-district-metered-area-dma"&gt;Modeling a District Metered Area (DMA)&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/20108.using-the-auto-update-isolation-valve-data-option-in-the-pressure-zone-manager"&gt;Using the Auto Update Isolation Valve Data option in the Pressure Zone Manager&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/20110/check-valve-option-not-working-in-pressure-zone-manager"&gt;Check valve option not working in pressure zone manager&lt;/a&gt;&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;

&lt;div style="font-size: 90%;"&gt;Tags: Pressure Zone Manager, calibration, reviewed2017, Flow Balance, WaterGEMS, WaterCAD, pressure zone&lt;/div&gt;
</description></item><item><title>Using the Pressure Zone Manager</title><link>https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/11913/using-the-pressure-zone-manager/revision/12</link><pubDate>Mon, 11 Feb 2019 16:50:06 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:ae0982c4-6ddf-4d39-9dd7-60fdd1c081b8</guid><dc:creator>Jesse Dringoli</dc:creator><comments>https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/11913/using-the-pressure-zone-manager#comments</comments><description>Revision 12 posted to OpenFlows | Water Infrastructure Wiki by Jesse Dringoli on 2/11/2019 4:50:06 PM&lt;br /&gt;
&lt;table style="background-color:#dce5f0;border:0px solid #dce5f0;" align="left" border="0"&gt;
&lt;tbody&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;b&gt;&amp;nbsp;&lt;/b&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;span style="font-size:medium;"&gt;&lt;b&gt;Applies To&amp;nbsp;&lt;/b&gt;&lt;/span&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Product(s):&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;WaterGEMS, WaterCAD&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Version(s):&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;V8i, CONNECT Edition&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Area:&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Modeling&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Original Author:&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Mark Pachlhofer, Bentley Technical Support Group&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/tbody&gt;
&lt;/table&gt;
&lt;h1&gt;Background&lt;/h1&gt;
&lt;p&gt;&lt;strong&gt;Please&amp;nbsp;see the video at the bottom for a quick demonstration.&lt;/strong&gt;&lt;/p&gt;
&lt;p&gt;The Pressure Zone Manager automatically identifies pressure zones or district meter areas (DMA) in your model and can assign appropriate labels to the &amp;quot;Zone&amp;quot; property. This could be current pressure zones or in the identification and planning of future pressure zones you may want to create in a system.&lt;/p&gt;
&lt;p&gt;Note: While both pressure zones and DMAs can be identified in the pressure zone manager, for simplicity we will use the term &amp;quot;pressure zone&amp;quot; to represent these, even though not all DMAs are pressure zones and vice versa.&lt;/p&gt;
&lt;h3&gt;Initial Configuration&lt;/h3&gt;
&lt;p&gt;Pressure zones are typically identified based on the location of pumps and valves in a system. However, it is also possible to define a pressure zone based on a pipe that is closed or that has a check valve on it. To see the different elements that can be used to define pressure zones, open the Pressure Zone manager by going to Analysis &amp;gt; Pressure Zones. Select the Options tab to see the elements and available element settings.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz1.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/729x333/__key/communityserver-wikis-components-files/00-00-00-00-32/pz1.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The screenshot above shows the default settings for the different elements. Since most valves and pumps are often used to define pressure zone boundaries, these are usually set to &amp;quot;Always Use&amp;quot;. You can also specify that general purpose valves (GPV), pipes and other elements define pressure zone boundaries. Note that while you can use pipes to define a boundary, the use of isolation valves associated with the pipe may be a better workflow, but the usage will be up to your engineering judgment.&lt;/p&gt;
&lt;p&gt;The Status Defaults will define all elements of a given type. However, if you have an individual element that will operate differently from the others of the same type, you can include an element override. Click the &amp;quot;Select from Drawing&amp;quot; button in the Element Override section of the Options tab and select the individual element. You can then change the &amp;quot;Use in Pressure Zone Trace&amp;quot; column to the setting you want to use.&lt;/p&gt;
&lt;p&gt;If you have a system that does not yet include valves or pumps and you want to see where the high and low pressures of your system are located, compute your model and then color code the pressure results to identify areas of high and low pressure. If you have an area of high pressure, you may want to add a PRV to reduce the pressure. If you have an area of low pressure, you may want to include a pump to add head to this part of the system.&lt;/p&gt;
&lt;p&gt;After you have added your elements or if you already have pumps and valves in a model, you can create a new pressure zone study by clicking the New button in the upper left of the manager. When you do this, you will need to choose a representative scenario for the study.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz2.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/401x324/__key/communityserver-wikis-components-files/00-00-00-00-32/pz2.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The name of the new study will be the name of the representative scenario. Highlight the new pressure zone study. In the Zone Scope tab, you define the scope of the pressure zone study. The default is to use the entire network, you can also use a subset of the network by choose that option from the Scope Type pulldown menu.&lt;/p&gt;
&lt;h3&gt;Zone Representative Elements&lt;/h3&gt;
&lt;p&gt;You can now run the pressure zone identification part of the Pressure Zone manager. However, if you want to associate pressure zones identified with Zones in the Zone Manager, the bottom of the right pane is the place to make that association. Each Zone is associated with a Representative Element - that is, an element that you are certain will be in the pressure zone associated with the Zone. This way, after the pressure zones are calculated, you can easily export them to the model and follow the naming scheme used in your list of pressure zones. For example if you identify element J-1 as being in zone &amp;quot;A&amp;quot; and you make that association here, when you calculate pressure zones and choose to export, it will assign zone &amp;quot;A&amp;quot; to J-1 AND other nodes in the same calculated pressure zone as J-1.&lt;/p&gt;
&lt;p&gt;For more on this, see&amp;nbsp;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/32704.automatically-assign-the-zone-property-based-on-calculated-pressure-zones"&gt;Automatically assign the Zone property based on calculated pressure zones&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz3.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/740x344/__key/communityserver-wikis-components-files/00-00-00-00-32/pz3.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;h3&gt;Computing and Viewing Pressure Zone Results&lt;/h3&gt;
&lt;p&gt;To identify pressure zones in your system, click the Compute button in the upper left of the Pressure Zone manager, then select the Zone Results tab. This will show the pressure zones present in the system, including the elements in the pressure zone, the length of pipes, and boundary nodes (i.e., the elements separating the different zones). It also includes a color column, which can be used to visually represent the pressure zones in the drawing.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz4.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/748x278/__key/communityserver-wikis-components-files/00-00-00-00-32/pz4.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;To see the color coding, click the &amp;quot;Highlight Pressure Zones&amp;quot; button, then move or minimize the Pressure Zone manager (Note: do not close the Pressure Zone manager as the color coding is only active when the Pressure Zone manager is open).&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz5.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/700x454/__key/communityserver-wikis-components-files/00-00-00-00-32/pz5.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The screenshot above shows the three pressure zones in a example model. The green zone is upstream of a pump station in the upper left of the system. The second in blue is a pressure zone downstream of a few PRVs. The section in red is between the pumps and the PRVs. If the PRVs represented not a single pressure zone, as in this modeling case, but three different pressure zones, you can add isolation valves at boundaries for the pressure zones. When you re-compute the model and the pressure zone study, the pressure zones will then be further defined.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz6.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/684x381/__key/communityserver-wikis-components-files/00-00-00-00-32/pz6.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;strong&gt;Note:&amp;nbsp;&lt;/strong&gt;The example model may be a good candidate for the use of a smaller scope than the entire network. The small pressure zone in the upper left is only the elements between the reservoir and the pumps. One could define a different scope that does not include the elements upstream of the pump and these would not be&amp;nbsp;used in the pressure zone study.&lt;/p&gt;
&lt;p&gt;In addition to visually identifying the pressure zones in the system, you can also generate a report with the data, export the pressure zones to the Zones manager, and zoom to individual pressure zones.&lt;/p&gt;
&lt;h3&gt;Flow Balance Tool&lt;/h3&gt;
&lt;p&gt;Another tool available in the Pressure Zone manager is the Flow Balance tool. To see information for the current time step in an EPS model run (or to see the results in a steady state simulation), click the Flow Balance Tool button and select &amp;quot;Current time step&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz7.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/717x331/__key/communityserver-wikis-components-files/00-00-00-00-32/pz7.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;Here you will be able to see the demand in the different pressure zones as well as minimum and maximum hydraulic grades and pressures. This will allow to you&amp;nbsp;verify that the pressure results in different zones are reasonable.&lt;/p&gt;
&lt;p&gt;If you are looking at an EPS run, you can also identify the volume data for a system. After computing an EPS scenario and the pressure zone study for the EPS scenario, you can select the Flow Balance Tool and select &amp;quot;Volume&amp;quot;.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz8.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/723x442/__key/communityserver-wikis-components-files/00-00-00-00-32/pz8.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;This will show the total volume of water used in different pressure zones in the system. This can be especially useful for doing water audits or water loss studies, and identifying areas of possible leakage or pipe breaks.&lt;/p&gt;
&lt;p&gt;&lt;strong&gt;NOTE&lt;/strong&gt;: the demanded volume may not be correct if there are problems with network connectivity. For example if pumps are connected by a loop. Thoroughly check your network configuration for problems before running the Flow Balance tool. (reference #&amp;nbsp;711225).&lt;br /&gt;&lt;br /&gt;&lt;/p&gt;
&lt;h3&gt;Identifying District Metering Areas&lt;/h3&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/25763.modeling-a-district-metered-area-dma"&gt;District Metering Areas &lt;/a&gt;may not necessary be areas with changes in pressure that are represented by valves and pumps. It is possible to define an area without the use of these types of elements.&amp;nbsp;&lt;/p&gt;
&lt;p&gt;DMAs often are bounded by meters. Typically the best element to represent a meter is a general purpose valve (GPV). You can place a GPV at the beginning of a DMA you want to define. You will need to identify a head vs flow curve for the GPV, but as meters typically see some head loss through the valve, that should not be a problem. The head vs flow curve you would use would simply be the curve expected for the meter in question.&lt;/p&gt;
&lt;p&gt;If you have multiple connections to a DMA, you would need another element to define the boundary. A good choice may be a PRV with an initial status of Closed and a pressure setting such that it will open when a certain pressure threshold is reached. Under normal conditions, flow would only go through the meter represented by the GPV, but if a high demand case occurs, such as a fire flow, the PRV will open when the pressure drops in the DMA.&amp;nbsp;&lt;br /&gt;&lt;br /&gt;&lt;/p&gt;
&lt;h3&gt;Quick Demonstration&lt;/h3&gt;
&lt;p&gt;&lt;a href="https://communities.bentley.com/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pressure-zone-manager.mp4"&gt;communities.bentley.com/.../pressure-zone-manager.mp4&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;h3&gt;Detailed Demonstration&lt;/h3&gt;
&lt;p&gt;&lt;a href="https://www.youtube.com/watch?v=il-ber8y9UU&amp;amp;t=14s"&gt;www.youtube.com/watch&lt;/a&gt;&lt;/p&gt;
&lt;h1&gt;See Also&lt;/h1&gt;
&lt;p&gt;&amp;quot;Using the Pressure Zone Manager&amp;quot; (Help topic)&lt;/p&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/32704.automatically-assign-the-zone-property-based-on-calculated-pressure-zones"&gt;Automatically assign the Zone property based on calculated pressure zones&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/25763.modeling-a-district-metered-area-dma"&gt;Modeling a District Metered Area (DMA)&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/20108.using-the-auto-update-isolation-valve-data-option-in-the-pressure-zone-manager"&gt;Using the Auto Update Isolation Valve Data option in the Pressure Zone Manager&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/20110/check-valve-option-not-working-in-pressure-zone-manager"&gt;Check valve option not working in pressure zone manager&lt;/a&gt;&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;

&lt;div style="font-size: 90%;"&gt;Tags: Pressure Zone Manager, calibration, reviewed2017, Flow Balance, WaterGEMS, WaterCAD, pressure zone&lt;/div&gt;
</description></item><item><title>Using the Pressure Zone Manager</title><link>https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/11913/using-the-pressure-zone-manager/revision/11</link><pubDate>Thu, 12 Jul 2018 15:01:21 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:ae0982c4-6ddf-4d39-9dd7-60fdd1c081b8</guid><dc:creator>Jesse Dringoli</dc:creator><comments>https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/11913/using-the-pressure-zone-manager#comments</comments><description>Revision 11 posted to OpenFlows | Water Infrastructure Wiki by Jesse Dringoli on 7/12/2018 3:01:21 PM&lt;br /&gt;
&lt;table style="background-color:#dce5f0;border:0px solid #dce5f0;" align="left" border="0"&gt;
&lt;tbody&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;b&gt;&amp;nbsp;&lt;/b&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;span style="font-size:medium;"&gt;&lt;b&gt;Applies To&amp;nbsp;&lt;/b&gt;&lt;/span&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Product(s):&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;WaterGEMS, WaterCAD&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Version(s):&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;V8i, CONNECT Edition&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Area:&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Modeling&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Original Author:&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Mark Pachlhofer, Bentley Technical Support Group&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/tbody&gt;
&lt;/table&gt;
&lt;h1&gt;Background&lt;/h1&gt;
&lt;p&gt;&lt;strong&gt;Please&amp;nbsp;see the video at the bottom for a quick demonstration.&lt;/strong&gt;&lt;/p&gt;
&lt;p&gt;The Pressure Zone Manager automatically identifies pressure zones or district meter areas (DMA) in your model and can assign appropriate labels to the &amp;quot;Zone&amp;quot; property. This could be current pressure zones or in the identification and planning of future pressure zones you may want to create in a system.&lt;/p&gt;
&lt;p&gt;Note: While both pressure zones and DMAs can be identified in the pressure zone manager, for simplicity we will use the term &amp;quot;pressure zone&amp;quot; to represent these, even though not all DMAs are pressure zones and vice versa.&lt;/p&gt;
&lt;h3&gt;Initial Configuration&lt;/h3&gt;
&lt;p&gt;Pressure zones are typically identified based on the location of pumps and valves in a system. However, it is also possible to define a pressure zone based on a pipe that is closed or that has a check valve on it. To see the different elements that can be used to define pressure zones, open the Pressure Zone manager by going to Analysis &amp;gt; Pressure Zones. Select the Options tab to see the elements and available element settings.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz1.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/729x333/__key/communityserver-wikis-components-files/00-00-00-00-32/pz1.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The screenshot above shows the default settings for the different elements. Since most valves and pumps are often used to define pressure zone boundaries, these are usually set to &amp;quot;Always Use&amp;quot;. You can also specify that general purpose valves (GPV), pipes and other elements define pressure zone boundaries. Note that while you can use pipes to define a boundary, the use of isolation valves associated with the pipe may be a better workflow, but the usage will be up to your engineering judgment.&lt;/p&gt;
&lt;p&gt;The Status Defaults will define all elements of a given type. However, if you have an individual element that will operate differently from the others of the same type, you can include an element override. Click the &amp;quot;Select from Drawing&amp;quot; button in the Element Override section of the Options tab and select the individual element. You can then change the &amp;quot;Use in Pressure Zone Trace&amp;quot; column to the setting you want to use.&lt;/p&gt;
&lt;p&gt;If you have a system that does not yet include valves or pumps and you want to see where the high and low pressures of your system are located, compute your model and then color code the pressure results to identify areas of high and low pressure. If you have an area of high pressure, you may want to add a PRV to reduce the pressure. If you have an area of low pressure, you may want to include a pump to add head to this part of the system.&lt;/p&gt;
&lt;p&gt;After you have added your elements or if you already have pumps and valves in a model, you can create a new pressure zone study by clicking the New button in the upper left of the manager. When you do this, you will need to choose a representative scenario for the study.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz2.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/401x324/__key/communityserver-wikis-components-files/00-00-00-00-32/pz2.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The name of the new study will be the name of the representative scenario. Highlight the new pressure zone study. In the Zone Scope tab, you define the scope of the pressure zone study. The default is to use the entire network, you can also use a subset of the network by choose that option from the Scope Type pulldown menu.&lt;/p&gt;
&lt;h3&gt;Zone Representative Elements&lt;/h3&gt;
&lt;p&gt;You can now run the pressure zone identification part of the Pressure Zone manager. However, if you want to associate pressure zones identified with Zones in the Zone Manager, the bottom of the right pane is the place to make that association. Each Zone is associated with a Representative Element - that is, an element that you are certain will be in the pressure zone associated with the Zone. This way, after the pressure zones are calculated, you can easily export them to the model and follow the naming scheme used in your list of pressure zones. For example if you identify element J-1 as being in zone &amp;quot;A&amp;quot; and you make that association here, when you calculate pressure zones and choose to export, it will assign zone &amp;quot;A&amp;quot; to J-1 AND other nodes in the same calculated pressure zone as J-1.&lt;/p&gt;
&lt;p&gt;For more on this, see&amp;nbsp;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/32704.automatically-assign-the-zone-property-based-on-calculated-pressure-zones"&gt;Automatically assign the Zone property based on calculated pressure zones&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz3.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/740x344/__key/communityserver-wikis-components-files/00-00-00-00-32/pz3.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;h3&gt;Computing and Viewing Pressure Zone Results&lt;/h3&gt;
&lt;p&gt;To identify pressure zones in your system, click the Compute button in the upper left of the Pressure Zone manager, then select the Zone Results tab. This will show the pressure zones present in the system, including the elements in the pressure zone, the length of pipes, and boundary nodes (i.e., the elements separating the different zones). It also includes a color column, which can be used to visually represent the pressure zones in the drawing.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz4.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/748x278/__key/communityserver-wikis-components-files/00-00-00-00-32/pz4.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;To see the color coding, click the &amp;quot;Highlight Pressure Zones&amp;quot; button, then move or minimize the Pressure Zone manager (Note: do not close the Pressure Zone manager as the color coding is only active when the Pressure Zone manager is open).&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz5.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/700x454/__key/communityserver-wikis-components-files/00-00-00-00-32/pz5.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The screenshot above shows the three pressure zones in a example model. The green zone is upstream of a pump station in the upper left of the system. The second in blue is a pressure zone downstream of a few PRVs. The section in red is between the pumps and the PRVs. If the PRVs represented not a single pressure zone, as in this modeling case, but three different pressure zones, you can add isolation valves at boundaries for the pressure zones. When you re-compute the model and the pressure zone study, the pressure zones will then be further defined.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz6.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/684x381/__key/communityserver-wikis-components-files/00-00-00-00-32/pz6.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;strong&gt;Note:&amp;nbsp;&lt;/strong&gt;The example model may be a good candidate for the use of a smaller scope than the entire network. The small pressure zone in the upper left is only the elements between the reservoir and the pumps. One could define a different scope that does not include the elements upstream of the pump and these would not be&amp;nbsp;used in the pressure zone study.&lt;/p&gt;
&lt;p&gt;In addition to visually identifying the pressure zones in the system, you can also generate a report with the data, export the pressure zones to the Zones manager, and zoom to individual pressure zones.&lt;/p&gt;
&lt;h3&gt;Flow Balance Tool&lt;/h3&gt;
&lt;p&gt;Another tool available in the Pressure Zone manager is the Flow Balance tool. To see information for the current time step in an EPS model run (or to see the results in a steady state simulation), click the Flow Balance Tool button and select &amp;quot;Current time step&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz7.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/717x331/__key/communityserver-wikis-components-files/00-00-00-00-32/pz7.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;Here you will be able to see the demand in the different pressure zones as well as minimum and maximum hydraulic grades and pressures. This will allow to you&amp;nbsp;verify that the pressure results in different zones are reasonable.&lt;/p&gt;
&lt;p&gt;If you are looking at an EPS run, you can also identify the volume data for a system. After computing an EPS scenario and the pressure zone study for the EPS scenario, you can select the Flow Balance Tool and select &amp;quot;Volume&amp;quot;.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz8.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/723x442/__key/communityserver-wikis-components-files/00-00-00-00-32/pz8.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;This will show the total volume of water used in different pressure zones in the system. This can be especially useful for doing water audits or water loss studies, and identifying areas of possible leakage or pipe breaks.&lt;/p&gt;
&lt;h3&gt;Identifying District Metering Areas&lt;/h3&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/25763.modeling-a-district-metered-area-dma"&gt;District Metering Areas &lt;/a&gt;may not necessary be areas with changes in pressure that are represented by valves and pumps. It is possible to define an area without the use of these types of elements.&amp;nbsp;&lt;/p&gt;
&lt;p&gt;DMAs often are bounded by meters. Typically the best element to represent a meter is a general purpose valve (GPV). You can place a GPV at the beginning of a DMA you want to define. You will need to identify a head vs flow curve for the GPV, but as meters typically see some head loss through the valve, that should not be a problem. The head vs flow curve you would use would simply be the curve expected for the meter in question.&lt;/p&gt;
&lt;p&gt;If you have multiple connections to a DMA, you would need another element to define the boundary. A good choice may be a PRV with an initial status of Closed and a pressure setting such that it will open when a certain pressure threshold is reached. Under normal conditions, flow would only go through the meter represented by the GPV, but if a high demand case occurs, such as a fire flow, the PRV will open when the pressure drops in the DMA.&amp;nbsp;&lt;br /&gt;&lt;br /&gt;&lt;/p&gt;
&lt;h3&gt;Quick Demonstration&lt;/h3&gt;
&lt;p&gt;&lt;a href="https://communities.bentley.com/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pressure-zone-manager.mp4"&gt;communities.bentley.com/.../pressure-zone-manager.mp4&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;h3&gt;Detailed Demonstration&lt;/h3&gt;
&lt;p&gt;&lt;a href="https://www.youtube.com/watch?v=il-ber8y9UU&amp;amp;t=14s"&gt;www.youtube.com/watch&lt;/a&gt;&lt;/p&gt;
&lt;h1&gt;See Also&lt;/h1&gt;
&lt;p&gt;&amp;quot;Using the Pressure Zone Manager&amp;quot; (Help topic)&lt;/p&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/32704.automatically-assign-the-zone-property-based-on-calculated-pressure-zones"&gt;Automatically assign the Zone property based on calculated pressure zones&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/25763.modeling-a-district-metered-area-dma"&gt;Modeling a District Metered Area (DMA)&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/20108.using-the-auto-update-isolation-valve-data-option-in-the-pressure-zone-manager"&gt;Using the Auto Update Isolation Valve Data option in the Pressure Zone Manager&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/20110/check-valve-option-not-working-in-pressure-zone-manager"&gt;Check valve option not working in pressure zone manager&lt;/a&gt;&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;

&lt;div style="font-size: 90%;"&gt;Tags: Pressure Zone Manager, calibration, reviewed2017, Flow Balance, WaterGEMS, WaterCAD, pressure zone&lt;/div&gt;
</description></item><item><title>Using the Pressure Zone Manager</title><link>https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/11913/using-the-pressure-zone-manager/revision/10</link><pubDate>Mon, 28 Aug 2017 17:32:59 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:ae0982c4-6ddf-4d39-9dd7-60fdd1c081b8</guid><dc:creator>Craig Calvin</dc:creator><comments>https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/11913/using-the-pressure-zone-manager#comments</comments><description>Revision 10 posted to OpenFlows | Water Infrastructure Wiki by Craig Calvin on 8/28/2017 5:32:59 PM&lt;br /&gt;
&lt;h1&gt;&lt;/h1&gt;
&lt;table style="background-color:#dce5f0;border:0px solid #dce5f0;" align="left" border="0"&gt;
&lt;tbody&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;b&gt;&amp;nbsp;&lt;/b&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;span style="font-size:medium;"&gt;&lt;b&gt;Applies To&amp;nbsp;&lt;/b&gt;&lt;/span&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Product(s):&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Bentley WaterGEMS, Bentley WaterCAD&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Version(s):&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;08.11.xx.xx&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Area:&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Modeling&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Original Author:&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Mark Pachlhofer, Bentley Technical Support Group&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/tbody&gt;
&lt;/table&gt;
&lt;h1&gt;Background&lt;/h1&gt;
&lt;p&gt;&lt;strong&gt;Please&amp;nbsp;see the video at the bottom for a quick demonstration.&lt;/strong&gt;&lt;/p&gt;
&lt;p&gt;The Pressure Zone Manager automatically identifies pressure zones or district meter areas (DMA) in your model and can assign appropriate labels to the &amp;quot;Zone&amp;quot; property. This could be current pressure zones or in the identification and planning of future pressure zones you may want to create in a system.&lt;/p&gt;
&lt;p&gt;Note: While both pressure zones and DMAs can be identified in the pressure zone manager, for simplicity we will use the term &amp;quot;pressure zone&amp;quot; to represent these, even though not all DMAs are pressure zones and vice versa.&lt;/p&gt;
&lt;h3&gt;Initial Configuration&lt;/h3&gt;
&lt;p&gt;Pressure zones are typically identified based on the location of pumps and valves in a system. However, it is also possible to define a pressure zone based on a pipe that is closed or that has a check valve on it. To see the different elements that can be used to define pressure zones, open the Pressure Zone manager by going to Analysis &amp;gt; Pressure Zones. Select the Options tab to see the elements and available element settings.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz1.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/729x333/__key/communityserver-wikis-components-files/00-00-00-00-32/pz1.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The screenshot above shows the default settings for the different elements. Since most valves and pumps are often used to define pressure zone boundaries, these are usually set to &amp;quot;Always Use&amp;quot;. You can also specify that general purpose valves (GPV), pipes and other elements define pressure zone boundaries. Note that while you can use pipes to define a boundary, the use of isolation valves associated with the pipe may be a better workflow, but the usage will be up to your engineering judgment.&lt;/p&gt;
&lt;p&gt;The Status Defaults will define all elements of a given type. However, if you have an individual element that will operate differently from the others of the same type, you can include an element override. Click the &amp;quot;Select from Drawing&amp;quot; button in the Element Override section of the Options tab and select the individual element. You can then change the &amp;quot;Use in Pressure Zone Trace&amp;quot; column to the setting you want to use.&lt;/p&gt;
&lt;p&gt;If you have a system that does not yet include valves or pumps and you want to see where the high and low pressures of your system are located, compute your model and then color code the pressure results to identify areas of high and low pressure. If you have an area of high pressure, you may want to add a PRV to reduce the pressure. If you have an area of low pressure, you may want to include a pump to add head to this part of the system.&lt;/p&gt;
&lt;p&gt;After you have added your elements or if you already have pumps and valves in a model, you can create a new pressure zone study by clicking the New button in the upper left of the manager. When you do this, you will need to choose a representative scenario for the study.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz2.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/401x324/__key/communityserver-wikis-components-files/00-00-00-00-32/pz2.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The name of the new study will be the name of the representative scenario. Highlight the new pressure zone study. In the Zone Scope tab, you define the scope of the pressure zone study. The default is to use the entire network, you can also use a subset of the network by choose that option from the Scope Type pulldown menu.&lt;/p&gt;
&lt;h3&gt;Zone Representative Elements&lt;/h3&gt;
&lt;p&gt;You can now run the pressure zone identification part of the Pressure Zone manager. However, if you want to associate pressure zones identified with Zones in the Zone Manager, the bottom of the right pane is the place to make that association. Each Zone is associated with a Representative Element - that is, an element that you are certain will be in the pressure zone associated with the Zone. This way, after the pressure zones are calculated, you can easily export them to the model and follow the naming scheme used in your list of pressure zones. For example if you identify element J-1 as being in zone &amp;quot;A&amp;quot; and you make that association here, when you calculate pressure zones and choose to export, it will assign zone &amp;quot;A&amp;quot; to J-1 AND other nodes in the same calculated pressure zone as J-1.&lt;/p&gt;
&lt;p&gt;For more on this, see&amp;nbsp;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/32704.automatically-assign-the-zone-property-based-on-calculated-pressure-zones"&gt;Automatically assign the Zone property based on calculated pressure zones&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz3.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/740x344/__key/communityserver-wikis-components-files/00-00-00-00-32/pz3.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;h3&gt;Computing and Viewing Pressure Zone Results&lt;/h3&gt;
&lt;p&gt;To identify pressure zones in your system, click the Compute button in the upper left of the Pressure Zone manager, then select the Zone Results tab. This will show the pressure zones present in the system, including the elements in the pressure zone, the length of pipes, and boundary nodes (i.e., the elements separating the different zones). It also includes a color column, which can be used to visually represent the pressure zones in the drawing.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz4.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/748x278/__key/communityserver-wikis-components-files/00-00-00-00-32/pz4.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;To see the color coding, click the &amp;quot;Highlight Pressure Zones&amp;quot; button, then move or minimize the Pressure Zone manager (Note: do not close the Pressure Zone manager as the color coding is only active when the Pressure Zone manager is open).&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz5.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/700x454/__key/communityserver-wikis-components-files/00-00-00-00-32/pz5.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The screenshot above shows the three pressure zones in a example model. The green zone is upstream of a pump station in the upper left of the system. The second in blue is a pressure zone downstream of a few PRVs. The section in red is between the pumps and the PRVs. If the PRVs represented not a single pressure zone, as in this modeling case, but three different pressure zones, you can add isolation valves at boundaries for the pressure zones. When you re-compute the model and the pressure zone study, the pressure zones will then be further defined.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz6.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/684x381/__key/communityserver-wikis-components-files/00-00-00-00-32/pz6.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;strong&gt;Note:&amp;nbsp;&lt;/strong&gt;The example model may be a good candidate for the use of a smaller scope than the entire network. The small pressure zone in the upper left is only the elements between the reservoir and the pumps. One could define a different scope that does not include the elements upstream of the pump and these would not be&amp;nbsp;used in the pressure zone study.&lt;/p&gt;
&lt;p&gt;In addition to visually identifying the pressure zones in the system, you can also generate a report with the data, export the pressure zones to the Zones manager, and zoom to individual pressure zones.&lt;/p&gt;
&lt;h3&gt;Flow Balance Tool&lt;/h3&gt;
&lt;p&gt;Another tool available in the Pressure Zone manager is the Flow Balance tool. To see information for the current time step in an EPS model run (or to see the results in a steady state simulation), click the Flow Balance Tool button and select &amp;quot;Current time step&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz7.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/717x331/__key/communityserver-wikis-components-files/00-00-00-00-32/pz7.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;Here you will be able to see the demand in the different pressure zones as well as minimum and maximum hydraulic grades and pressures. This will allow to you&amp;nbsp;verify that the pressure results in different zones are reasonable.&lt;/p&gt;
&lt;p&gt;If you are looking at an EPS run, you can also identify the volume data for a system. After computing an EPS scenario and the pressure zone study for the EPS scenario, you can select the Flow Balance Tool and select &amp;quot;Volume&amp;quot;.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz8.jpg"&gt;&lt;img alt=" " src="/resized-image/__size/723x442/__key/communityserver-wikis-components-files/00-00-00-00-32/pz8.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;This will show the total volume of water used in different pressure zones in the system. This can be especially useful for doing water audits or water loss studies, and identifying areas of possible leakage or pipe breaks.&lt;/p&gt;
&lt;h3&gt;Identifying District Metering Areas&lt;/h3&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/25763.modeling-a-district-metered-area-dma"&gt;District Metering Areas &lt;/a&gt;may not necessary be areas with changes in pressure that are represented by valves and pumps. It is possible to define an area without the use of these types of elements.&amp;nbsp;&lt;/p&gt;
&lt;p&gt;DMAs often are bounded by meters. Typically the best element to represent a meter is a general purpose valve (GPV). You can place a GPV at the beginning of a DMA you want to define. You will need to identify a head vs flow curve for the GPV, but as meters typically see some head loss through the valve, that should not be a problem. The head vs flow curve you would use would simply be the curve expected for the meter in question.&lt;/p&gt;
&lt;p&gt;If you have multiple connections to a DMA, you would need another element to define the boundary. A good choice may be a PRV with an initial status of Closed and a pressure setting such that it will open when a certain pressure threshold is reached. Under normal conditions, flow would only go through the meter represented by the GPV, but if a high demand case occurs, such as a fire flow, the PRV will open when the pressure drops in the DMA.&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&lt;a href="https://communities.bentley.com/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pressure-zone-manager.mp4"&gt;communities.bentley.com/.../pressure-zone-manager.mp4&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;h1&gt;See Also&lt;/h1&gt;
&lt;p&gt;&amp;quot;Using the Pressure Zone Manager&amp;quot; (Help topic)&lt;/p&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/32704.automatically-assign-the-zone-property-based-on-calculated-pressure-zones"&gt;Automatically assign the Zone property based on calculated pressure zones&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/25763.modeling-a-district-metered-area-dma"&gt;Modeling a District Metered Area (DMA)&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/20108.using-the-auto-update-isolation-valve-data-option-in-the-pressure-zone-manager"&gt;Using the Auto Update Isolation Valve Data option in the Pressure Zone Manager&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/20110/check-valve-option-not-working-in-pressure-zone-manager"&gt;Check valve option not working in pressure zone manager&lt;/a&gt;&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;

&lt;div style="font-size: 90%;"&gt;Tags: Pressure Zone Manager, calibration, reviewed2017, Flow Balance, WaterGEMS, WaterCAD, pressure zone&lt;/div&gt;
</description></item><item><title>Using the Pressure Zone Manager</title><link>https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/11913/using-the-pressure-zone-manager/revision/9</link><pubDate>Mon, 30 Jan 2017 22:31:21 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:ae0982c4-6ddf-4d39-9dd7-60fdd1c081b8</guid><dc:creator>Jesse Dringoli</dc:creator><comments>https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/11913/using-the-pressure-zone-manager#comments</comments><description>Revision 9 posted to OpenFlows | Water Infrastructure Wiki by Jesse Dringoli on 1/30/2017 10:31:21 PM&lt;br /&gt;
&lt;h1&gt;&lt;/h1&gt;
&lt;table align="left" style="border:0px solid #dce5f0;background-color:#dce5f0;" border="0"&gt;
&lt;tbody&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;b&gt;&amp;nbsp;&lt;/b&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;span style="font-size:medium;"&gt;&lt;b&gt;Applies To&amp;nbsp;&lt;/b&gt;&lt;/span&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Product(s):&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Bentley WaterGEMS, Bentley WaterCAD&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Version(s):&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;08.11.xx.xx&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Area:&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Modeling&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Original Author:&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Mark Pachlhofer, Bentley Technical Support Group&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/tbody&gt;
&lt;/table&gt;
&lt;h1&gt;Background&lt;/h1&gt;
&lt;p&gt;&lt;strong&gt;Please&amp;nbsp;see the video at the bottom for a quick demonstration.&lt;/strong&gt;&lt;/p&gt;
&lt;p&gt;The Pressure Zone Manager automatically identifies pressure zones or district meter areas (DMA) in your model and can assign appropriate labels to the &amp;quot;Zone&amp;quot; property. This could be current pressure zones or in the identification and planning of future pressure zones you may want to create in a system.&lt;/p&gt;
&lt;p&gt;Note: While both pressure zones and DMAs can be identified in the pressure zone manager, for simplicity we will use the term &amp;quot;pressure zone&amp;quot; to represent these, even though not all DMAs are pressure zones and vice versa.&lt;/p&gt;
&lt;h3&gt;Initial Configuration&lt;/h3&gt;
&lt;p&gt;Pressure zones are typically identified based on the location of pumps and valves in a system. However, it is also possible to define a pressure zone based on a pipe that is closed or that has a check valve on it. To see the different elements that can be used to define pressure zones, open the Pressure Zone manager by going to Analysis &amp;gt; Pressure Zones. Select the Options tab to see the elements and available element settings.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz1.jpg"&gt;&lt;img width="729" height="333" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz1.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The screenshot above shows the default settings for the different elements. Since most valves and pumps are often used to define pressure zone boundaries, these are usually set to &amp;quot;Always Use&amp;quot;. You can also specify that general purpose valves (GPV), pipes and other elements define pressure zone boundaries. Note that while you can use pipes to define a boundary, the use of isolation valves associated with the pipe may be a better workflow, but the usage will be up to your engineering judgment.&lt;/p&gt;
&lt;p&gt;The Status Defaults will define all elements of a given type. However, if you have an individual element that will operate differently from the others of the same type, you can include an element override. Click the &amp;quot;Select from Drawing&amp;quot; button in the Element Override section of the Options tab and select the individual element. You can then change the &amp;quot;Use in Pressure Zone Trace&amp;quot; column to the setting you want to use.&lt;/p&gt;
&lt;p&gt;If you have a system that does not yet include valves or pumps and you want to see where the high and low pressures of your system are located, compute your model and then color code the pressure results to identify areas of high and low pressure. If you have an area of high pressure, you may want to add a PRV to reduce the pressure. If you have an area of low pressure, you may want to include a pump to add head to this part of the system.&lt;/p&gt;
&lt;p&gt;After you have added your elements or if you already have pumps and valves in a model, you can create a new pressure zone study by clicking the New button in the upper left of the manager. When you do this, you will need to choose a representative scenario for the study.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz2.jpg"&gt;&lt;img width="401" height="324" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz2.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The name of the new study will be the name of the representative scenario. Highlight the new pressure zone study. In the Zone Scope tab, you define the scope of the pressure zone study. The default is to use the entire network, you can also use a subset of the network by choose that option from the Scope Type pulldown menu.&lt;/p&gt;
&lt;h3&gt;Zone Representative Elements&lt;/h3&gt;
&lt;p&gt;You can now run the pressure zone identification part of the Pressure Zone manager. However, if you want to associate pressure zones identified with Zones in the Zone Manager, the bottom of the right pane is the place to make that association. Each Zone is associated with a Representative Element - that is, an element that you are certain will be in the pressure zone associated with the Zone. This way, after the pressure zones are calculated, you can easily export them to the model and follow the naming scheme used in your list of pressure zones. For example if you identify element J-1 as being in zone &amp;quot;A&amp;quot; and you make that association here, when you calculate pressure zones and choose to export, it will assign zone &amp;quot;A&amp;quot; to J-1 AND other nodes in the same calculated pressure zone as J-1.&lt;/p&gt;
&lt;p&gt;For more on this, see&amp;nbsp;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/32704.automatically-assign-the-zone-property-based-on-calculated-pressure-zones"&gt;Automatically assign the Zone property based on calculated pressure zones&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz3.jpg"&gt;&lt;img width="740" height="344" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz3.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;h3&gt;Computing and Viewing Pressure Zone Results&lt;/h3&gt;
&lt;p&gt;To identify pressure zones in your system, click the Compute button in the upper left of the Pressure Zone manager, then select the Zone Results tab. This will show the pressure zones present in the system, including the elements in the pressure zone, the length of pipes, and boundary nodes (i.e., the elements separating the different zones). It also includes a color column, which can be used to visually represent the pressure zones in the drawing.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz4.jpg"&gt;&lt;img width="748" height="278" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz4.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;To see the color coding, click the &amp;quot;Highlight Pressure Zones&amp;quot; button, then move or minimize the Pressure Zone manager (Note: do not close the Pressure Zone manager as the color coding is only active when the Pressure Zone manager is open).&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz5.jpg"&gt;&lt;img width="700" height="454" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz5.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The screenshot above shows the three pressure zones in a example model. The green zone is upstream of a pump station in the upper left of the system. The second in blue is a pressure zone downstream of a few PRVs. The section in red is between the pumps and the PRVs. If the PRVs represented not a single pressure zone, as in this modeling case, but three different pressure zones, you can add isolation valves at boundaries for the pressure zones. When you re-compute the model and the pressure zone study, the pressure zones will then be further defined.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz6.jpg"&gt;&lt;img width="684" height="381" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz6.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;strong&gt;Note:&amp;nbsp;&lt;/strong&gt;The example model may be a good candidate for the use of a smaller scope than the entire network. The small pressure zone in the upper left is only the elements between the reservoir and the pumps. One could define a different scope that does not include the elements upstream of the pump and these would not be&amp;nbsp;used in the pressure zone study.&lt;/p&gt;
&lt;p&gt;In addition to visually identifying the pressure zones in the system, you can also generate a report with the data, export the pressure zones to the Zones manager, and zoom to individual pressure zones.&lt;/p&gt;
&lt;h3&gt;Flow Balance Tool&lt;/h3&gt;
&lt;p&gt;Another tool available in the Pressure Zone manager is the Flow Balance tool. To see information for the current time step in an EPS model run (or to see the results in a steady state simulation), click the Flow Balance Tool button and select &amp;quot;Current time step&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz7.jpg"&gt;&lt;img width="717" height="331" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz7.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;Here you will be able to see the demand in the different pressure zones as well as minimum and maximum hydraulic grades and pressures. This will allow to you&amp;nbsp;verify that the pressure results in different zones are reasonable.&lt;/p&gt;
&lt;p&gt;If you are looking at an EPS run, you can also identify the volume data for a system. After computing an EPS scenario and the pressure zone study for the EPS scenario, you can select the Flow Balance Tool and select &amp;quot;Volume&amp;quot;.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz8.jpg"&gt;&lt;img width="723" height="442" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz8.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;This will show the total volume of water used in different pressure zones in the system. This can be especially useful for doing water audits or water loss studies, and identifying areas of possible leakage or pipe breaks.&lt;/p&gt;
&lt;h3&gt;Identifying District Metering Areas&lt;/h3&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/25763.modeling-a-district-metered-area-dma"&gt;District Metering Areas &lt;/a&gt;may not necessary be areas with changes in pressure that are represented by valves and pumps. It is possible to define an area without the use of these types of elements.&amp;nbsp;&lt;/p&gt;
&lt;p&gt;DMAs often are bounded by meters. Typically the best element to represent a meter is a general purpose valve (GPV). You can place a GPV at the beginning of a DMA you want to define. You will need to identify a head vs flow curve for the GPV, but as meters typically see some head loss through the valve, that should not be a problem. The head vs flow curve you would use would simply be the curve expected for the meter in question.&lt;/p&gt;
&lt;p&gt;If you have multiple connections to a DMA, you would need another element to define the boundary. A good choice may be a PRV with an initial status of Closed and a pressure setting such that it will open when a certain pressure threshold is reached. Under normal conditions, flow would only go through the meter represented by the GPV, but if a high demand case occurs, such as a fire flow, the PRV will open when the pressure drops in the DMA.&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&lt;a href="https://communities.bentley.com/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pressure-zone-manager.mp4"&gt;communities.bentley.com/.../pressure-zone-manager.mp4&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;h1&gt;See Also&lt;/h1&gt;
&lt;p&gt;&amp;quot;Using the Pressure Zone Manager&amp;quot; (Help topic)&lt;/p&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/32704.automatically-assign-the-zone-property-based-on-calculated-pressure-zones"&gt;Automatically assign the Zone property based on calculated pressure zones&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/25763.modeling-a-district-metered-area-dma"&gt;Modeling a District Metered Area (DMA)&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/20108.using-the-auto-update-isolation-valve-data-option-in-the-pressure-zone-manager"&gt;Using the Auto Update Isolation Valve Data option in the Pressure Zone Manager&lt;/a&gt;&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;

&lt;div style="font-size: 90%;"&gt;Tags: Pressure Zone Manager, calibration, reviewed2017, Flow Balance, WaterGEMS, WaterCAD, pressure zone&lt;/div&gt;
</description></item><item><title>Using the Pressure Zone Manager</title><link>https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/11913/using-the-pressure-zone-manager/revision/8</link><pubDate>Mon, 30 Jan 2017 14:29:17 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:ae0982c4-6ddf-4d39-9dd7-60fdd1c081b8</guid><dc:creator>Jesse Dringoli</dc:creator><comments>https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/11913/using-the-pressure-zone-manager#comments</comments><description>Revision 8 posted to OpenFlows | Water Infrastructure Wiki by Jesse Dringoli on 1/30/2017 2:29:17 PM&lt;br /&gt;
&lt;h1&gt;&lt;/h1&gt;
&lt;table align="left" style="border:0px solid #dce5f0;background-color:#dce5f0;" border="0"&gt;
&lt;tbody&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;b&gt;&amp;nbsp;&lt;/b&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;span style="font-size:medium;"&gt;&lt;b&gt;Applies To&amp;nbsp;&lt;/b&gt;&lt;/span&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Product(s):&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Bentley WaterGEMS, Bentley WaterCAD&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Version(s):&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;08.11.xx.xx&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Area:&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Modeling&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Original Author:&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Mark Pachlhofer, Bentley Technical Support Group&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/tbody&gt;
&lt;/table&gt;
&lt;h1&gt;Background&lt;/h1&gt;
&lt;p&gt;&lt;strong&gt;Please&amp;nbsp;see the video at the bottom for a quick demonstration.&lt;/strong&gt;&lt;/p&gt;
&lt;p&gt;The Pressure Zone Manager automatically identifies pressure zones or district meter areas (DMA) in your model and can assign appropriate labels to the &amp;quot;Zone&amp;quot; property. This could be current pressure zones or in the identification and planning of future pressure zones you may want to create in a system.&lt;/p&gt;
&lt;p&gt;Note: While both pressure zones and DMAs can be identified in the pressure zone manager, for simplicity we will use the term &amp;quot;pressure zone&amp;quot; to represent these, even though not all DMAs are pressure zones and vice versa.&lt;/p&gt;
&lt;h3&gt;Initial Configuration&lt;/h3&gt;
&lt;p&gt;Pressure zones are typically identified based on the location of pumps and valves in a system. However, it is also possible to define a pressure zone based on a pipe that is closed or that has a check valve on it. To see the different elements that can be used to define pressure zones, open the Pressure Zone manager by going to Analysis &amp;gt; Pressure Zones. Select the Options tab to see the elements and available element settings.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz1.jpg"&gt;&lt;img width="729" height="333" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz1.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The screenshot above shows the default settings for the different elements. Since most valves and pumps are often used to define pressure zone boundaries, these are usually set to &amp;quot;Always Use&amp;quot;. You can also specify that general purpose valves (GPV), pipes and other elements define pressure zone boundaries. Note that while you can use pipes to define a boundary, the use of isolation valves associated with the pipe may be a better workflow, but the usage will be up to your engineering judgment.&lt;/p&gt;
&lt;p&gt;The Status Defaults will define all elements of a given type. However, if you have an individual element that will operate differently from the others of the same type, you can include an element override. Click the &amp;quot;Select from Drawing&amp;quot; button in the Element Override section of the Options tab and select the individual element. You can then change the &amp;quot;Use in Pressure Zone Trace&amp;quot; column to the setting you want to use.&lt;/p&gt;
&lt;p&gt;If you have a system that does not yet include valves or pumps and you want to see where the high and low pressures of your system are located, compute your model and then color code the pressure results to identify areas of high and low pressure. If you have an area of high pressure, you may want to add a PRV to reduce the pressure. If you have an area of low pressure, you may want to include a pump to add head to this part of the system.&lt;/p&gt;
&lt;p&gt;After you have added your elements or if you already have pumps and valves in a model, you can create a new pressure zone study by clicking the New button in the upper left of the manager. When you do this, you will need to choose a representative scenario for the study.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz2.jpg"&gt;&lt;img width="401" height="324" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz2.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The name of the new study will be the name of the representative scenario. Highlight the new pressure zone study. In the Zone Scope tab, you define the scope of the pressure zone study. The default is to use the entire network, you can also use a subset of the network by choose that option from the Scope Type pulldown menu.&lt;/p&gt;
&lt;h3&gt;Zone Representative Elements&lt;/h3&gt;
&lt;p&gt;You can now run the pressure zone identification part of the Pressure Zone manager. However, if you want to associate pressure zones identified with Zones in the Zone Manager, the bottom of the right pane is the place to make that association. Each Zone is associated with a Representative Element - that is, an element that you are certain will be in the pressure zone associated with the Zone. This way, after the pressure zones are calculated, you can easily export them to the model and follow the naming scheme used in your list of pressure zones. For example if you identify element J-1 as being in zone &amp;quot;A&amp;quot; and you make that association here, when you calculate pressure zones and choose to export, it will assign zone &amp;quot;A&amp;quot; to J-1 AND other nodes in the same calculated pressure zone as J-1.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz3.jpg"&gt;&lt;img width="740" height="344" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz3.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;h3&gt;Computing and Viewing Pressure Zone Results&lt;/h3&gt;
&lt;p&gt;To identify pressure zones in your system, click the Compute button in the upper left of the Pressure Zone manager, then select the Zone Results tab. This will show the pressure zones present in the system, including the elements in the pressure zone, the length of pipes, and boundary nodes (i.e., the elements separating the different zones). It also includes a color column, which can be used to visually represent the pressure zones in the drawing.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz4.jpg"&gt;&lt;img width="748" height="278" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz4.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;To see the color coding, click the &amp;quot;Highlight Pressure Zones&amp;quot; button, then move or minimize the Pressure Zone manager (Note: do not close the Pressure Zone manager as the color coding is only active when the Pressure Zone manager is open).&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz5.jpg"&gt;&lt;img width="700" height="454" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz5.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The screenshot above shows the three pressure zones in a example model. The green zone is upstream of a pump station in the upper left of the system. The second in blue is a pressure zone downstream of a few PRVs. The section in red is between the pumps and the PRVs. If the PRVs represented not a single pressure zone, as in this modeling case, but three different pressure zones, you can add isolation valves at boundaries for the pressure zones. When you re-compute the model and the pressure zone study, the pressure zones will then be further defined.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz6.jpg"&gt;&lt;img width="684" height="381" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz6.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;strong&gt;Note:&amp;nbsp;&lt;/strong&gt;The example model may be a good candidate for the use of a smaller scope than the entire network. The small pressure zone in the upper left is only the elements between the reservoir and the pumps. One could define a different scope that does not include the elements upstream of the pump and these would not be&amp;nbsp;used in the pressure zone study.&lt;/p&gt;
&lt;p&gt;In addition to visually identifying the pressure zones in the system, you can also generate a report with the data, export the pressure zones to the Zones manager, and zoom to individual pressure zones.&lt;/p&gt;
&lt;h3&gt;Flow Balance Tool&lt;/h3&gt;
&lt;p&gt;Another tool available in the Pressure Zone manager is the Flow Balance tool. To see information for the current time step in an EPS model run (or to see the results in a steady state simulation), click the Flow Balance Tool button and select &amp;quot;Current time step&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz7.jpg"&gt;&lt;img width="717" height="331" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz7.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;Here you will be able to see the demand in the different pressure zones as well as minimum and maximum hydraulic grades and pressures. This will allow to you&amp;nbsp;verify that the pressure results in different zones are reasonable.&lt;/p&gt;
&lt;p&gt;If you are looking at an EPS run, you can also identify the volume data for a system. After computing an EPS scenario and the pressure zone study for the EPS scenario, you can select the Flow Balance Tool and select &amp;quot;Volume&amp;quot;.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz8.jpg"&gt;&lt;img width="723" height="442" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz8.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;This will show the total volume of water used in different pressure zones in the system. This can be especially useful for doing water audits or water loss studies, and identifying areas of possible leakage or pipe breaks.&lt;/p&gt;
&lt;h3&gt;Identifying District Metering Areas&lt;/h3&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/25763.modeling-a-district-metered-area-dma"&gt;District Metering Areas &lt;/a&gt;may not necessary be areas with changes in pressure that are represented by valves and pumps. It is possible to define an area without the use of these types of elements.&amp;nbsp;&lt;/p&gt;
&lt;p&gt;DMAs often are bounded by meters. Typically the best element to represent a meter is a general purpose valve (GPV). You can place a GPV at the beginning of a DMA you want to define. You will need to identify a head vs flow curve for the GPV, but as meters typically see some head loss through the valve, that should not be a problem. The head vs flow curve you would use would simply be the curve expected for the meter in question.&lt;/p&gt;
&lt;p&gt;If you have multiple connections to a DMA, you would need another element to define the boundary. A good choice may be a PRV with an initial status of Closed and a pressure setting such that it will open when a certain pressure threshold is reached. Under normal conditions, flow would only go through the meter represented by the GPV, but if a high demand case occurs, such as a fire flow, the PRV will open when the pressure drops in the DMA.&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&lt;a href="https://communities.bentley.com/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pressure-zone-manager.mp4"&gt;communities.bentley.com/.../pressure-zone-manager.mp4&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;h1&gt;See Also&lt;/h1&gt;
&lt;p&gt;&amp;quot;Using the Pressure Zone Manager&amp;quot; (Help topic)&lt;/p&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/25763.modeling-a-district-metered-area-dma"&gt;Modeling a District Metered Area (DMA)&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/20108.using-the-auto-update-isolation-valve-data-option-in-the-pressure-zone-manager"&gt;Using the Auto Update Isolation Valve Data option in the Pressure Zone Manager&lt;/a&gt;&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;

&lt;div style="font-size: 90%;"&gt;Tags: Pressure Zone Manager, calibration, reviewed2017, Flow Balance, WaterGEMS, WaterCAD, pressure zone&lt;/div&gt;
</description></item><item><title>What is the pressure zone manager and what is it used for?</title><link>https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/11913/using-the-pressure-zone-manager/revision/7</link><pubDate>Mon, 16 May 2016 18:40:48 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:ae0982c4-6ddf-4d39-9dd7-60fdd1c081b8</guid><dc:creator>Scott Kampa</dc:creator><comments>https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/11913/using-the-pressure-zone-manager#comments</comments><description>Revision 7 posted to OpenFlows | Water Infrastructure Wiki by Scott Kampa on 5/16/2016 6:40:48 PM&lt;br /&gt;
&lt;h1&gt;&lt;b&gt;&lt;img width="189" height="60" style="border-width:0px;" alt=" " src="/cfs-file.ashx/__key/communityserver-components-sitefiles/TSG-Logo.png" /&gt;&lt;/b&gt;&lt;/h1&gt;
&lt;table align="left" style="border:0px solid #dce5f0;width:500px;background-color:#dce5f0;" border="0"&gt;
&lt;tbody&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;b&gt;&amp;nbsp;&lt;/b&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;b&gt;&amp;nbsp;&lt;/b&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;b&gt;&amp;nbsp;&lt;/b&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;span style="font-size:medium;"&gt;&lt;b&gt;Applies To&amp;nbsp;&lt;/b&gt;&lt;/span&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Product(s):&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Bentley WaterGEMS, Bentley WaterCAD&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Version(s):&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;08.11.xx.xx&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Environment:&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;N/A&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Area:&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Other&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Subarea:&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Original Author:&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Mark Pachlhofer, Bentley Technical Support Group&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/tbody&gt;
&lt;/table&gt;
&lt;p&gt;&lt;span style="font-size:2em;"&gt;Question&lt;/span&gt;&lt;/p&gt;
&lt;p&gt;What is the pressure zone manager and what is it used for?&lt;/p&gt;
&lt;h1&gt;Explanation&lt;/h1&gt;
&lt;p&gt;&lt;strong&gt;Please&amp;nbsp;see the video at the bottom for a quick demonstration.&lt;/strong&gt;&lt;/p&gt;
&lt;p&gt;Pressure zone manager automatically identifies pressure zones or district meter areas (DMA) in your model. This could be current pressure zones or in the identification and planning of future pressure zones you may want to create in a system.&lt;/p&gt;
&lt;p&gt;Note: While both pressure zones and DMAs can be identified in the pressure zone manager, for simplicity we will use the term &amp;quot;pressure zone&amp;quot; to represent these, even though not all DMAs are pressure zones and vice versa.&lt;/p&gt;
&lt;p&gt;Pressure zones are typically identified based on the location of pumps and valves in a system. However, it is also possible to define a pressure zone based on pipe that is closed or that has a check valve on it. To see the different elements that can be used to define pressure zones, open the Pressure Zone manager by going to Analysis &amp;gt; Pressure Zones. Select the Options tab to see the elements and available element settings.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz1.jpg"&gt;&lt;img width="729" height="333" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz1.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The screenshot above shows the default settings for the different elements. Since most valves and pumps are often used to define pressure zone boundaries, these are usually set to &amp;quot;Always Use&amp;quot;. A user can also define of general purpose valves (GPV) and pipes define pressure zone boundaries. Note that while you can use pipes to define a boundary, the use of isolations valves associated with the pipe may be a better workflow, but the usage will be up to your engineering judgment.&lt;/p&gt;
&lt;p&gt;The status defaults will define all elements of a given type. However, if you have an individual element that will operate differently from the others of the same type, you can include an element override. Click the &amp;quot;Select from Drawing&amp;quot; button in the Element Override section of the Options tab and select the individual element. You can then change the &amp;quot;Use in Pressure Zone Trace&amp;quot; column to the setting you want to use.&lt;/p&gt;
&lt;p&gt;If you have a system that does not yet include valves or pumps and you want to see where the high and low pressures of your system are located, compute your model and then color code the pressure results to identify areas of high and low pressure. If you have an area of high pressure, you may want to add a PRV to reduce the pressure. If you have an area of low pressure, you may want to include a pump to add head to this part of the system.&lt;/p&gt;
&lt;p&gt;After you have added your elements or if you already have pumps and valves in a model, you can create a new pressure zone study by clicking the New button in the upper left of the manager. When you do this, you will need to choose a representative scenario for the study.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz2.jpg"&gt;&lt;img width="401" height="324" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz2.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The name of the new study will be the name of the representative scenario. Highlight the new pressure zone study. In the Zone Scope tab, you define the scope the pressure zone study. The default is to use the entire network, you can also use a subset of the network by choose that option from the Scope Type pulldown menu. You can now run the pressure zone identification part of the Pressure Zone manager. However, if you want to associate pressure zones identified with Zones in the Zone Manager, the bottom of the right pane is the place to make that association. Each Zone is associated with a Representative Element - that is, an element that you are certain will be in the pressure zone associated with the Zone. This way, after the pressure zones are calculated, you can easily export them to the model and follow the naming scheme used in your list of pressure zones. For example if you identify element J-1 as being in zone &amp;quot;A&amp;quot; and you make that association here, when you calculate pressure zones and choose to export, it will assign zone &amp;quot;A&amp;quot; to J-1 AND other nodes in the same calculated pressure zone as J-1.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz3.jpg"&gt;&lt;img width="740" height="344" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz3.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;To identify pressure zones in your system, click the Compute button in the upper left of the Pressure Zone manager, then select the Zone Results tab. This will show the pressure zones present in the system, including the elements in the pressure zone, the length of pipes, and boundary nodes (i.e., the elements separating the different zones). It also includes a color column, which can be used to visually represent the pressure zones in the drawing.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz4.jpg"&gt;&lt;img width="748" height="278" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz4.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;To see the color coding, click the &amp;quot;Highlight Pressure Zones&amp;quot; button, then move or minimize the Pressure Zone manager (Note: do not close the Pressure Zone manager as the color coding is only active when the Pressure Zone manager is open).&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz5.jpg"&gt;&lt;img width="700" height="454" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz5.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The screenshot above those the three pressure zones in the sample model. The green zone is upstream of a pump station in the upper left of the system. The second in blue is a pressure zone downstream of a few PRVs. The section in red is between the pumps and the PRVs. If the PRVs represented not a single pressure zone, as in this modeling case, but three different pressure zones, you can add isolation valves at boundaries for the pressure zones. When you re-compute the model and the pressure zone study, the pressure zones will then be further defined.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz6.jpg"&gt;&lt;img width="684" height="381" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz6.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;strong&gt;Note:&amp;nbsp;&lt;/strong&gt;The sample model may be a good candidate for the use smaller scope than the entire network. The small pressure zone in the upper left in only the elements between the reservoir and the pumps. The user could define a different scope that does not include the elements upstream of the pump and these will not be&amp;nbsp;used in the pressure zone study.&lt;/p&gt;
&lt;p&gt;In addition to visually identifying the pressure zones in the system, you can also generate a report with the data, export the pressure zones to the Zones manager, and zoom to individual pressure zones.&lt;/p&gt;
&lt;p&gt;Another tool available in the Pressure Zone manager is the Flow Balance tool. To see information for the current time step in an EPS model run (or to see the results in a steady state simulation), click the Flow Balance Tool button and select &amp;quot;Current time step&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz7.jpg"&gt;&lt;img width="717" height="331" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz7.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;Here you will be able to see the demand in the different pressure zones as well as minimum and maximum hydraulic grades and pressures. This will allow to you&amp;nbsp;verify that the pressure results in different zones are reasonable.&lt;/p&gt;
&lt;p&gt;If you are looking at an EPS run, you can also identify the volume data for a system. After computing an EPS scenario and the pressure zone study for the EPS scenario, you can select the Flow Balance Tool and select &amp;quot;Volume&amp;quot;.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz8.jpg"&gt;&lt;img width="723" height="442" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz8.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;This will show the total volume of water used in different pressure zones in the system. This can be especially useful for doing water audits or water loss studies, and identifying areas of possible leakage or pipe breaks.&lt;/p&gt;
&lt;h3&gt;Identifying District Metering Areas&lt;/h3&gt;
&lt;p&gt;District Metering Areas may not necessary be areas with changes in pressure that are represented by valves and pumps. It is possible to define an area without the use of these types of elements.&amp;nbsp;&lt;/p&gt;
&lt;p&gt;DMAs often are bounded by meters. The best element to represent a meter is a general purpose valve (GPV). You can place a GPV at the beginning of a DMA you want to define. You will need to identify a head vs flow curve for the GPV, but as meters typically see some head loss through the valve, that should not be a problem. The head vs flow curve you would use would simply be the curve expected for the meter in question.&lt;/p&gt;
&lt;p&gt;If you have multiple connections to a DMA, you would need another element to define the boundary. A good choice may be a PRV with an initial status of Closed and a pressure setting such that it will open when a certain pressure threshold is reached. Under normal conditions, flow would only go through the meter represented by the GPV, but if a high demand case occurs, such as a fire flow, the PRV will open when the pressure drops in the DMA.&amp;nbsp;&lt;/p&gt;
&lt;p&gt;For additional information, please review the Help topic &amp;quot;Using the Pressure Zone Manager&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;a href="https://communities.bentley.com/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pressure-zone-manager.mp4"&gt;communities.bentley.com/.../pressure-zone-manager.mp4&lt;/a&gt;&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;

&lt;div style="font-size: 90%;"&gt;Tags: Bentley WaterCAD, Pressure Zone Manager, calibration, Generic, Bentley WaterGEMS, SELECTsupport, pressure zone&lt;/div&gt;
</description></item><item><title>What is the pressure zone manager and what is it used for?</title><link>https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/11913/using-the-pressure-zone-manager/revision/6</link><pubDate>Mon, 14 Dec 2015 19:28:46 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:ae0982c4-6ddf-4d39-9dd7-60fdd1c081b8</guid><dc:creator>MPachlhofer</dc:creator><comments>https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/11913/using-the-pressure-zone-manager#comments</comments><description>Revision 6 posted to OpenFlows | Water Infrastructure Wiki by MPachlhofer on 12/14/2015 7:28:46 PM&lt;br /&gt;
&lt;h1&gt;&lt;b&gt;&lt;img width="189" height="60" style="border-width:0px;" alt=" " src="/cfs-file.ashx/__key/communityserver-components-sitefiles/TSG-Logo.png" /&gt;&lt;/b&gt;&lt;/h1&gt;
&lt;table align="left" style="border:0px solid #dce5f0;width:500px;background-color:#dce5f0;" border="0"&gt;
&lt;tbody&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;b&gt;&amp;nbsp;&lt;/b&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;b&gt;&amp;nbsp;&lt;/b&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;b&gt;&amp;nbsp;&lt;/b&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;span style="font-size:medium;"&gt;&lt;b&gt;Applies To&amp;nbsp;&lt;/b&gt;&lt;/span&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Product(s):&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Bentley WaterGEMS, Bentley WaterCAD, Bentley HAMMER&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Version(s):&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;08.11.xx.xx&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Environment:&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;N/A&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Area:&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Other&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Subarea:&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Original Author:&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Mark Pachlhofer, Bentley Technical Support Group&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/tbody&gt;
&lt;/table&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&lt;span style="font-size:2em;"&gt;Question&lt;/span&gt;&lt;/p&gt;
&lt;p&gt;What is the pressure zone manager and what is it used for?&lt;/p&gt;
&lt;h1&gt;Explanation&lt;/h1&gt;
&lt;p&gt;&lt;strong&gt;Please&amp;nbsp;see the video at the bottom for a quick demonstration.&lt;/strong&gt;&lt;/p&gt;
&lt;p&gt;Pressure zone manager automatically identifies pressure zones or district meter areas (DMA) in your model. This could be current pressure zones or in the identification and planning of future pressure zones you may want to create in a system.&lt;/p&gt;
&lt;p&gt;Note: While both pressure zones and DMAs can be identified in the pressure zone manager, for simplicity we will use the term &amp;quot;pressure zone&amp;quot; to represent these, even though not all DMAs are pressure zones and vice versa.&lt;/p&gt;
&lt;p&gt;Pressure zones are typically identified based on the location of pumps and valves in a system. However, it is also possible to define a pressure zone based on pipe that is closed or that has a check valve on it. To see the different elements that can be used to define pressure zones, open the Pressure Zone manager by going to Analysis &amp;gt; Pressure Zones. Select the Options tab to see the elements and available element settings.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz1.jpg"&gt;&lt;img width="729" height="333" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz1.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The screenshot above shows the default settings for the different elements. Since most valves and pumps are often used to define pressure zone boundaries, these are usually set to &amp;quot;Always Use&amp;quot;. A user can also define of general purpose valves (GPV) and pipes define pressure zone boundaries. Note that while you can use pipes to define a boundary, the use of isolations valves associated with the pipe may be a better workflow, but the usage will be up to your engineering judgment.&lt;/p&gt;
&lt;p&gt;The status defaults will define all elements of a given type. However, if you have an individual element that will operate differently from the others of the same type, you can include an element override. Click the &amp;quot;Select from Drawing&amp;quot; button in the Element Override section of the Options tab and select the individual element. You can then change the &amp;quot;Use in Pressure Zone Trace&amp;quot; column to the setting you want to use.&lt;/p&gt;
&lt;p&gt;If you have a system that does not yet include valves or pumps and you want to see where the high and low pressures of your system are located, compute your model and then color code the pressure results to identify areas of high and low pressure. If you have an area of high pressure, you may want to add a PRV to reduce the pressure. If you have an area of low pressure, you may want to include a pump to add head to this part of the system.&lt;/p&gt;
&lt;p&gt;After you have added your elements or if you already have pumps and valves in a model, you can create a new pressure zone study by clicking the New button in the upper left of the manager. When you do this, you will need to choose a representative scenario for the study.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz2.jpg"&gt;&lt;img width="401" height="324" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz2.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The name of the new study will be the name of the representative scenario. Highlight the new pressure zone study. In the Zone Scope tab, you define the scope the pressure zone study. The default is to use the entire network, you can also use a subset of the network by choose that option from the Scope Type pulldown menu. You can now run the pressure zone identification part of the Pressure Zone manager. However, if you want to associate pressure zones identified with Zones in the Zone Manager, the bottom of the right pane is the place to make that association. Each Zone is associated with a Representative Element - that is, an element that you are certain will be in the pressure zone associated with the Zone. This way, after the pressure zones are calculated, you can easily export them to the model and follow the naming scheme used in your list of pressure zones. For example if you identify element J-1 as being in zone &amp;quot;A&amp;quot; and you make that association here, when you calculate pressure zones and choose to export, it will assign zone &amp;quot;A&amp;quot; to J-1 AND other nodes in the same calculated pressure zone as J-1.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz3.jpg"&gt;&lt;img width="740" height="344" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz3.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;To identify pressure zones in your system, click the Compute button in the upper left of the Pressure Zone manager, then select the Zone Results tab. This will show the pressure zones present in the system, including the elements in the pressure zone, the length of pipes, and boundary nodes (i.e., the elements separating the different zones). It also includes a color column, which can be used to visually represent the pressure zones in the drawing.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz4.jpg"&gt;&lt;img width="748" height="278" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz4.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;To see the color coding, click the &amp;quot;Highlight Pressure Zones&amp;quot; button, then move or minimize the Pressure Zone manager (Note: do not close the Pressure Zone manager as the color coding is only active when the Pressure Zone manager is open).&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz5.jpg"&gt;&lt;img width="700" height="454" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz5.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The screenshot above those the three pressure zones in the sample model. The green zone is upstream of a pump station in the upper left of the system. The second in blue is a pressure zone downstream of a few PRVs. The section in red is between the pumps and the PRVs. If the PRVs represented not a single pressure zone, as in this modeling case, but three different pressure zones, you can add isolation valves at boundaries for the pressure zones. When you re-compute the model and the pressure zone study, the pressure zones will then be further defined.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz6.jpg"&gt;&lt;img width="684" height="381" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz6.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;strong&gt;Note:&amp;nbsp;&lt;/strong&gt;The sample model may be a good candidate for the use smaller scope than the entire network. The small pressure zone in the upper left in only the elements between the reservoir and the pumps. The user could define a different scope that does not include the elements upstream of the pump and these will not be&amp;nbsp;used in the pressure zone study.&lt;/p&gt;
&lt;p&gt;In addition to visually identifying the pressure zones in the system, you can also generate a report with the data, export the pressure zones to the Zones manager, and zoom to individual pressure zones.&lt;/p&gt;
&lt;p&gt;Another tool available in the Pressure Zone manager is the Flow Balance tool. To see information for the current time step in an EPS model run (or to see the results in a steady state simulation), click the Flow Balance Tool button and select &amp;quot;Current time step&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz7.jpg"&gt;&lt;img width="717" height="331" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz7.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;Here you will be able to see the demand in the different pressure zones as well as minimum and maximum hydraulic grades and pressures. This will allow to you&amp;nbsp;verify that the pressure results in different zones are reasonable.&lt;/p&gt;
&lt;p&gt;If you are looking at an EPS run, you can also identify the volume data for a system. After computing an EPS scenario and the pressure zone study for the EPS scenario, you can select the Flow Balance Tool and select &amp;quot;Volume&amp;quot;.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz8.jpg"&gt;&lt;img width="723" height="442" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz8.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;This will show the total volume of water used in different pressure zones in the system. This can be especially useful for doing water audits or water loss studies, and identifying areas of possible leakage or pipe breaks.&lt;/p&gt;
&lt;h3&gt;Identifying District Metering Areas&lt;/h3&gt;
&lt;p&gt;District Metering Areas may not necessary be areas with changes in pressure that are represented by valves and pumps. It is possible to define an area without the use of these types of elements.&amp;nbsp;&lt;/p&gt;
&lt;p&gt;DMAs often are bounded by meters. The best element to represent a meter is a general purpose valve (GPV). You can place a GPV at the beginning of a DMA you want to define. You will need to identify a head vs flow curve for the GPV, but as meters typically see some head loss through the valve, that should not be a problem. The head vs flow curve you would use would simply be the curve expected for the meter in question.&lt;/p&gt;
&lt;p&gt;If you have multiple connections to a DMA, you would need another element to define the boundary. A good choice may be a PRV with an initial status of Closed and a pressure setting such that it will open when a certain pressure threshold is reached. Under normal conditions, flow would only go through the meter represented by the GPV, but if a high demand case occurs, such as a fire flow, the PRV will open when the pressure drops in the DMA.&amp;nbsp;&lt;/p&gt;
&lt;p&gt;For additional information, please review the Help topic &amp;quot;Using the Pressure Zone Manager&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;a href="https://communities.bentley.com/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pressure-zone-manager.mp4"&gt;communities.bentley.com/.../pressure-zone-manager.mp4&lt;/a&gt;&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;

&lt;div style="font-size: 90%;"&gt;Tags: Bentley WaterCAD, Pressure Zone Manager, calibration, Generic, Bentley WaterGEMS, SELECTsupport, pressure zone&lt;/div&gt;
</description></item><item><title>What is the pressure zone manager and what is it used for?</title><link>https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/11913/using-the-pressure-zone-manager/revision/5</link><pubDate>Mon, 14 Dec 2015 16:34:56 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:ae0982c4-6ddf-4d39-9dd7-60fdd1c081b8</guid><dc:creator>MPachlhofer</dc:creator><comments>https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/11913/using-the-pressure-zone-manager#comments</comments><description>Revision 5 posted to OpenFlows | Water Infrastructure Wiki by MPachlhofer on 12/14/2015 4:34:56 PM&lt;br /&gt;
&lt;h1&gt;&lt;b&gt;&lt;img width="189" height="60" style="border-width:0px;" alt=" " src="/cfs-file.ashx/__key/communityserver-components-sitefiles/TSG-Logo.png" /&gt;&lt;/b&gt;&lt;/h1&gt;
&lt;table align="left" style="border:0px solid #dce5f0;width:500px;background-color:#dce5f0;" border="0"&gt;
&lt;tbody&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;b&gt;&amp;nbsp;&lt;/b&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;b&gt;&amp;nbsp;&lt;/b&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;b&gt;&amp;nbsp;&lt;/b&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;span style="font-size:medium;"&gt;&lt;b&gt;Applies To&amp;nbsp;&lt;/b&gt;&lt;/span&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Product(s):&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Bentley WaterGEMS, Bentley WaterCAD, Bentley HAMMER&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Version(s):&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;08.11.xx.xx&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Environment:&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;N/A&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Area:&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Other&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Subarea:&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Original Author:&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Mark Pachlhofer, Bentley Technical Support Group&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/tbody&gt;
&lt;/table&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&lt;span style="font-size:2em;"&gt;Question&lt;/span&gt;&lt;/p&gt;
&lt;p&gt;What is the pressure zone manager and what is it used for?&lt;/p&gt;
&lt;h1&gt;Explanation&lt;/h1&gt;
&lt;p&gt;Pressure zone manager automatically identifies pressure zones or district meter areas (DMA) in your model. This could be current pressure zones or in the identification and planning of future pressure zones you may want to create in a system.&lt;/p&gt;
&lt;p&gt;Note: While both pressure zones and DMAs can be identified in the pressure zone manager, for simplicity we will use the term &amp;quot;pressure zone&amp;quot; to represent these, even though not all DMAs are pressure zones and vice versa.&lt;/p&gt;
&lt;p&gt;Pressure zones are typically identified based on the location of pumps and valves in a system. However, it is also possible to define a pressure zone based on pipe that is closed or that has a check valve on it. To see the different elements that can be used to define pressure zones, open the Pressure Zone manager by going to Analysis &amp;gt; Pressure Zones. Select the Options tab to see the elements and available element settings.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz1.jpg"&gt;&lt;img width="729" height="333" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz1.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The screenshot above shows the default settings for the different elements. Since most valves and pumps are often used to define pressure zone boundaries, these are usually set to &amp;quot;Always Use&amp;quot;. A user can also define of general purpose valves (GPV) and pipes define pressure zone boundaries. Note that while you can use pipes to define a boundary, the use of isolations valves associated with the pipe may be a better workflow, but the usage will be up to your engineering judgment.&lt;/p&gt;
&lt;p&gt;The status defaults will define all elements of a given type. However, if you have an individual element that will operate differently from the others of the same type, you can include an element override. Click the &amp;quot;Select from Drawing&amp;quot; button in the Element Override section of the Options tab and select the individual element. You can then change the &amp;quot;Use in Pressure Zone Trace&amp;quot; column to the setting you want to use.&lt;/p&gt;
&lt;p&gt;If you have a system that does not yet include valves or pumps and you want to see where the high and low pressures of your system are located, compute your model and then color code the pressure results to identify areas of high and low pressure. If you have an area of high pressure, you may want to add a PRV to reduce the pressure. If you have an area of low pressure, you may want to include a pump to add head to this part of the system.&lt;/p&gt;
&lt;p&gt;After you have added your elements or if you already have pumps and valves in a model, you can create a new pressure zone study by clicking the New button in the upper left of the manager. When you do this, you will need to choose a representative scenario for the study.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz2.jpg"&gt;&lt;img width="401" height="324" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz2.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The name of the new study will be the name of the representative scenario. Highlight the new pressure zone study. In the Zone Scope tab, you define the scope the pressure zone study. The default is to use the entire network, you can also use a subset of the network by choose that option from the Scope Type pulldown menu. You can now run the pressure zone identification part of the Pressure Zone manager. However, if you want to associate pressure zones identified with Zones in the Zone Manager, the bottom of the right pane is the place to make that association. Each Zone is associated with a Representative Element - that is, an element that you are certain will be in the pressure zone associated with the Zone. This way, after the pressure zones are calculated, you can easily export them to the model and follow the naming scheme used in your list of pressure zones. For example if you identify element J-1 as being in zone &amp;quot;A&amp;quot; and you make that association here, when you calculate pressure zones and choose to export, it will assign zone &amp;quot;A&amp;quot; to J-1 AND other nodes in the same calculated pressure zone as J-1.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz3.jpg"&gt;&lt;img width="740" height="344" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz3.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;To identify pressure zones in your system, click the Compute button in the upper left of the Pressure Zone manager, then select the Zone Results tab. This will show the pressure zones present in the system, including the elements in the pressure zone, the length of pipes, and boundary nodes (i.e., the elements separating the different zones). It also includes a color column, which can be used to visually represent the pressure zones in the drawing.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz4.jpg"&gt;&lt;img width="748" height="278" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz4.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;To see the color coding, click the &amp;quot;Highlight Pressure Zones&amp;quot; button, then move or minimize the Pressure Zone manager (Note: do not close the Pressure Zone manager as the color coding is only active when the Pressure Zone manager is open).&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz5.jpg"&gt;&lt;img width="700" height="454" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz5.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The screenshot above those the three pressure zones in the sample model. The green zone is upstream of a pump station in the upper left of the system. The second in blue is a pressure zone downstream of a few PRVs. The section in red is between the pumps and the PRVs. If the PRVs represented not a single pressure zone, as in this modeling case, but three different pressure zones, you can add isolation valves at boundaries for the pressure zones. When you re-compute the model and the pressure zone study, the pressure zones will then be further defined.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz6.jpg"&gt;&lt;img width="684" height="381" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz6.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;strong&gt;Note:&amp;nbsp;&lt;/strong&gt;The sample model may be a good candidate for the use smaller scope than the entire network. The small pressure zone in the upper left in only the elements between the reservoir and the pumps. The user could define a different scope that does not include the elements upstream of the pump and these will not be&amp;nbsp;used in the pressure zone study.&lt;/p&gt;
&lt;p&gt;In addition to visually identifying the pressure zones in the system, you can also generate a report with the data, export the pressure zones to the Zones manager, and zoom to individual pressure zones.&lt;/p&gt;
&lt;p&gt;Another tool available in the Pressure Zone manager is the Flow Balance tool. To see information for the current time step in an EPS model run (or to see the results in a steady state simulation), click the Flow Balance Tool button and select &amp;quot;Current time step&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz7.jpg"&gt;&lt;img width="717" height="331" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz7.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;Here you will be able to see the demand in the different pressure zones as well as minimum and maximum hydraulic grades and pressures. This will allow to you&amp;nbsp;verify that the pressure results in different zones are reasonable.&lt;/p&gt;
&lt;p&gt;If you are looking at an EPS run, you can also identify the volume data for a system. After computing an EPS scenario and the pressure zone study for the EPS scenario, you can select the Flow Balance Tool and select &amp;quot;Volume&amp;quot;.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz8.jpg"&gt;&lt;img width="723" height="442" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz8.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;This will show the total volume of water used in different pressure zones in the system. This can be especially useful for doing water audits or water loss studies, and identifying areas of possible leakage or pipe breaks.&lt;/p&gt;
&lt;h3&gt;Identifying District Metering Areas&lt;/h3&gt;
&lt;p&gt;District Metering Areas may not necessary be areas with changes in pressure that are represented by valves and pumps. It is possible to define an area without the use of these types of elements.&amp;nbsp;&lt;/p&gt;
&lt;p&gt;DMAs often are bounded by meters. The best element to represent a meter is a general purpose valve (GPV). You can place a GPV at the beginning of a DMA you want to define. You will need to identify a head vs flow curve for the GPV, but as meters typically see some head loss through the valve, that should not be a problem. The head vs flow curve you would use would simply be the curve expected for the meter in question.&lt;/p&gt;
&lt;p&gt;If you have multiple connections to a DMA, you would need another element to define the boundary. A good choice may be a PRV with an initial status of Closed and a pressure setting such that it will open when a certain pressure threshold is reached. Under normal conditions, flow would only go through the meter represented by the GPV, but if a high demand case occurs, such as a fire flow, the PRV will open when the pressure drops in the DMA.&amp;nbsp;&lt;/p&gt;
&lt;p&gt;For additional information, please review the Help topic &amp;quot;Using the Pressure Zone Manager&amp;quot;&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;

&lt;div style="font-size: 90%;"&gt;Tags: Bentley WaterCAD, Pressure Zone Manager, calibration, Generic, Bentley WaterGEMS, SELECTsupport, pressure zone&lt;/div&gt;
</description></item><item><title>What is the pressure zone manager and what is it used for?</title><link>https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/11913/using-the-pressure-zone-manager/revision/4</link><pubDate>Wed, 15 Jul 2015 17:45:33 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:ae0982c4-6ddf-4d39-9dd7-60fdd1c081b8</guid><dc:creator>Jesse Dringoli</dc:creator><comments>https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/11913/using-the-pressure-zone-manager#comments</comments><description>Revision 4 posted to OpenFlows | Water Infrastructure Wiki by Jesse Dringoli on 7/15/2015 5:45:33 PM&lt;br /&gt;
&lt;h1&gt;&lt;b&gt;&lt;img width="189" height="60" style="border-width:0px;" alt=" " src="/cfs-file.ashx/__key/communityserver-components-sitefiles/TSG-Logo.png" /&gt;&lt;/b&gt;&lt;/h1&gt;
&lt;table align="left" style="border:0px solid #dce5f0;width:500px;background-color:#dce5f0;" border="0"&gt;
&lt;tbody&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;b&gt;&amp;nbsp;&lt;/b&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;b&gt;&amp;nbsp;&lt;/b&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;b&gt;&amp;nbsp;&lt;/b&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;span style="font-size:medium;"&gt;&lt;b&gt;Applies To&amp;nbsp;&lt;/b&gt;&lt;/span&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Product(s):&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Bentley WaterGEMS, Bentley WaterCAD, Bentley HAMMER&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Version(s):&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;08.11.xx.xx&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Environment:&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;N/A&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Area:&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Other&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Subarea:&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Original Author:&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Mark Pachlhofer, Bentley Technical Support Group&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/tbody&gt;
&lt;/table&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&lt;span style="font-size:2em;"&gt;Question&lt;/span&gt;&lt;/p&gt;
&lt;p&gt;What is the pressure zone manager and what is it used for?&lt;/p&gt;
&lt;h1&gt;Explanation&lt;/h1&gt;
&lt;p&gt;Pressure zone manager automatically identifies pressure zones or district meter areas (DMA) in your model. This could be current pressure zones or in the identification and planning of future pressure zones you may want to create in a system.&lt;/p&gt;
&lt;p&gt;Note: While both pressure zones and DMAs can be identified in the pressure zone manager, for simplicity we will use the term &amp;quot;pressure zone&amp;quot; to represent these, even though not all DMAs are pressure zones and vice versa.&lt;/p&gt;
&lt;p&gt;Pressure zones are typically identified based on the location of pumps and valves in a system. However, it is also possible to define a pressure zone based on pipe that is closed or that has a check valve on it. To see the different elements that can be used to define pressure zones, open the Pressure Zone manager by going to Analysis &amp;gt; Pressure Zones. Select the Options tab to see the elements and available element settings.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz1.jpg"&gt;&lt;img width="729" height="333" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz1.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The screenshot above shows the default settings for the different elements. Since most valves and pump are often used to define pressure zone boundaries, theses are usually set to &amp;quot;Always Use&amp;quot;. A user can also define of general purpose valves (GPV) and pipes define pressure zone boundaries. Note that while you can use pipes to define a boundary, the use of isolations valves associated with the pipe may be a better workflow, but the usage will be up to your engineering judgment.&lt;/p&gt;
&lt;p&gt;The status defaults will define all elements of a given type. However, if you have an individual element that will operate differently from the others of the same type, you can include an element override. Click the &amp;quot;Select from Drawing&amp;quot; button in the Element Override section of the Options tab and select the indivdual element. You can then change the &amp;quot;Use in Pressure Zone Trace&amp;quot; column to the setting you want to use.&lt;/p&gt;
&lt;p&gt;If you have a system that does not yet include valves or pumps and you want to see where the high and low pressures of your system are located, compute your model and then color code the pressure results to identify areas of high and low pressure. If you have an area of high pressure, you may want to add a PRV to reduce the pressure. If you have an area of low pressure, you may want to include a pump to add head to this part of the system.&lt;/p&gt;
&lt;p&gt;After you have added your elements or if you already have pumps and valves in a model, you can create a new pressure zone study by clicking the New button in the upper left of the manager. When you do this, you will need to choose a representative scenario for the study.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz2.jpg"&gt;&lt;img width="401" height="324" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz2.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The name of the new study will be the name of the representative scenario. Highlight the new pressure zone study. In the Zone Scope tab, you define the scope the pressure zone study. The default is to use the entire network, you can also use a subset of the network by choose that option from the Scope Type pulldown menu. You can now run the pressure zone identification part of the Pressure Zone manager. However, if you want to associate pressure zones identified with Zones in the Zone Manager, the bottom of the right pane is the place to make that association. Each Zone is associated with a Representative Element - that is, an element that you are certain will be in the pressure zone associated with the Zone. This way, after the pressure zones are calculated, you can easily export them to the model and follow the naming scheme used in your list of pressure zones. For example if you identify element J-1 as being in zone &amp;quot;A&amp;quot; and you make that association here, when you calculate pressure zones and choose to export, it will assign zone &amp;quot;A&amp;quot; to J-1 AND other nodes in the same calculated pressure zone as J-1.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz3.jpg"&gt;&lt;img width="740" height="344" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz3.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;To identify pressure zones in your system, click the Compute button in the upper left of the Pressure Zone manager, then select the Zone Results tab. This will show the pressure zones present in the system, including the elements in the pressure zone, the length of pipes, and boundary nodes (i.e., the elements separating the different zones). It also includes a color column, which can be used to visually represent the pressure zones in the drawing.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz4.jpg"&gt;&lt;img width="748" height="278" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz4.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;To see the color coding, click the &amp;quot;Highlight Pressure Zones&amp;quot; button, then move or minimize the Pressure Zone manager (Note: do not close the Pressure Zone manager as the color coding is only active when the Pressure Zone manager is open).&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz5.jpg"&gt;&lt;img width="700" height="454" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz5.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The screenshot above those the three pressure zones in the sample model. The green zone is upstream of a pump station in the upper left of the system. The second in blue is a pressure zone downstream of a few PRVs. The section in red is between the pumps and the PRVs. If the PRVs represented not a single pressure zone, as in this modeling case, but three different pressure zones, you can add isolation valves at boundaries for the pressure zones. When you recompute the model and the pressure zone study, the pressure zones will then be further defined.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz6.jpg"&gt;&lt;img width="684" height="381" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz6.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;strong&gt;Note:&amp;nbsp;&lt;/strong&gt;The sample model may be a good candidate for the use smaller scope than the entire network. The small pressure zone in the upper left in only the elements between the reservoir and the pumps. The user could define a different scope that does not include the elements upstream of the pump and these will not used in the pressure zone study.&lt;/p&gt;
&lt;p&gt;In addition to visually identifying the pressure zones in the system, you can also generate a report with the data, export the pressure zones to the Zones manager, and zoom to individual pressure zones.&lt;/p&gt;
&lt;p&gt;Another tool available in the Pressure Zone manager is the Flow Balance tool. To see information for the current time step in an EPS model run (or to see the results in a steady state simulation), click the Flow Balance Tool button and select &amp;quot;Current time step&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz7.jpg"&gt;&lt;img width="717" height="331" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz7.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;Here you will be able to see the demand in the different pressure zones as well as minimum and maximum hydraulic grades and pressures. This will allow to verify that the pressure results in different zones are reasonable.&lt;/p&gt;
&lt;p&gt;If you are looking at an EPS run, you can also identify the volume data for a system. After computing an EPS scenario and the pressure zone study for the EPS scenario, you can select the Flow Balance Tool and select &amp;quot;Volume&amp;quot;.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz8.jpg"&gt;&lt;img width="723" height="442" alt=" " src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz8.jpg" /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;This will show the total volume of water used in different pressure zones in the system. This can be especially useful for doing water audits or water loss studies, and identifying areas of possible leakage or pipe breaks.&lt;/p&gt;
&lt;h3&gt;Identifying District Metering Areas&lt;/h3&gt;
&lt;p&gt;District Metering Areas may not necessary be areas with changes in pressure that are represented by valves and pumps. It is possible to define an area without the use of these types of elements.&amp;nbsp;&lt;/p&gt;
&lt;p&gt;DMAs often are bounded by meters. The best element to represent a meter is a general purpose valve (GPV). You can place a GPV at the beginning of a DMA you want to define. You will need to identify a head vs flow curve for the GPV, but as meters typically see some headloss through the valve, that should not be a problem. The head vs flow curve you would use would simply be the curve expected for the meter in question.&lt;/p&gt;
&lt;p&gt;If you have multiple connections to a DMA, you would need another element to define the boundary. A good choice may be a PRV with an initial status of Closed and a pressure setting such that it will open when a certain pressure threshold is reached. Under normal conditions, flow would only go through the meter represented by the GPV, but if a high demand case occurs, such as a fire flow, the PRV will open when the pressure drops in the DMA.&amp;nbsp;&lt;/p&gt;
&lt;p&gt;For additional information, please review the Help topic &amp;quot;Using the Pressure Zone Manager&amp;quot;&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;

&lt;div style="font-size: 90%;"&gt;Tags: Bentley WaterCAD, Pressure Zone Manager, calibration, Generic, Bentley WaterGEMS, SELECTsupport, pressure zone&lt;/div&gt;
</description></item><item><title>What is the pressure zone manager and what is it used for?</title><link>https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/11913/using-the-pressure-zone-manager/revision/3</link><pubDate>Wed, 08 Apr 2015 18:20:00 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:ae0982c4-6ddf-4d39-9dd7-60fdd1c081b8</guid><dc:creator>Scott Kampa</dc:creator><comments>https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/11913/using-the-pressure-zone-manager#comments</comments><description>Revision 3 posted to OpenFlows | Water Infrastructure Wiki by Scott Kampa on 4/8/2015 6:20:00 PM&lt;br /&gt;
&lt;h1&gt;&lt;b&gt;&lt;img width="189" height="60" style="border-width:0px;" alt=" " src="/cfs-file.ashx/__key/communityserver-components-sitefiles/TSG-Logo.png" /&gt;&lt;/b&gt;&lt;/h1&gt;
&lt;table align="left" style="border:0px solid #dce5f0;width:500px;background-color:#dce5f0;" border="0"&gt;
&lt;tbody&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;b&gt;&amp;nbsp;&lt;/b&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;b&gt;&amp;nbsp;&lt;/b&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;b&gt;&amp;nbsp;&lt;/b&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;span style="font-size:medium;"&gt;&lt;b&gt;Applies To&amp;nbsp;&lt;/b&gt;&lt;/span&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Product(s):&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Bentley WaterGEMS, Bentley WaterCAD, Bentley HAMMER&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Version(s):&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;08.11.xx.xx&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Environment:&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;N/A&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Area:&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Other&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Subarea:&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Original Author:&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Mark Pachlhofer, Bentley Technical Support Group&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/tbody&gt;
&lt;/table&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&lt;span style="font-size:2em;"&gt;Question&lt;/span&gt;&lt;/p&gt;
&lt;p&gt;What is the pressure zone manager and what is it used for?&lt;/p&gt;
&lt;h1&gt;Explanation&lt;/h1&gt;
&lt;p&gt;Pressure zone manager automatically identifies pressure zones or district meter areas (DMA) in your model. This could be current pressure zones or in the identification and planning of future pressure zones you may want to create in a system.&lt;/p&gt;
&lt;p&gt;Note: While both pressure zones and DMAs can be identified in the pressure zone manager, for simplicity we will use the term &amp;quot;pressure zone&amp;quot; to represent these, even though not all DMAs are pressure zones and vice versa.&lt;/p&gt;
&lt;p&gt;Pressure zones are typically identified based on the location of pumps and valves in a system. However, it is also possible to define a pressure zone based on pipe that is closed or that has a check valve on it. To see the different elements that can be used to define pressure zones, open the Pressure Zone manager by going to Analysis &amp;gt; Pressure Zones. Select the Options tab to see the elements and available element settings.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz1.jpg"&gt;&lt;img src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz1.jpg" width="729" height="333" alt=" " /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The screenshot above shows the default settings for the different elements. Since most valves and pump are often used to define pressure zone boundaries, theses are usually set to &amp;quot;Always Use&amp;quot;. A user can also define of general purpose valves (GPV) and pipes define pressure zone boundaries. Note that while you can use pipes to define a boundary, the use of isolations valves associated with the pipe may be a better workflow, but the usage will be up to your engineering judgment.&lt;/p&gt;
&lt;p&gt;The status defaults will define all elements of a given type. However, if you have an individual element that will operate differently from the others of the same type, you can include an element override. Click the &amp;quot;Select from Drawing&amp;quot; button in the Element Override section of the Options tab and select the indivdual element. You can then change the &amp;quot;Use in Pressure Zone Trace&amp;quot; column to the setting you want to use.&lt;/p&gt;
&lt;p&gt;If you have a system that does not yet include valves or pumps and you want to see where the high and low pressures of your system are located, compute your model and then color code the pressure results to identify areas of high and low pressure. If you have an area of high pressure, you may want to add a PRV to reduce the pressure. If you have an area of low pressure, you may want to include a pump to add head to this part of the system.&lt;/p&gt;
&lt;p&gt;After you have added your elements or if you already have pumps and valves in a model, you can create a new pressure zone study by clicking the New button in the upper left of the manager. When you do this, you will need to choose a representative scenario for the study.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz2.jpg"&gt;&lt;img src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz2.jpg" width="401" height="324" alt=" " /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The name of the new study will be the name of the representative scenario. Highlight the new pressure zone study. In the Zone Scope tab, you define the scope the pressure zone study. The default is to use the entire network, you can also use a subset of the network by choose that option from the Scope Type pulldown menu. You can now run the pressure zone identification part of the Pressure Zone manager. However, if you want to associate pressure zones identified with Zones in the Zone Manager, the bottom of the right pane is the place to make that association. Each Zone is associated with a Representative Element - that is, an element that you are certain will be in the pressure zone associated with the Zone.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz3.jpg"&gt;&lt;img src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz3.jpg" width="740" height="344" alt=" " /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;To identify pressure zones in your system, click the Compute button in the upper left of the Pressure Zone manager, then select the Zone Results tab. This will show the pressure zones present in the system, including the elements in the pressure zone, the length of pipes, and boundary nodes (i.e., the elements separating the different zones). It also includes a color column, which can be used to visually represent the pressure zones in the drawing.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz4.jpg"&gt;&lt;img src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz4.jpg" width="748" height="278" alt=" " /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;To see the color coding, click the &amp;quot;Highlight Pressure Zones&amp;quot; button, then move or minimize the Pressure Zone manager (Note: do not close the Pressure Zone manager as the color coding is only active when the Pressure Zone manager is open).&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz5.jpg"&gt;&lt;img src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz5.jpg" width="700" height="454" alt=" " /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;The screenshot above those the three pressure zones in the sample model. The green zone is upstream of a pump station in the upper left of the system. The second in blue is a pressure zone downstream of a few PRVs. The section in red is between the pumps and the PRVs. If the PRVs represented not a single pressure zone, as in this modeling case, but three different pressure zones, you can add isolation valves at boundaries for the pressure zones. When you recompute the model and the pressure zone study, the pressure zones will then be further defined.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz6.jpg"&gt;&lt;img src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz6.jpg" width="684" height="381" alt=" " /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;strong&gt;Note:&amp;nbsp;&lt;/strong&gt;The sample model may be a good candidate for the use smaller scope than the entire network. The small pressure zone in the upper left in only the elements between the reservoir and the pumps. The user could define a different scope that does not include the elements upstream of the pump and these will not used in the pressure zone study.&lt;/p&gt;
&lt;p&gt;In addition to visually identifying the pressure zones in the system, you can also generate a report with the data, export the pressure zones to the Zones manager, and zoom to individual pressure zones.&lt;/p&gt;
&lt;p&gt;Another tool available in the Pressure Zone manager is the Flow Balance tool. To see information for the current time step in an EPS model run (or to see the results in a steady state simulation), click the Flow Balance Tool button and select &amp;quot;Current time step&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz7.jpg"&gt;&lt;img src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz7.jpg" width="717" height="331" alt=" " /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;Here you will be able to see the demand in the different pressure zones as well as minimum and maximum hydraulic grades and pressures. This will allow to verify that the pressure results in different zones are reasonable.&lt;/p&gt;
&lt;p&gt;If you are looking at an EPS run, you can also identify the volume data for a system. After computing an EPS scenario and the pressure zone study for the EPS scenario, you can select the Flow Balance Tool and select &amp;quot;Volume&amp;quot;.&lt;/p&gt;
&lt;p&gt;&lt;a href="/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-32/pz8.jpg"&gt;&lt;img src="/resized-image/__size/940x0/__key/communityserver-wikis-components-files/00-00-00-00-32/pz8.jpg" width="723" height="442" alt=" " /&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;This will show the total volume of water used in different pressure zones in the system. This can be especially useful for doing water audits or water loss studies, and identifying areas of possible leakage or pipe breaks.&lt;/p&gt;
&lt;h3&gt;Identifying District Metering Areas&lt;/h3&gt;
&lt;p&gt;District Metering Areas may not necessary be areas with changes in pressure that are represented by valves and pumps. It is possible to define an area without the use of these types of elements.&amp;nbsp;&lt;/p&gt;
&lt;p&gt;DMAs often are bounded by meters. The best element to represent a meter is a general purpose valve (GPV). You can place a GPV at the beginning of a DMA you want to define. You will need to identify a head vs flow curve for the GPV, but as meters typically see some headloss through the valve, that should not be a problem. The head vs flow curve you would use would simply be the curve expected for the meter in question.&lt;/p&gt;
&lt;p&gt;If you have multiple connections to a DMA, you would need another element to define the boundary. A good choice may be a PRV with an initial status of Closed and a pressure setting such that it will open when a certain pressure threshold is reached. Under normal conditions, flow would only go through the meter represented by the GPV, but if a high demand case occurs, such as a fire flow, the PRV will open when the pressure drops in the DMA.&amp;nbsp;&lt;/p&gt;
&lt;p&gt;For additional information, please review the Help topic &amp;quot;Using the Pressure Zone Manager&amp;quot;&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;

&lt;div style="font-size: 90%;"&gt;Tags: Bentley WaterCAD, Pressure Zone Manager, calibration, Generic, Bentley WaterGEMS, SELECTsupport, pressure zone&lt;/div&gt;
</description></item><item><title>What is the pressure zone manager and what is it used for?</title><link>https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/11913/using-the-pressure-zone-manager/revision/2</link><pubDate>Mon, 03 Feb 2014 16:44:44 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:ae0982c4-6ddf-4d39-9dd7-60fdd1c081b8</guid><dc:creator>MPachlhofer</dc:creator><comments>https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/11913/using-the-pressure-zone-manager#comments</comments><description>Revision 2 posted to OpenFlows | Water Infrastructure Wiki by MPachlhofer on 2/3/2014 4:44:44 PM&lt;br /&gt;
&lt;h1&gt;&lt;b&gt;&lt;img width="189" height="60" style="border-width:0px;" alt=" " src="http://communities.bentley.com/cfs-file.ashx/__key/communityserver-components-sitefiles/TSG-Logo.png" /&gt;&lt;/b&gt;&lt;/h1&gt;
&lt;table align="left" style="border:0px solid #dce5f0;width:500px;background-color:#dce5f0;" border="0"&gt;
&lt;tbody&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;b&gt;&amp;nbsp;&lt;/b&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;b&gt;&amp;nbsp;&lt;/b&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;b&gt;&amp;nbsp;&lt;/b&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;span style="font-size:medium;"&gt;&lt;b&gt;Applies To&amp;nbsp;&lt;/b&gt;&lt;/span&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Product(s):&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Bentley WaterGEMS, Bentley WaterCAD, Bentley HAMMER&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Version(s):&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;08.11.04.58&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Environment:&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;N/A&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Area:&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Other&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Subarea:&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Original Author:&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Mark Pachlhofer, Bentley Technical Support Group&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/tbody&gt;
&lt;/table&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;h1&gt;&amp;nbsp;&lt;/h1&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;h1&gt;Question&lt;/h1&gt;
&lt;p&gt;What is the pressure zone manager and what is it used for?&lt;/p&gt;
&lt;h1&gt;Explanation&lt;/h1&gt;
&lt;p&gt;Pressure zone manager automatically identifies pressure zones in your model. It is great in calibration to verify that your model matches actual pressure zone boundaries. It is also great for planning future pressure zones and their boundaries.&lt;/p&gt;
&lt;p&gt;With the flow balanacing tool, you get a nice summary in inflows and outflow and water use in any zone as well as the range of pressures and HGLs at nodes in the each zone.&lt;/p&gt;
&lt;p&gt;This can be very useful in dealing with systems&amp;nbsp;that have&amp;nbsp;multiple pressure zones or district meter areas.&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;

&lt;div style="font-size: 90%;"&gt;Tags: Bentley WaterCAD, Pressure Zone Manager, calibration, Generic, Bentley WaterGEMS, SELECTsupport, pressure zone&lt;/div&gt;
</description></item><item><title>What is pressure zone manager and what is it used for?</title><link>https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/11913/using-the-pressure-zone-manager/revision/1</link><pubDate>Mon, 03 Feb 2014 16:27:39 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:ae0982c4-6ddf-4d39-9dd7-60fdd1c081b8</guid><dc:creator>MPachlhofer</dc:creator><comments>https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/11913/using-the-pressure-zone-manager#comments</comments><description>Revision 1 posted to OpenFlows | Water Infrastructure Wiki by MPachlhofer on 2/3/2014 4:27:39 PM&lt;br /&gt;
&lt;h1&gt;&lt;b&gt;&lt;img style="border-width:0px;" src="http://communities.bentley.com/cfs-file.ashx/__key/communityserver-components-sitefiles/TSG-Logo.png" width="189" height="60" alt=" " /&gt;&lt;/b&gt;&lt;/h1&gt;
&lt;table style="border:0px solid #dce5f0;width:500px;background-color:#dce5f0;" border="0" align="left"&gt;
&lt;tbody&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;b&gt;&amp;nbsp;&lt;/b&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;b&gt;&amp;nbsp;&lt;/b&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;b&gt;&amp;nbsp;&lt;/b&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;span style="font-size:medium;"&gt;&lt;b&gt;Applies To&amp;nbsp;&lt;/b&gt;&lt;/span&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Product(s):&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Bentley WaterGEMS&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Version(s):&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;08.11.04.58&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Environment:&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;N/A&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Area:&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Other&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Subarea:&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt; &lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;Original Author:&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;Mark Pachlhofer, Bentley Technical Support Group&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td style="text-align:right;"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/tbody&gt;
&lt;/table&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;h1&gt;&amp;nbsp;&lt;/h1&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;

&lt;p&gt;XXXXXXX(Provide and introduction/overview of the article contents)XXXXXXX&lt;/p&gt;
&lt;h1&gt;XXXXXXX(Heading 1)XXXXXXX&lt;/h1&gt;
&lt;p&gt;XXXXXXX(Article body)XXXXXXX&lt;/p&gt;
&lt;h1&gt;See Also&lt;/h1&gt;
&lt;p&gt;XXXXXXX(Add links as needed for other relevant Be Communities content.)XXXXXXX&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;

&lt;div style="font-size: 90%;"&gt;Tags: Pressure Zone Manager, Generic, Bentley WaterGEMS, SELECTsupport, pressure zone, Other&lt;/div&gt;
</description></item></channel></rss>