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<?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>Khalid Hilu's Activities</title><link>https://communities.bentley.com/members/8084fdfd_2d00_67d9_2d00_4a57_2d00_a3f9_2d00_86e88c74e015</link><description>Khalid Hilu's recent activity</description><dc:language>en-US</dc:language><generator>Telligent Community 12</generator><item><title>Hydrogen Sulfide Modeling In SewerGems</title><link>https://communities.bentley.com/products/hydraulics___hydrology/f/haestad-hydraulics-and-hydrology-forum/189969/hydrogen-sulfide-modeling-in-sewergems</link><pubDate>Fri, 13 Dec 2019 19:10:45 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:64c619b7-dcca-4289-8ee7-aa6dda84f517</guid><dc:creator>Khalid Hilu</dc:creator><description>&lt;p&gt;Dear All ,&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;Kindly i have a question , and i am a little bit confused about H2s Calculations in sewer gems.&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;First Of all i have seen this article and it understand it well :&lt;/p&gt;
&lt;p&gt;&lt;a title="Modeling septicity / hydrogen sulfide (H2S)" href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/35136/modeling-septicity-hydrogen-sulfide-h2s" rel="noopener noreferrer" target="_blank"&gt;Modeling septicity / hydrogen sulfide (H2S)&lt;/a&gt;&amp;nbsp;.&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;In this article i understand that SewerGems uses&amp;nbsp;Pomeroy Parkhurst Equation to predict H2S formation&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;&lt;img alt="Pomeroy Parkhurst Equation" src="/resized-image/__size/320x240/__key/communityserver-discussions-components-files/5925/Equation.PNG" /&gt;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;&lt;img alt=" " src="/resized-image/__size/320x240/__key/communityserver-discussions-components-files/5925/Equation2.PNG" /&gt;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;Then i want to verify if that formula is really used inside the Sewer-gems . what i did is make a simple model consist of 1 line only and compare the result from sewer-gems with result from excel sheet using&amp;nbsp;Pomeroy Parkhurst Equation .&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;Result from model is shown below and data from model is shown below&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&lt;img alt="Data 2" src="/resized-image/__size/680x174/__key/communityserver-discussions-components-files/5925/Data-1.PNG" /&gt;&amp;nbsp; &amp;nbsp; &amp;nbsp; &amp;nbsp; &amp;nbsp; &amp;nbsp; &amp;nbsp; &amp;nbsp; &amp;nbsp; &amp;nbsp; &amp;nbsp; &amp;nbsp; &amp;nbsp; &amp;nbsp; &amp;nbsp;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;&lt;img alt="Data 2" src="/resized-image/__size/680x460/__key/communityserver-discussions-components-files/5925/Data-2.PNG" /&gt;&amp;nbsp; &amp;nbsp;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;The Sewergem model based on the above data give me a H2s result = 0.16487 mg/l&amp;nbsp;&lt;/p&gt;
&lt;p&gt;using excel sheet and applying&amp;nbsp;Pomeroy Parkhurst Equation on the above data that i get from sewer gems , then unforuntly i did not get the same result !!!?&lt;/p&gt;
&lt;p&gt;is there is some thing wrong inside sewer-gems programming , is sewer gems does not use the same formula or did i make a mistake&amp;nbsp; ?&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;this is the result from the excel sheet i get H2S = 0.1114 mg/l&lt;/p&gt;
&lt;p&gt;&lt;img alt=" " src="/resized-image/__size/680x460/__key/communityserver-discussions-components-files/5925/2055.Excel.PNG" /&gt;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;Sewergems model is here&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&lt;a href="https://communities.bentley.com/cfs-file/__key/communityserver-discussions-components-files/5925/H2s-Model.rar"&gt;communities.bentley.com/.../H2s-Model.rar&lt;/a&gt;&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>Equation Used In Hydrogen Sulfide (H2S) Modeling In SewerGems</title><link>https://communities.bentley.com/products/hydraulics___hydrology/f/haestad-hydraulics-and-hydrology-forum/189988/equation-used-in-hydrogen-sulfide-h2s-modeling-in-sewergems</link><pubDate>Sat, 14 Dec 2019 20:33:08 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:a1566ed2-b7f0-4051-bf2b-048007d5f74f</guid><dc:creator>Khalid Hilu</dc:creator><description>&lt;p&gt;Dear All ,&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;Kindly i have a question , and i am a little bit confused about H2s Calculations in sewer gems.&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;First Of all i have seen this article and it understand it well :&lt;/p&gt;
&lt;p&gt;&lt;a title="Modeling septicity / hydrogen sulfide (H2S)" href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/35136/modeling-septicity-hydrogen-sulfide-h2s" rel="noopener noreferrer" target="_blank"&gt;Modeling septicity / hydrogen sulfide (H2S)&lt;/a&gt;&amp;nbsp;.]&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;I tried make a comparison between result from SewerGems and an excel sheet with the equation that mentioned in this article but the problem is that the result does not match .&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;My question is does SewerGEMS use the following equation below euqation or not ?&lt;/p&gt;
&lt;p&gt;&lt;img alt=" " src="/resized-image/__size/640x240/__key/communityserver-discussions-components-files/5925/e1.PNG" /&gt;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;&lt;img alt=" " src="/resized-image/__size/640x240/__key/communityserver-discussions-components-files/5925/e2.PNG" /&gt;&lt;/p&gt;
&lt;p&gt;i need to know what the exact formula that sewer gems uses in calculating the H2S out ?&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>Hydrogen Sulfide Modeling in Sewergems</title><link>https://communities.bentley.com/products/hydraulics___hydrology/f/haestad-hydraulics-and-hydrology-forum/175459/hydrogen-sulfide-modeling-in-sewergems</link><pubDate>Thu, 21 Feb 2019 12:08:45 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:598727bc-878f-45c7-8395-aa9d157e7ba5</guid><dc:creator>Khalid Hilu</dc:creator><description>&lt;p&gt;Dear Folks ,&amp;nbsp;&lt;br /&gt;&lt;br /&gt;I have run a model with Hydrogen sulfide analysis , after made the analysis i got the result for H2s in and out concentration&amp;nbsp; , my question is : do we have a limit for H2S concentration in sewer pipe line ?? or do we have a code or standard that have limits for H2S concentration&amp;nbsp; ??&lt;/p&gt;
&lt;p&gt;is the concentration limit depend on pipe material type , and what is the limit for each pipe material ??&lt;br /&gt;&lt;br /&gt;Thank you all&amp;nbsp;&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>hydraulic grade line</title><link>https://communities.bentley.com/products/hydraulics___hydrology/f/haestad-hydraulics-and-hydrology-forum/174120/hydraulic-grade-line</link><pubDate>Wed, 23 Jan 2019 12:30:19 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:9fd4086b-f48d-4eec-ba78-3a13e3f5c02d</guid><dc:creator>Khalid Hilu</dc:creator><description>&lt;p&gt;Hello Folks ,&amp;nbsp;&lt;br /&gt;&lt;br /&gt;Kindly i have a question related to Sewer-gems Software , my question is about the&amp;nbsp;hydraulic grade line in a sewer networks that modeled throughout Sewer gems or sewer cad .&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;The Hydraulic grade lines have a small jump before manhole entrance , even-though the inlet pipe and outlet pipe has the same : diameter , flow , slope , partial full flow percent&lt;br /&gt;my question why this small jump happens ??&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;&lt;img alt=" " src="/resized-image/__size/1040x1080/__key/communityserver-discussions-components-files/5925/2c2.png" /&gt;&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>Ask A Question I</title><link>https://communities.bentley.com/achievements/460ac7df-7ccc-4c42-a204-9e05eef3be09</link><pubDate>Wed, 23 Jan 2019 03:36:16 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:46cdcbda-4681-4fd9-aa3b-5dce654368c8</guid><dc:creator /><description>Ask a question in a forum.</description></item></channel></rss>