OpenFlows | Water Infrastructure
OpenFlows | Water Infrastructure Wiki
Specific Speed and Pump Flow Calculations for a Transient Simulation
OpenFlows | Water infrastructure Wiki
"Calculation cancelled by user" when attempting to compute transient simulation in HAMMER
Calculations - Bentley HAMMER
Combine, save and export profiles and graphs from the HAMMER transient results viewer
How much do VSP's/VFD's help to reduce the number or size of hydropneumatic tanks in a system?
Initial surge or transient event after adding a surge tank to a model.
Installation - BENTLEY HAMMER
Layout and Data Input - Bentley HAMMER
Modeling - Bentley HAMMER
"Exactly two active pipes must be connected to this type of node in its current configuration."
"There is a data error affecting a diameter change or air valve." or "Invalid data" when computing transient simulation
Assumptions and limitations of tracking air or vapor pockets in HAMMER
Basics of a Transient Analysis in HAMMER
Batch run in HAMMER
Calculating Nominal Torque for a Transient Pump Startup or Variable speed
Can simple or logical controls be used during a transient simulation?
Changing the vapor pressure limit to compensate for altitude or fluid type
Check Valve Dynamic Curve or Reverse Velocity vs. Deceleration Curves for a Check Valve in HAMMER
Defining Orifice Between Pipes element by diameter
Determining the Headloss Coefficient for a hydropneumatic tank or surge tank
Difference between EPS and transient simulation
Difference Between Reservoir "Elevation" and "Elevation (inlet/outlet invert)"
Differences in hydropneumatic tank gas pressure results
Do the interpolation schemes used by HAMMER satisfy the Courant stability condition?
Does HAMMER account for water in the pump for inertia calculations?
Does the Extended CAV option apply to vapor pockets in the system or only air?
Entering Hydropneumatic tank gas preset pressure based on assumed initial bladder volume
Entering Pipe Wave Speed for a Transient Simulation
Error computing HAMMER model: Fatal Error in routine GETRD at 1
Error message 41303 "Cannot open report file"
Error notification "The valve characteristics curve must contain at least 2 entries"
Error opening model in HAMMER "21: out of memory"
Estimating the Specific Speed of a Pump or Turbine
How can I calculate the discharge coefficient (Cv) of a SAV?
How can I model a frictionless pipe?
How can I model a Vent Pipe or Stand Pipe in HAMMER?
How can I model an RPZ device (reduced pressure principle backflow preventer)?
How can I simulate a flywheel on a pump to reduce a transient?
How can you change the appearance of the profile in the Transient Results Viewer?
How can you find the minimum and maximum transient pressure or hydraulic grade results in a HAMMER model?
How do I model a valve that starts in the fully closed position, then opens up during the transient simulation?
How to set initial start time for a transient run in HAMMER?
Hydraulic grade above top of one way surge tank
Hydropneumatic tank Extended Node Data graph shows linear continuous increase
Hydropneumatic tank user notifications: "gas volume exceeds volume of tank" or "fills its containing tank"
Maximum air velocity and flow for Air valves in HAMMER (i.e., Sonic Limit)
Modeling a change in HGL or flow during a transient simulation
Modeling a Check valve or Control valve in a pump for transient analysis
Modeling a Non-slam Check Valve
Modeling a pump startup and shutdown transient event in the same simulation
Modeling a submersible pump
Modeling a Surge valve that opens between two pipes or that is controlled by pressure at a different location
Modeling a transient event in a sewer force main discharging to a manhole
Modeling a variable speed pump that changes speed during a transient simulation
Modeling a vertical pipe in HAMMER, WaterGEMS and WaterCAD
Modeling a vertical turbine or multi-stage pump
Modeling demand patterns (change in outflow) during a transient simulation in HAMMER
Modeling positive displacement pumps in HAMMER
Modeling Reference - Surge Tanks
Modeling the filling of an empty pipe in HAMMER
Modeling turbine instant load rejection with wicket gate starting less than 100% open
Negative pressures occur during a transient simulation no matter what protection is used
Opening WaterCAD and WaterGEMS models in HAMMER
Operating rule not being following after computing pump shutdown or start-up
Positive flow in pipe downstream of closed element or air valve during transient simulation
Pump is turning on during initial conditions calculation before a Pump Startup transient run
Pump Startup occurs too quickly / initial upsurge too severe
Reporting the velocity of air through an air valve in HAMMER
Setting up a Runaway speed scenario for a turbine
Setting up inlet orifice on a hydropneumatic tank that has two inlet pipes
Specific Speed and Pump Flow Calculations for a Transient Simulation
The results of a transient run are not matching the steady state results of a valve set to a given setting
Transient implications of soil, pipe lining, material and thickness
Transient pressure worse with air valve added
Transient profile data section intervals
Transient simulation for a hydrant closure or opening
Understanding length/wave speed adjustments and their impact on results
Understanding the Transient Friction Methods in HAMMER
Understanding transient Wave Speed Reduction Factor Calculation Option
User Notification "Concentrated CAV model must be used..."
User notification: "Element not included because it is Closed"
User Notification: "Initial pressure less than vapor pressure. At the pipe end(s), the elevation(s) or head(s) are incorrect"
User notification: "Pump Efficiency must be between X% and Y% inclusive."
Using Modulating PRV, PSV or FCV during a transient simulation
What does the following user notification mean: "The Check Valve at this element closes at time xx.xx seconds"
What equation does HAMMER use to compute the Darcy-Weisbach friction factor (f)?
What should the "flow tolerance" be set to?
What should the run duration of a HAMMER model be set to?
Where is the System Head Curve and Combination Pump Curve tools in HAMMER?
Why do turbine extended transient results stop at the time when the gate is 20% open?
Modeling a pump shut down transient event
Output and Reporting - Bentley HAMMER
User Notification: "Invalid results. Please check the input data for the connected elements."
What is the Transient Thematic Viewer in HAMMER?
What's New in HAMMER CONNECT Edition Update 2 - build 10.02.01.06
What's New in HAMMER CONNECT Edition Update 3 (build 10.03.00.69)
What's New in HAMMER CONNECT Edition Update 3 (version 10.03.05.XX)
What's New in HAMMER CONNECT Edition Update 3 - Build 10.03.01.08
What's New in HAMMER CONNECT Edition Update 3.4 (version 10.03.04.05)
What's New with Bentley HAMMER V8i SELECTseries 5
What's New with HAMMER CONNECT Edition Update 1
What's New with HAMMER CONNECT Edition Update 2
Help and Documentation
Licensing / Activation
Layout and Data Input
Output and Reporting
OpenFlows Product TechNotes And FAQs
Check boxes do not appear in tables such as Control Sets dialog
Consuming ContextCapture production files within your hydraulic model
Convergence NOT achieved Message when computing StormCAD or SewerCAD model
Converting Junctions or Hydrants to Isolation Valves
Displaying Shapefile Labels (Text) As a Background
Enhancing OpenFlows multi-user workflows with ProjectWise Share
Error 32768 when opening model while integrated with ProjectWise
Errors installing patch set
Error when opening PondPack: "Object reference not set to an instance of an object" or "Application has generated an exception that could not be handled."
Error when saving or validating: System.AccessViolationException: Attempted to read or write protected memory.
File Open Dialog does not appear
Flextable Report of Multiple Element Types
Get to know OpenFlows CONNECT Edition
Get to know WaterGEMS, WaterCAD and HAMMER CONNECT Edition
How do I import/export multiple point pump curve pump definitions into a model using ModelBuilder?
How do you save backup files, so they save at different times and multiple levels?
How does the intermediate geodatabase (.MDB or .GDB) file function with ArcMap and ArcGIS Pro integration?
How to Delete Engineering Libraries if you get a message about a Read-only database
How to receive alerts on new version availability?
How to register DAO360.dll or a dll file?
How to search using wild cards on a sqlite type of database
How to See Hebrew or Arabic text in a .DXF file that was exported from WaterGEMS/WaterCAD
Hydraulic grade discontinuity at steep pipes or across nodes (frontwater analysis)
I get a red user notification that says, "Inlet guttter mannings n should be greater than 0".
Importing .HLB library files from old product versions into format used in the V8 product versions
Importing External Data in Geographic Coordinate Systems
Importing storm data and other library information from older versions
Changing element symbols in the AutoCAD platform
Locating OpenFlows product error log file
Locating OpenFlows Product Version Number and License Information
Model backward / forward compatibility
Modeling a closed loop system
Modeling a flow split (diversion) with the SewerCAD or StormCAD numerical solver
Modeling turbine load acceptance plus load rejection
Multiple CN numbers for a catchment and multiple catchments with a single outlet node
Network Navigator Trace Upstream/Downstream does not return any elements
OpenFlows software numerical solver theory
Percent Connected Impervious Areas and Percent Unconnected Impervious Areas
Performing a hydrosanitary design in WaterGEMS or WaterCAD
PondPack user notification: "The composite outlet structure is either not selected or deleted."
PondPack: How to perform a critical duration analysis?
Pressure pipe vs. conduit between pump and wetwell
Print Preview > Fit to Page shows blank page
Properties not working when using MicroStation integration with ProjectWise
Properties, Flextables, user notifications, or other dialog is missing or will not open in standalone
Properties, user notifications, or other tool managers not showing up in Integrated version of AutoCAD
Reusing Pump Definitions (Import / Export)
Reversing orientation of Pipes and Conduits in Bulk
Saving a hydraulic model when using the AutoCAD platform (i.e. integrated)
Important License Update for OpenFlows Users
Setting the invert elevation for multiple conduits coming into one manhole
Simple Controls vs. Logical Controls
Sorting and relabeling a flextable based on upstream-downstream order
Source of the default Specific Speed for pumps and turbines
Step by step procedure for finding the curb length needed to capture 100% of gutter flow in a curb inlet with a continuously depressed gutter with no clogging
System.Reflection.TargetInvocationException crash when trying to open the application
Test Wiki Page - A1
Text, cells/blocks and line styles do not display correctly in a DXF background layer
The flow annotation (label) in my WaterGEMS for ArcMap isn't reflecting the value displayed in my Geotable or Flextable
The total area in the CN/Area Collection does not equal the total catchment area
Time tolerance setting in SCADAConnect Simulator
Troubleshooting ArcMap / ArcGIS Integration
Understanding Flow (Additional Subsurface) and Flow (Additional Carryover)
Upcoming training and release dates for OpenFlows products
User notification "Downstream TW out of range..."
User notification "Pump exceeds the maximum operating point specified for the pump curve"
User Notification - The captured surface flow at this node does not connect a valid subsurface network. The flow is lost from the system.
User Notification: "There is an error in the data for this pipe. The associated data is incorrect"
User Notification: Cross section maximum elevation is above the maximum headwater elevation
User Notifications: "Pump On elevation is not in the range of upstream ...." and "Off elevation of pump is lower than ..."
Using batch pipe split to fix nodes that overlay a pipe instead of connecting to it
Using PondMaker with different tailwater for each return event
Valve "Status (Initial)" Definitions
Velocity Calculations and the Average Velocity Methods in SewerCAD and StormCAD
Viewing graph data for multiple scenarios
Water age results in a pipe are different from the age in the downstream junction
Water Loss Management
Water quality Analysis during transient events
What are the limitations of importing/exporting EPANET files?
What is the dotted line that is associated with the isolation valves? Can I turn them off?
What's new in WaterCAD, WaterGEMS and HAMMER V8i SELECTseries 6 with CONNECT Integration?
What's New in WaterOPS CONNECT Edition 2.3 (Build 10.02.03.06)
When the user changes the fluid, why doesn't the calculated pump head change?
Working From Home With Your OpenFlows Software
"An error occurred when trying to calibrate the model"
"COM Error Not Documented" when opening OpenFlows product
"Default license feature configuration not found. Product features may be limited. Please run the License Administrator."
"The Depth-Flow, Depth-Flow (Simulated Variable Speed) and Volume-Flow pump definition types are unsupported"
"Unable to assign attribute ... for element because enumeration value ... is not valid."
Add custom data to profile with User Data Extensions
After computing a model with the SWMM solver, what does the following warning mean: "Maximum depth increased for node CB-XX"?
After computing the model, the pump efficiency results are listed as N/A
After running loadbuilder I get a message that says "The layer <Layer_Name> could not be opened."
At what point does OpenFlows product license usage start when integrated with MicroStation?
Background image quality poor on some computers or Crash when opening models with background layers
Blocky stepwise pattern is displayed instead of a continous smooth pattern that was entered when using the SWMM engine
Can User Data Extensions be shared between elements in a model?
Catch basins imported as manholes from LandXML
Change in results before turbine load rejection occurs
Custom quadrant curve not being recognized
Date-time based query not working
Default license configuration not retaining setting
Do inactive elements count against the license count?
Does HAMMER support initially negative pressures?
Does the friction method affect local minor loss in pipes?
Does WaterGEMS and WaterCAD report pressures as gauge pressure or absolute pressure?
Efficiency Curve vs. Wire-to-Water Efficiency Curve
Error importing a LandXML file from StormCAD into Civil 3D "A pipe or conduit had an unsupported geometry"
Error message when validating model: "Elevation (Relative) values within the Irregular shape definition must be non-negative."
Error message: "Unrecognized database format ..." when trying to open model
Error Saving: "Custom results path is invalid"
Find if pump operates off of the pump curve during an automated fire flow scenario
Flow arrows are not included in an exported DGN file when using the Save Symbology option in the MicroStation platform
Flow from pump is delayed after pump startup
GeoPak - StormCAD errors - GEOPAK runtime environment not found / Error writing GEOPAK/PowerCivil node
HEC-22 2nd edition energy loss calculations with the Implicit solver
How are "pipe sets" and "nodes of interest" used in a flushing analysis to get auxiliary results at other elements?
How can I see the amount of inflow or outflow occuring for a particular surge tank during the transient simulation in HAMMER?
How do I filter a column in my flextable using a custom query that retrieves all records with a <None> attribute?
How do I know if and when my pond is overtopping and how to quantify it?
How do I save my model files when working in the ArcMap or ArcGIS Pro platform?
How do the channel slopes and velocity effect the headloss formulas in SewerCAD and StormCAD?
How does StormCAD handle gutter flow from an active catch basin to an inactive catch basin?
How does the diameter of an isolation valve effect the calculated results?
How to add comments on custom pump and turbine quadrant curves
How to find volume of water coming from a trace element?
How to open a .PRNX report file created on exporting custom report in OpenFlows product
Hydropneumatic tank atmospheric pressure not changing results
Hydropneumatic tank profile animation and time history shows zero gas volume
Initial surge when using turbine load acceptance operating case
Initial turbine HGL the same as the final HGL after load acceptance
Irregular Weir Flow Calculations in a Composite Outlet Structure
Is it possible to create old PondPack style text reports?
Is it possible to have a storm event start at a different time than the model simulation?
Is it possible to use point cloud information to populate elevations in Terrain Extractor (TRex)?
Is there a recommended level of Skelebration for different modeling conditions?
Junctions are created on top of one another after using ModelBuilder with the GIS-ID property
Learning Resource Guide for WaterSight
License usage in the ArcMap and ArcGIS Pro platform
LoadBuilder applying demands or loads to inactive elements
LoadBuilder importing zero flow loads
Long time to load background layers
Manage Pump Speed Series
Manage Pump Time Series
Managing large number of scenarios
Missing Young's Modulus and Poisson's Ratio values in the material library
Modeling Arch section shapes in SewerGEMS
Modeling closed or pressurized pipes in PondPack
Modeling treatment for pollutants at nodes or ponds in SewerGEMS and CivilStorm
MrSid files are not available as a background layer type or an error is generated when loading MrSid files
OpenFlows Academic Books
Pipe Renewal Planner Vs OpenFlows WaterCAP
Pipes connecting to the wrong element after submodel import
Pipes not merging when using Skelebrator with series pipe merging
PondPack error: Unable to open user roster
Problems opening GEOPAK Drainage file exported from StormCAD
Query, alert or formula UDX not working correctly with "=" (equals)
SCADAConnect in SewerGEMS
SCADAConnect Simulator in WaterCAD and WaterGEMS V8i SELECTseries 5
Series Pipe Merging in Skelebrator not working for pipes with zero diameter
Small difference in gutter worksheet result between US and SI units
The concentration at the stop node directly after a constituent source in a tank is decreasing rapidly
The control symbol, check valve symbol, and dashed lines connecting customer meters, isolation valves, and SCADA elements are not visible in the ArcMap or ArcGIS Pro platforms
The headloss in a pipe downstream of a parallel VSP is higher than expected
The result field "Depth (Flooding)" is listed as N/A after computing a model with the SWMM engine. Is there a way to see the depth of flooding for a node?
Translated version still showing as English
Troubleshooting making a SCADA connection to Oracle database
Troubleshooting ModelBuilder issues and errors connecting to an Oracle database
User Data Extension not appearing in the Post-Calculation Processor's "Output Property" field
User Data Extensions in the Fireflow report
User Notification "More than one VSPB cannot control the same control node"
User notification when computing: IDF data is not supported by SWMM. Storm event is excluded from export.
User notification: "Conduit has a Stop control structure, but this is not supported next to the connected outfall element."
User notification: "Transition from CONCENTRATED to EXTENDED"
Using Imperial and Metric Hydro International Vortex Valves
Using US Survey feet
Warning about outlet hydrograph not cresting
WaterGEMS and WaterCAD Data Import FAQ
WaterSight - Pump Overview
What can I do to speed it up a file I need to extract elevations from is taking a long time to process in TRex?
What does Entrance Control mean?
What is the best way to model an orifice plate inside a catchbasin with surface storage above the catchbasin rim?
What is the difference between a stand pipe and an inlet box?
What is the purpose the Rainfall File, Runoff File, and RDII File in the Calculations Options?
What is the workflow for setting up pre and postdeveloped conditions for multiple return events?
What kind of demands should be used as the initial conditions of a transient simulation?
What's new in HAMMER V8i SELECTseries 6?
When running a query, why is it not picking up the elements that it should?
Why are there 2 entries for the same alternative in the dropdown menu in the properties of a scenario? One with an "i" and one without it.
Why are there so many extra element types listed for WaterGEMS and WaterCAD, such as surge tank, rupture disk, Periodic head-flow?
Why do I get a warning message about the rational method being used for the modified rational method?
Will SCADA Results Publishing work with only OPC sources?
Specific Speed and Pump Flow Calculations for a Transient Simulation
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