Bentley Communities
Bentley Communities
  • Site
  • User
  • Site
  • Search
  • User
OpenFlows | Water Infrastructure
  • Product Communities
OpenFlows | Water Infrastructure
OpenFlows | Water Infrastructure Wiki Modeling a weir within a catch basin or manhole
    • Sign In
    • OpenFlows | Water infrastructure Wiki
    • -OpenFlows CivilStorm
      • "Index was outside the bounds of the array" error message when computing the model
      • +Calculations - Bentley CivilStorm
      • +General - Bentley CivilStorm
      • +Help and Documentation - Bentley CivilStorm
      • +Installation - Bentley CivilStorm
      • +Layout and Data Input - Bentley CivilStorm
      • -Modeling - Bentley CivilStorm
        • Available Pond Seepage (infiltration) and evaporation methods per solver
        • Can I view the total runoff volume from each catchment for certain time frames, such as each day of a simulation?
        • Can we model sewage treatment plant units in SewerGEMS / CivilStorm?
        • Changing the width of the border lines of catchments or other polygon elements
        • CivilStorm and SewerGEMS results are different from EPASWMM
        • Configuring Scenarios and alternatives for common tasks in CivilStorm V8i
        • Defining conduit or channel roughness varying with depth or flow
        • Design depth of Flow based on average and full flow
        • Error opening model: "ArgumentException: Adding Duplicate"
        • How are interconnected ponds modeled in CivilStorm or SewerGEMS?
        • How to model aquifers in SewerGEMS and CivilStorm using the SWMM solver
        • InRoads crashes when viewing and editing a model imported from a storm-sewer product
        • Modeling a rectangular channel using the channel element
        • Modeling a User Defined Tailwater
        • Modeling a weir within a catch basin or manhole
        • Modeling check dams in a channel
        • Modeling Low Impact Development (LID) Controls
        • Modeling one structure with two inlets (grates)
        • Modeling overflow from a Low Impact Development (LID) control
        • Modeling surcharging of an enclosed storage
        • Modeling surface ponding for overflow above multiple inlets
        • No seepage results from pond in SewerGEMS or CivilStorm
        • Opening an InRoads Storm and Sanitary drainage database in Storm/Sewer products
        • Problems with using 3D Length - crash or "Unexpected Node element type"
        • Query not returning results for fields that use a pick-list
        • Result difference when using runoff coefficient loss method
        • The catch basin is the start (upstream) node for more than one gutter. Only one gutter is allowed to come out of a catch basin node.
        • The hydrology computes but there is no flow in conduits and the calculation summary contains no results.
        • The spread/ top width (stop) in my gutter is N/A
        • What is the Kr coefficient for a culvert or headwall?
        • When calculating a model, the following user notification is generated: "The wrong type of storm event is specified."
        • Zero flow in model despite successful run and presence of storm or loading
      • +Output and Reporting - Bentley CivilStorm
      • +Output/Results Presentation - Bentley CivilStorm
      • Program crashes when computing with System.Exception: InputData error
      • What's New with CivilStorm CONNECT Edition Update 1
    • +OpenFlows CulvertMaster
    • +OpenFlows FLOOD
    • +OpenFlows FlowMaster
    • +OpenFlows HAMMER
    • +OpenFlows PondPack
    • +OpenFlows SewerCAD
    • +OpenFlows SewerGEMS
    • +OpenFlows StormCAD
    • +OpenFlows WaterCAD
    • +OpenFlows WaterGEMS
    • +OpenFlows WaterSight
    • +OpenFlows WaterOPS
    • +OpenFlows SewerOPS
    • +Bentley HEC-PACK
    • +General
    • +Help and Documentation
    • +Installation
    • +Licensing / Activation
    • +Integration
    • +Modeling
    • +Layout and Data Input
    • +Calculations
    • +Output and Reporting
    • +Other
    • +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 "System.TypeInitializationException"
    • 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
    • Interchange
    • Locating OpenFlows product error log file
    • Locating OpenFlows Product Version Number and License Information
    • Model backward / forward compatibility
    • Multi-user Workflows
    • 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."
    • Pressure pipe vs. conduit between pump and wetwell
    • Print Preview > Fit to Page shows blank page or Reports will not print
    • Properties not working when using MicroStation integration with ProjectWise
    • Properties, Flextables, user notifications, or other dialog is missing or will not open or appears to freeze the program
    • 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
    • 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 Integration
    • Turbine Efficiency
    • 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
    • WaterGems Tips
    • 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."
    • Arch section shape modeling limitations
    • 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
    • Calculating ellipse coefficients in CulvertMaster
    • Calculation of Side Flow factor with grate width less than gutter width
    • 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
    • Conduit "Size" attribute does not appear correctly in annotations or reports
    • 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
    • HAMMER error: "Zero initial head from pump (turbine). Change at least one of the heads at the pump ends of the adjacent pipes."
    • 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 can I speed up computing a model that I need to extract elevations from - it is taking a long time to process in TRex?
    • 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 do you define the starting conditions of the transient simulation?
    • 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?
    • Is there a way to model a rectangular pipe in WaterCAD, WaterGEMS or HAMMER?
    • 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
    • Log4net issues appear in security scans for OpenFlows products
    • 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 closed or pressurized pipes in PondPack
    • Modeling culverts in series in CulvertMaster
    • 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
    • My scenario label is not in my report preview when I run the report builder
    • +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
    • Post calculation processor tool error: The result property and output property have no common supported element types.
    • Problems opening GEOPAK Drainage file exported from StormCAD
    • Purpose of the Virtual Flow Depth Calculation Option
    • Query, alert or formula UDX not working correctly with "=" (equals)
    • Red user notification, "Post engine loading process encountering unexpected data. Please rectify any validation errors and try again."
    • Reporting pressure available at the exact total needed fire flow
    • SCADAConnect in SewerGEMS
    • Series Pipe Merging in Skelebrator not working for pipes with zero diameter
    • Sharing Queries for use in other models
    • 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 ArcGIS Pro Integration
    • Troubleshooting making a SCADA connection to Oracle database
    • Troubleshooting ModelBuilder issues and errors connecting to an Oracle database
    • Unexpected small flow in pipes that should have zero flow
    • Use of the Gas Law Exponent During Initial Conditions vs. Transient simulation
    • 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
    • +WaterSight Learning Resource Guide
    • Wetwell flooded warning in steady state with GVF Convex (SewerCAD) solver
    • 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?

    You are currently reviewing an older revision of this page.

    • History View current version

    Is it possible to model a weir within a catch basin or manhole in the the storm-sewer Haestad products?

      Product(s): Bentley SewerGEMS, Bentley CivilStorm, Bentley SewerCAD, Bentley StormCAD
      Version(s): 08.11.xx.xx or higher
      Environment: N\A
      Area: Modeling

    Problem

    Is it possible to model a weir within a catch basin or manhole in the the storm-sewer Haestad products?

    Solution

    It is not possible model a weir directly within a node, but there are a few workarounds that can be tried.

    Option 1

    First, you can apply a start control structure on the conduit directly downstream of the catch basin or manhole. This would simulate a weir that is right where the catch basin or manhole connect to the downstream conduit. One of the control structure types that can be modeled in this way is a weir.

    Enter the weir data with elevations expected for the weir within the catch basin or manhole. The flow through the conduit will not start under the elevation is above the weir elevation in the control structure. This method works best when the invert of the downstream conduit and the invert of the catch basin or manhole is the same. If the you are modeling a drop structure, you would need to adjust the weir elevation for the start control structure to account for the drop depth.

    It is also possible model this as a stop control structure. The workflow is the same except that the flow through the conduit would not enter the catch basin or manhole until the elevation in the conduit is above the weir.

    Option 2

    Another option is to model the catch basin or manhole as a small pond with a pond outlet structure using a weir. In this case, the manhole would be replaced with a pond with the same dimensions as the original manhole. The conduit that drains into the manhole would need to end with an outfall that uses the new pond as the boundary element. A pond outlet structure will need to be added as well. This will be set as the weir.

    The end result for this will be similar to Option 1 above. If the manhole or catch basin is relative small in depth and/or diameter, you may need to decrease the time step and the output increment to increase the stability of the results.

    In addition, this workflow would work best when there is no gutter attached to the catch basin.

    Option 3

    The third option would be model the weir as a structure loss. If you are using the GVF-Rational solver (available in SewerGEMS, CivilStorm or StormCAD) or the GVF-Convex solver (available in SewerGEMS and SewerCAD), you could convert a rating table for the weir into a flow-headloss curve, which is one of the structure loss methods available in this solver.

    If you are using the Implicit solver, you could use the Standard headloss. With the right headloss coefficient, you may be able to reasonally match the rating curve for the weir (the rating curve would need to converted to use a head drop instead of an elevation to better see the difference). This will take some trial and error and would in all likelihood end up being an approximation.

    You could also use the Absolute headloss method based on the head drop seen in the weir rating table for a typical flow. This would allow you to make a conservative estimate for the headloss. In addition, if you are using the Explicit solver for Option 3, you would need to use the Absolute headloss method since the Standard headloss method is not available with this solver.

    Communities
    • Home
    • Getting Started
    • Community Central
    • Products
    • Support
    • Secure File Upload
    • Feedback
    Support and Services
    • Home
    • Product Support
    • Downloads
    • Subscription Services Portal
    Training and Learning
    • Home
    • About Bentley Institute
    • My Learning History
    • Reference Books
    Social Media
    •    LinkedIn
    •    Facebook
    •    Twitter
    •    YouTube
    •    RSS Feed
    •    Email

    © 2023 Bentley Systems, Incorporated  |  Contact Us  |  Privacy |  Terms of Use  |  Cookies