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  • Hydraulic conductivity of sewage

    Hello everyone. I want to ask you by whose formula is calculated the hydraulic conductivity of round section sewage pipes depending on the filling of the pipe (h/D) in SewerGEMS. It could be by Thormann's , Manning's or someone elses. I'm attaching graph…
  • Warning Notification " structure invert XX ft lower than headwater minimum elevation XX ft"

    Hi, I got the warning notification stated above and I looked at my model and it seems that we have the lowest office in the pond outlet to be lower than the pond outlet invert and the headwater elevation. I am thinking that I need to fix that by placing…
  • Warning notification "Air valves are treated as junctions with large surcharge depths."

    Hi, Again i got this warning notification stated above when i validated my model. Again i was not sure what this notification is really trying to tell me? It does not allow me to zoon into a structure, pipe, pond or anything so not sure where in my…
  • notification warning "The composite outlet structure EQT has one or more headwater elevations with reverse flow conditions. Calculated reverse flow may be approximate."

    Hi, I am getting the notification stated above in my question. If I want to portray reverse flow is that something I need to worry about fixing or is it just warning me there is reverse flow so I am aware of it? Please advise. Thanks, …
  • Void Space Values other than 100%

    Hi, After validating a model before running it I found another error as stated below: "The SWMM engine does not support Void Space values other than 100 percent. Alternate values are ignored." I zoomed into it and it went to a pond and I tried…
  • Percent Connected Impervious Areas and Percent Unconnected Impervious Areas

    Hi, I am getting the same error that i found with the question asked regarding the percent connected impervious. I have read through the other question and answer and I think it did answer my question, however if we do have it shown like i have below…
  • How does "constant flow" for pond seepage method?

    Hi, I was wondering if I did the "constant flow" method does the pond need to be using Elevation-Area or one of the other options under the volume type that are available? Also i am aware that the solver should be implicit or the GVF-Rational (StormCAD…
  • How to discard water quality volume to an arbitrary outfall?

    Hi, I have a model in which a pond goes to an outlet structure to go directly to our storm system. However, we want to discard the water quality volume from that same pond to go to arbitrary outfall so it does not affect downstream of our system. I…
  • How to calculate Sewer Network Storage in SewerGems

    Hi, I am going to calculate the gravity sewer network storage upstream of a manhole. I want to plug a manhole temporarily and do some repairing tasks downstream. So, I am going to calculate the gravity sewer network storage upstream of the manhole.…
  • Is it possible to design unknown conduit/manhole inverts while maintaining conduit diameter and other hydraulic elements?

    I have a existing model which contains sections with unknown conduit/manhole invert elevations, but the conduit diameter is known. I want to apply minimum slope relative to their known diameter to these sections in order to obtain inverts.
  • Overflowing Catch Basins and Manholes - SewerGems Hydraulics

    Good morning, Does anyone know how exactly these two fields "Is Overflowing?" and "Is Ever Overflowing?" affect the results of max depth (ft) and Max Hydraulic Grade (ft)? In general, wherever I have the "Is Overflowing?" box unchecked I see a much…
  • SewerGems - Sag Inlet Modeling

    Hello, I am working on a project using SewerGems, as required by the client. We are semi-new to the software, but have a model built and looking for some guidance on how to efficiently model sag inlets. We currently have the subcatchment routed to a…
  • Anyone Designed A Combined Sewer System From A to Z on SewerGEMS?

    Hello everyone! I wonder if anyone ever modeled or designed a big system on SewerGEMS that conveys both stormwater and wastewater into a wastewater treatment plant, that is, having catch basins connected to manholes, creating dry and wet weather scenarios…
  • Bentley OpenFlows SewerCAD & SewerGEMS Online Training

    IFS Academy is Bentley Institute Authorised Product Training and regularly organises Bentley OpenFlows SewerCAD & SewerGEMS Online Trainings . Please click on the link given below for further information. https://ifsacademy.org/bentley-sewercad-sewergems…
  • BENTLY - SEWERGEMS CONNECT EDITION UPDATE 1

    Ques-1 : If i have taken from Center line of the road network in Autocad dxf file and Imported in Sewergems software using Model Builder. Now, The Network of the centre line pipe, lots of bend came in the network. One by one we can select the pipe and…
  • Land Use_SewerGEMS

    In Bentley SewerGEMS, I could not find globe edit for the land use in the flex table, and can not add Percent of Catchment to the flex table. I would like to assign the land use to the catchments and I have around 3,700 catchments, is there a way; or…
  • SewerGEMS Skeletonization

    Does SewerGEMS have a tool to skeletonize the network similar to WaterGEMS? We are only planning to model the main "backbone" system, because we do not have good invert data for the entire system, but we want to use parcel and land use information to…
  • How do I perform a sensitivity analysis?

    Applies To Product(s): WaterGEMS, SewerGEMS, CivilStorm, StormCAD, PondPack, SewerCAD, HAMMER, WaterCAD Version(s): 08.11.XX.XX, 10.XX.XX.XX Original Author: Mark Pachlhofer, Bentley Technical Support Group …
  • Why do I get a warning message about the rational method being used for the modified rational method?

    Product(s): Bentley SewerGEMS, CivilStorm Version(s): V8i, Connect Edition Area: Output and Reporting Problem Why do I get the warning message "The catchment is currently set to modified rational method. The rational method…
  • Is it possible to have a storm event start at a different time than the model simulation?

    Product(s): Bentley SewerGEMS, Bentley SewerCAD, Bentley CivilStorm Version(s): 08.11.xx.xx, 10.XX.XX.XX Environment: N\A Area: Modeling Subarea: N\A Problem Description Is it possible to…
  • Tras calcular el modelo con el SWMM solver, no todos los resultados son mostrados en las flexitables, graficas y propiedades

    Se aplica a Producto(s): Bentley SewerGEMS Versión(s): 08.11.04.54 Entorno: N\A Área: Output and Reporting Subárea: N\A Número de defecto: N/A Autor original…
  • ArcGIS 10.3 support for Bentley WaterGEMS, HAMMER and SewerGEMS

    As seen in a recent announcement , Bentley SewerGEMS V8i SELECTseries 5 (08.11.05.58) has been released, which adds support for Esri ArcGIS 10.3. An update is also now available for Bentley WaterGEMS and HAMMER V8i SELECTseries 5 (08.11.05.61), to add…
  • How is the headloss for a weir calculated in the control structure for the storm and sewer products?

    Applies To Product(s): Bentley SewerGEMS, Bentley SewerCAD, Bentley CivilStorm Version(s): 08.11.xx.xx Environment: N\A Area: Modeling Subarea: N\A Original Author: …
  • Error while importing elevation points in sewergems using Trex function

    While importing dxf which contains levels are marked in z coordinate. I am getting error that T he data source file must contain at least three unclipped points in order to create an elevation map
  • can't find "is diversion?" in the pipe properties

    Why there is no "is diversion?" field in the pipe properties? Thanks Hamid