• 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.
  • 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…
  • 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…
  • Error when opening model with DXF background (HRESULT, acdb19.dll, AecBase.dbx, etc)

    Product(s): SewerGEMS, WaterGEMS, StormCAD, SewerCAD, WaterCAD, CivilStorm, HAMMER Version(s): 10.XX.XX.XX, 8.11.XX.XX Area: Other Error or Warning Message When trying to open any model with a .dxf background layer or when…
  • ModelBuilder Error "### Pipe(s) could not be created due to missing topology."

    Product(s): WaterGEMS, WaterCAD, HAMMER, SewerGEMS, SewerCAD, StormCAD, CivilStorm, PondPack Version(s): CONNECT Edition, V8i Area: Layout and Data Input Problem When importing elements with ModelBuilder the following is displayed…
  • 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 …