• 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…
  • Composite outlet structure for Ponds

    When doing a new composite outlet structure with orfice and weir, does the rating table information need to be something that is put in prior to running the model? or is the rating table and curve table populated after running the model? I am updating…
  • 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…
  • Can we use sewerGEMs for storm water modelling?

    hello My name is Toufik Maner. I am going to work on" Storm Water Modelling" project using SewerGEMS and I am new to this software. Could somebody please tell me whether I can use SewerGEMS Software to model storm water system having natural streams…
  • 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…
  • SewerGems Hydraulic grade line in profile is not correct, also drastic change in HGL peak level along same segment.

    Hi All, I am using SewerGems (connect edition), I believe most users of the software might have encountered this issue. While working and checking the network profiles it is observed that, HGL (water level) shows drastic level change. In principle…
  • SWMM 5.1 Results differ from Sewergems SWMM Calculation Results

    I am getting a -21.0% Flow Continuity Error in my Sewergems model so I exported it and ran it in the SWMM 5.1 software and got a -0.16% Flow Routing Continuity Error. I'm wondering what could cause such a drastic change in results. A few notes.…
  • SWMM Interface Files

    I'm currently running a rather large model that has somewhat extensive hydrology, and I was looking at the option of using the SWMM interface files (rain file, runoff file, RDII file) to save the hydrological results so I don't have to rerun them every…
  • Re: Reporting in SewerGEMs with SWMM engine

    No, I do not believe there is a way to customize the data included in the SWMM text output file. However, you should in fact be able to also use the flextable and other tools in SewerGEMS such as element properties, graphs, profiles, etc, to see the results…
  • Error message in SewerGEMs during validation

    I was validating my model in SewerGEMs and recieved the following message for each of the catchments in the model: "The EPA Runoff calculations failed for this catchment." The user's manual does not give any indication to the source of…