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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, minor and major rivers tributaries etc.?  how it can be different from other software like HEC-RAS, SOBEK ,SWMM  etc. 

e-mail id - toufikmaner096@gmail.com 

  • Hello Toufik,

    SewerGEMS can be used to model storm, sewer, and combined storm-sewer systems. I would recommend looking at the data sheet for SewerGEMS, which gives a good overview. 

    SewerGEMS is a superset of all of the storm and sewer products, and includes multiple solvers. This link has information on the differences between these. SewerGEMS will model catchment runoff into a storm system, which can include channel flow and ponds

    I would recommend taking a look at some of the links above, as well as the sample files that ship with SewerGEMS. The same files can be found at C:\Program Files (x86)\Bentley\SewerGEMS\Samples. If there are any specific questions you have, please let us know.

    Regards,

    Scott

  • Just a quick comment to specifically address the modeling of steams and rivers - the dynamic solvers in SewerGEMS (and CivilStorm) can model these with the channel and cross section elements. The cross sectional area of the river/stream is modeled at the cross section node and the channel link element connects the cross sections. With the Explicit (SWMM) solver the channels are treated as prismatic where the cross sectional area is constant between the cross section nodes. With the Implicit solver, channels are treated as non-prismatic and the cross sectional area is gradually interpolated between the cross sections. In most typical modeling cases this won't make a significant difference (especially of an adequate number of cross sections are included) but I wanted to mention it since you are comparing to HEC-RAS. See: Are Channels prismatic or non-prismatic?

    You can also model culverts along a river and the impact of the headwall resistance. See: Modeling Reference - Headwalls

    The "Office Project" sample (within the Samples folder that Scott mentioned) has some examples of river systems.


    Regards,

    Jesse Dringoli
    Technical Support Manager, OpenFlows
    Bentley Communities Site Administrator
    Bentley Systems, Inc.