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2D stormwater modeling in Civil Storm and Sewergems

Hi,

Are these two packages 2D modeling capable, and can you point us to the literature on that capability and the workflows for setting up the run to see what happens during flooding

Parents
  • I kind of knew 2D urban flood modeling was not yet included but something lead to this question.

    I attended an event where a consultant showed a presentation on hydrodynamic modeling and simulation that featured some form of urban flood modeling that is said to be  done in SewerGems (the presentation slide cited SewerGems as the tool). Basically. while looking at a plan view of the developed site, at a point in time, stormwater, in excess of the drainage network capacity, started spreading on the road surface up to  point in time when max extent of flood was reached and then water ponding started receding till water disappeared (eventually drained back into the network)

    I was wondering if this simulation was facilitated by a "Ponded Area" surface storage option for manholes and catch basins. Can this be represented in plan view to show the above and how is that possible without 2D simulation and a digital terrain

    I got other answers during the event that caused confusion but I will keep that out of here for the moment

Reply
  • I kind of knew 2D urban flood modeling was not yet included but something lead to this question.

    I attended an event where a consultant showed a presentation on hydrodynamic modeling and simulation that featured some form of urban flood modeling that is said to be  done in SewerGems (the presentation slide cited SewerGems as the tool). Basically. while looking at a plan view of the developed site, at a point in time, stormwater, in excess of the drainage network capacity, started spreading on the road surface up to  point in time when max extent of flood was reached and then water ponding started receding till water disappeared (eventually drained back into the network)

    I was wondering if this simulation was facilitated by a "Ponded Area" surface storage option for manholes and catch basins. Can this be represented in plan view to show the above and how is that possible without 2D simulation and a digital terrain

    I got other answers during the event that caused confusion but I will keep that out of here for the moment

Children
  • Hello AHQ.

    • Whether that will be a separate MOHID studio license or you can use one of your existing, this question cannot be answered at this moment. Since we are still looking into integrating it with SewerGEMS or CivilStorm and will publish our views about once we are with the outline of this integration. 
    • You can visualize the surface storage option with the help of graph, to know the amount of overflow and its extent. 

                Depth (flooding) will give you the depth of overflow which will vary with the time or you can also graph for flow (overflow) over the time. 

                Or you can also color code these result fields to view in the plan view. 

    Interpreting results when using manhole or catchbasin Surface Storage 

    Regards,

    Sushma Choure

    Bentley Technical Suppport

  • the graph view is a standard way of seeing things that I'm familiar with and is not what attracted my attention leading to me asking the question. What I saw is, and i will repeat from my original question:

    "while looking at a plan view of the developed site, at a point in time, stormwater, in excess of the drainage network capacity, started spreading on the road surface up to  point in time when max extent of flood was reached and then water ponding started receding till water disappeared (eventually drained back into the network)"

  • I am not sure how the facilitator of this demo was able to accomplish this. Without more details I can only guess that the visualization was somehow linked to the node hydraulic grade along with the use of one of the surface storage methods. Or, perhaps they were using channels and cross section elements with irregular cross sections defined, also somehow mapped to the visualization aspect of the demo.


    Regards,

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

    Answer Verified By: A