• Problem using SewerGems Explicit SWWM Solver - culvert inlet coefficient

    Hello I am trying to run a hydraulic model with explicit calculation solver However, the model does not run because of the following error "culvert inlet coefficient assigned to this conduit has a swwm culvert code which only applies to culvert…
  • Highest Continuity error in POS

    Hello, My drainage network simulated in Sewergems Explicit solver is consist with Ponds and POS. I'm getting not converging %, more than 5%. It gives unstable flow results. When I check the report summary, it shows higher continuity error in POS. Is…
  • Results instability- Explicit Solver

    Hello, I'm simulating a storm network in sewergems platform. My network is connecting with a pond and the variation of HGL of the pond and the U/S node of the incoming channel is shown below. I'm using explicit solver, with 6 sec routing time step…
  • Explicit Solver limitations

    Hello, I am simulating a stormwater network (in sewergems) where I have channels, conduits, manholes, Ponds (3 nos), POS, Pumps. I can not simulate this in Implicit solver (as it takes hours and giving unstable results). When I simulate in Explicit…
  • Rectify issue in Explicit Solver

    Hello, I'm simulating a drainage network in SewerGEMS. The network consist with open channels, closed conduits, pond, pump, POS(no control structure). when I simulate the model in Explicit and implicit solvers, I'm getting two different profiles as…
  • SWMM Control

    Hello, I'm simulating a stormwater network where I have a pond. in the pond outlet channel I need to introduce a stop control structure and assign a orifice gate where I can open/close it with SWWM control set using pond water level. My issue is …
  • Simulating in Explicit Solver

    Hello, I'm simulating my model in explicit solver and I have set the SWMM output increment to 0.1 hr. Then when I go for profile simulation, always my profile start with 0.1 hr. Is it possible to change it to Zero? BR Nishadi
  • Depth (Surcharged) of Manholes using Explicit SWMM Solver

    Using SewerGEMS Connect Edition 10.02.04.53 For manholes, I am wondering how the software calculates the area/volume of water that is stored over the rim elevation corresponding to the surcharge depth. For example, below is a manhole that has…
  • Implicit solver for Open channel network

    Hello, I'm simulating a stormwater model in sewergems platform. the network is simulating as open channel flow. further, network is bit complex with several tributaries with several sections (unlined trapezoidal, RCU rectangular drains, box culvert…
  • Zero overflow volume in manholes that show True in the "is ever overflowing"?

    SewerGEMS: Why I have zero overflow volume (Hydraulic Reviewer manhole table) in manholes that show "True" in the "Is ever overflowing" field? I'm using the explicit SWMM solver and I don't have bolted covers. Thank you very much.
  • SewerGEMS High Continuity Error during specific storm that causes flooding of catch basins

    Hello, I have a SewerGEMS model set up to review 2, 10, 100, and 2500 year storm scenario's. For this model, the explicit solver achieved much better convergence and continuity error results for the 2, 10, and 100 year storms. However, I am seeing very…
  • SewerGEMS Explicit Solver Time Step Critical Elements

    Can someone explain to me what the "Time Step Critical Elements" are when running a SewerGEMS Model with the explicit solver? After a model run when looking through the summary report, there is a section titled "Time Step Critical Elements". My model…
  • SewerGEMS Explicit Solver "The crown of the link adjacent to the Start Node is above the top of the node"

    I cannot for the life of me get this warning to disappear from my model. If someone could take a look at the node that is causing an error that would be great. The model contains a double barrel arch CMP pipe as an outlet structure for a pond. The pond…
  • why there's implicit and explicit solver?

    hi guys hope you're doing fine am just curious about : why there is an explicit and implicit solver? isn't the implicit is the best one what ever ? why modified rational method wont run on explicit ? and work on implicit and thank you coardially…
  • RE: SURCHARGE NETWORK

    Daniel, We have a wiki article that explains the difference between the StormCAD solver (GVF Rational engine) and the CivilStorm solver (Implicit or SWMM dynamic engine) that will help explain when to use each solver for the results that you're looking…