HELP WITH STORMCAD MODEL, PLEASE

Hello Mahmoud,

I see that you're using a pump in this model. Pumps are typically not used with the GVF-Rational (StormCAD) solver, so they are treated as ideal flow pumps. Meaning, flow in will equal flow out and the pump curve is not used in the calculations. This means that the pump flow will be equal to the flow into the upstream wetwell or pond. See more here:

How are pumps handled in each Haestad product?

I also see that you're using a slightly older version of StormCAD, 08.11.05.113. To learn more about the benefits of the new CONNECT Edition, see: What's new in StormCAD CONNECT Edition

If the above does not help, then as Mark said please explain the specific question or problem.

so you say if i want to use a pump to rais the water from a wet well to a higher outlet ... i have to use another program !!!

Mahmoud,

Since StormCAD was not designed for detailed pump analysis, it makes an appropriate assumption, showing you the pump flow equal to the wetwell inflow, with the pump head that would be necessary to overcome the static and dynamic lift for that flow and the upstream/downstream boundary conditions (wetwell HGL and downstream gravity main/outfall elevation).

If you need to do further analysis of pumping situations, I would recommend upgrading to CivilStorm or SewerGEMS. CivilStorm includes two dynamic solvers with more explicit/detailed analysis of pumps, plus the same GVF-Rational solver included with StormCAD. The file format is the same so you would be able to open your existing model.

In SewerGEMS, you also gain access to the GVF-Convex solver included with SewerCAD, which uses the standard EPANET solver for pressure/pump subnetworks. This would allow you to run a steady state simulation and look at pump performance, where the solver would use your pump definition to assess the operating point for example.

Mahmoud,

Since StormCAD was not designed for detailed pump analysis, it makes an appropriate assumption, showing you the pump flow equal to the wetwell inflow, with the pump head that would be necessary to overcome the static and dynamic lift for that flow and the upstream/downstream boundary conditions (wetwell HGL and downstream gravity main/outfall elevation).

If you need to do further analysis of pumping situations, I would recommend upgrading to CivilStorm or SewerGEMS. CivilStorm includes two dynamic solvers with more explicit/detailed analysis of pumps, plus the same GVF-Rational solver included with StormCAD. The file format is the same so you would be able to open your existing model.

In SewerGEMS, you also gain access to the GVF-Convex solver included with SewerCAD, which uses the standard EPANET solver for pressure/pump subnetworks. This would allow you to run a steady state simulation and look at pump performance, where the solver would use your pump definition to assess the operating point for example.