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 shown in the figure. error seems to be in Explicit Solver (jump in EGL).

(I have set Routing time step and SWMM output increment to 1 min in Explicit solver with Slot surcharge method). Further, the runoff method is SCS CN method.

Any advice that I can fix this issue in the explicit solver? (As I have to simulate it in Explicit Solver)

Thanks

Nishadi

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