SWMM 5 now has the capability to compute the amount of surface runoff flow captured by street inlet structures and sent into a below ground drainage system using the FHWA HEC-22 methodology (see ...

I had tested when v5.2 came out and noticed that the inlet code does not account for submergence on the inlet. In the tutorial, it suggests that if you set the rim of the downstream node at the inlet ...

The accuracy of rainfall runoff modeling plays a crucial role in the simulation and evaluation of hydrological processes. Numerous physical parameters need to be determined when modeling using SWMM.