Stormwater Modeling and Management

In addition to modeling the generation and transport of runoff flows, GeoSWMM can also estimate the production of pollutant loads associated with this runoff. The following processes can be modeled for any number of user-defined water quality constituents:

Dry-weather pollutant buildup over different land uses

Pollutants wash-off from specific land uses during storm events

Direct contribution of rainfall deposition

Reduction in dry-weather buildup due to street cleaning

Reduction in wash-off load due to BMPs

Entry of dry-weather sanitary flows and user-specified external inflows at any point in the drainage system

Routing of water quality constituents through the drainage system

Reduction in constituent concentration through treatment in storage units or by natural processes in pipes and channels.