About GeoSWMM 2D

GeoSWMM 2D is an advanced extension of the GeoSWMM modeling tool, purpose-built to simulate both surface flooding and subsurface stormwater systems within urban environments. Designed to meet the needs of engineers, planners, and municipal stormwater professionals, the 2D modeling capabilities enable detailed analysis of overland water flow across streets, lots, and open terrain. With GeoSWMM 2D, users can visualize and quantify flood extents, depths, and flow velocities under various storm scenarios, making it an essential tool for accurate floodplain mapping, risk assessment, and infrastructure planning. Enhanced modeling accuracy is particularly valuable in areas prone to flash flooding or extreme weather events.

GeoSWMM 2D combines the strength of 1D pipe network simulation with dynamic 2D surface flow modeling. This integration accounts for real-world variability in terrain, land use, and hydrologic response. Using hydraulic structures such as orifices, weirs, or direct connections, GeoSWMM connects subsurface drainage and overland flow, enabling realistic modeling of urban drainage behavior under stress. Whether simulating a 2-year rainfall or a 100-year storm, GeoSWMM 2D delivers detailed outputs that support engineering decisions, regulatory compliance, and long-tern flood mitigation strategies across a variety of urban and suburban settings.