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THE STORM WATER MANAGEMENT MODEL (SWMM) AND RELATED WATERSHED TOOLS DEVELOPMENT
Citation:
ROSSMAN, L. A. AND DENNIS LAI. THE STORM WATER MANAGEMENT MODEL (SWMM) AND RELATED WATERSHED TOOLS DEVELOPMENT. Presented at BOSC Water Quality Subcommittee Review of the Water Quality Research Program, Cincinnati, OH, January 04 - 05, 2006.
Impact/Purpose:
To inform the public
Description:
The Storm Water Management Model (SWMM) is a dynamic rainfall-runoff simulation model used for single event or long-term (continuous) simulation of runoff quantity and quality from primarily urban areas. It is the only publicly available model capable of performing a comprehensive analysis of wet weather loadings and control options for urban and developing watersheds of various sizes. Developed by EPA some 30 years ago and updated only intermittently since then, SWMM had become increasingly difficult to use and extend in today’s current desktop computing environment. To revitalize this valuable wet weather modeling tool, EPA-NRMRL partnered with CDM, Inc. through a CRADA to produce a complete rewrite of the SWMM model. Running under Windows, the redeveloped SWMM now provides an integrated environment for editing study area input data, running hydrologic, hydraulic and water quality simulations, and viewing the results in a variety of formats. In addition, two computer tools are being developed using SWMM’s runoff and sewer routing modules. The System for Urban Stormwater Treatment and Analysis Integration is a decision support framework for evaluation and placement of BMPs in urban watersheds. The Sanitary Sewer Overflow Analysis and Planning Toolbox will generate rainfall derived infiltration and inflow (RDII) to use as input into SWMM for performing capacity analysis of sanitary sewer systems.