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An Introduction to the USEPA Storm Water Management Model (SWMM)
Citation:
Simon, M. An Introduction to the USEPA Storm Water Management Model (SWMM). Udani Thani SWMM Meeting, Udon Thani, THAILAND, August 29 - September 02, 2022.
Impact/Purpose:
The purpose of this presentatation is to introduce Udon Thani municipal workers to SWMM at the request of the US Army Corp of Engineers.
Description:
This presentation will introduce the Storm Water Management Model (SWMM). SWMM is used throughout the world for planning, analysis, and design related to stormwater runoff, combined and sanitary sewers, and other drainage systems in urban areas. There are many applications for drainage systems in non-urban areas as well. SWMM is a dynamic hydrology-hydraulic water quality simulation model. It is used for single event or long-term (continuous) simulation of runoff quantity and quality from primarily urban areas. The runoff component operates on a collection of sub-catchment areas that receive precipitation and generate runoff and pollutant loads. The routing portion transports this runoff through a system of pipes, channels, storage/treatment devices, pumps, and regulators. SWMM tracks the quantity and quality of runoff made within each sub-catchment. It tracks the flow rate, flow depth, and quality of water in each pipe and channel during a simulation period made up of multiple time steps. SWMM 5 has been extended to model the hydrologic performance of specific types of low impact development (LID) controls. SWMM 5.2 has additional hydraulic features, such as the Preissmann slot node surcharge calculation, dual drainage features, and additional pump and storage container curves. The presentation will also demonstrate the new version the Stormwater Calculator 3.4 and SWMM-CAT plug-in with updated meteorological and climate change data.