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ENVIRONMENTAL TECHNOLOGY VERIFICATION REPORT: EVALUATION OF THE XP-SWMM STORMWATER WASTEWATER MANAGEMENT MODEL, VERSION 8.2, 2000, FROM XP SOFTWARE, INC.
Citation:
NSF INTERNATIONAL. ENVIRONMENTAL TECHNOLOGY VERIFICATION REPORT: EVALUATION OF THE XP-SWMM STORMWATER WASTEWATER MANAGEMENT MODEL, VERSION 8.2, 2000, FROM XP SOFTWARE, INC. EPA/600/R-05/091, 2005.
Impact/Purpose:
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Description:
XP-SWMM is a commercial software package used throughout the United States and around the world for simulation of storm, sanitary and combined sewer systems. It was designed based on the EPA Storm Water Management Model (EPA SWMM), but has enhancements and additional algorithms for the analysis of urban runoff and drainage. Simulation models like XP-SWMM are used for planning new systems, extending existing systems to accommodate growth, and to mitigate undesirable overflows and adverse water quality impacts. Testing of the XP-SWMM software was conducted from May through July 2002 at the offices of Crawford Engineering Associates. Evaluation of the XP-SWMM components provided insight into the interaction of many 'basic' functions commonly used in building models of actual systems, including the WIDTH parameter, used in RUNOFF to determine flow rates from a watershed, and infiltration simulations. Relationships between these types of functions are generally not transparent or even recognized by many potential modelers or users of models. Some of these interrelationships were revealed and highlighted during the testing of XP-SWMM to enhance user confidence in the model. The results from the testing conducted on the model components were comparable overall to results achieved with off-line calculations. In many instances, the model results were identical to the off-line results.