Storm Water Management Model (SWMM) is freely downloadable from https://www.epa.gov/water-research/storm-water-management-model-swmm#downloads. SWMM was first developed in 1971 and has undergone several major upgrades since then. In this study we are using the Version 5.0 (SWMM 5). The development of SWMM 5 was pursued under a Cooperative Research and Development Agreement between the Water Supply and Water Resources Division of the U.S. Environmental Protection Agency and the consulting engineering firm of Camp Dresser & McKee Inc. The project team consisted of the following individuals: Lewis Rossman (contact information unknown) Trent Schade (contact information unknown), Daniel Sullivan (contact information unknown) from US EPA; Robert Dickinson (e-mail: email@example.com, address: 9340 Pontiac Drive Tampa, Florida 33626, phone: 813-712-0664), Carl Chan (e-mail: chanCC@cdm.com, address: 151 North Delaware St., Suite 1520, Indianapolis, IN 46204), Edward Burgess (e-mail: burgessEH@cdm.com, address: 8805 Governor's Hill Drive, Suite 260, Cincinnati, OH 45249) from CDM. SWMM 5 is designed to run under the Windows operating system of an IBM/Intel-compatible personal computer, the program language is C and the size is 5 MB.