ABSTRACT
X — Y — Z XP-SWMM A computer program used for free-surface modeling, gravity system
modeling, and flow networks. It is an adaptation of the Stormwater Management Model (SWMM) by XP Software, Inc., of Portland, OR. XP-SWMM contains two layers for stormwater simulation (RUNOFF for surface water runoff and EXTRAN for channel, pump, weir, and conduit routing); two layers for sanitary sewer simulation (TRANSPORT for dryweather inflow and EXTRAN); and three layers for combined sewer simulation (RUNOFF, TRANSPORT, and EXTRAN). XP Software added many enhancements and error corrections to the 1989 release of the Environmental Protection Agency’s (EPA’s) SWMM 4.0. See Section II for further information.
