The Watershed Modeling System (WMS) is a comprehensive
graphical modeling environment for all phases of watershed
hydrology and hydraulics. WMS includes powerful tools to
automate modeling processes such as automated basin
delineation, geometric parameter calculations, GIS overlay
computations (CN, rainfall depth, roughness coefficients,
etc.), cross-section extraction from terrain data, and
more! WMS supports hydrologic modeling with HEC-1,
HEC-HMS, TR-20, TR-55, Rational Method, NFF, MODRAT, OC
Rational, HSPF, xpswmm, and EPA-SWMM. Hydraulic models
supported include HEC-RAS, xpswmm, EPA-SWMM, SMPDBK, and
CE-QUAL-W2. 2D distributed hydrologic models (including
channel hydraulics and groundwater interaction) can now be
created with GSSHA, developed by the US Army Corps of
Engineers. All modeling is handled by a GIS-based data
processing framework that makes the task of watershed
modeling and mapping easier than ever before.

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