Analyzing digital terrain information, HEC-GeoHMS transforms the drainage paths and watershed boundaries into a hydrologic data structure that represents the watershed response to precipitation. HEC-GeoHMS provides an integrated work environment with data management and customized toolkit capabilities, which includes a graphical user interface with menus, tools, and buttons. The program features terrain-preprocessing capabilities in both interactive and batch modes. Additional interactive capabilities allow users to construct a hydrologic schematic of the watershed at stream gages, hydraulic structures, and other control points. See our Order Form to order a copy of the HEC-HMS program.
Terrain models can obtain geometric attributes such as area, slope and runoff distances.
Many display options are provided to aid in modeling and understanding the drainage characteristics of terrain surfaces. CAP follows USGS standardized procedures for computing flow through culverts. It can be used to develop stage-discharge relationships for culverts and to determine discharge through culverts from high water marks. It will compute flows for rectangular, circular, pipe arch, elliptical, and other nonstandard shaped culverts. To download a free copy of the program, go to our Free Software pages.