NRCS Geo-Hydro - ArcView GIS Interface to WinTR-20

摘要

The NRCS Geo-Hydro system will develop input for the Natural ResourcesrnConservation Service (NRCS) WinTR-20 hydrologic model from GIS data. RequiredrnGIS layers which need to be developed by the user for import to the interface includernelevation, land use, and hydrologic soil group. A stream location layer is optional butrnrecommended. The user may also import any other layers which would be useful inrnlocating a watershed such as political boundaries, roads, etc. These data are availablernfor much of the United States through the NRCS Geospatial Data Gateway and otherrnsources.rnThe WinTR-20 computer program is used to estimate peak discharge and runoffrnvolume from watersheds for use in designing water control structures and inrndetermining impacts of changing land use on the hydrologic system.rnNRCS Geo-Hydro is based upon the ArcView GIS program from EnvironmentalrnSystems Research Institute (ESRI). The following software requirements arernnecessary to operate NRCS Geo-Hydro: ArcView GIS Version 3.2 or 3.3, ArcViewrnSpatial Analyst Extension version 1.1 or greater, NRCS Geo-Hydro ArcView projectrnand databases. Even though the system is point-and-click, basic familiarity with GISrnoperations and hydrologic analysis is recommended. NRCS Geo-Hydro is organizedrnto automate the process used in a typical watershed hydrologic analysis. Its operationrnis grouped into a series of menus, buttons, and tools which are designed to be used inrna sequential manner. Further refining or use of advanced WinTR-20 options mayrnthen be accomplished through the use of the WinTR-20 Controller/Editor. NRCSrnGeo-Hydro and WinTR-20 systems have comprehensive user guides, trainingrnmaterial, example data, and other technical documentation.