Application of GIS in Watershed Management.
This chapter presents a method to integrate a distributed watershed model with Geographic Information System (GIS) for management of soil erosion and fluvial sedimentation from nonpoint sources. Digitized data on soil, land use, topography and surface drainage pattern have been overlayed, using ArcInfo GIS, to generate input data file for the GAMES model. The GAMES output on erosion and sediment yield has been analyzed, using GIS, to prepare watershed maps to describe spatial distribution of soil erosion losses, sediment contributing areas and problem categories. This approach provides a powerful and faster technique for preparation of input file and interpretation of output of NPS and hydrologic models.
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