Applications of GIS for Water Quality Modeling in Agricultural and Urban Watershedsby Ming T. Lee, Illinois State Water Survey, Champaign, United States,
Michael L. Terstriep, Illinois State Water Survey, Champaign, United States,
Abstract: Two studies were conducted to integrate: 1) an agricultural nonpoint source pollution model, AGNPS, with Geographic Information System (GIS) databases, digital elevation model (DEM) data, and scanned image data; and 2) an urban runoff model, AUTO_QI, with a GIS macro language program (AML) and a user-friendly menu. These pilot studies GIS's showed spatial modeling capabilities for preparing input files and for determining pollutant sources and transport rates. Compared with all the available alternatives, the GIS provides an efficient tool for handling extensive spatial and tabular databases.
Subject Headings: Geographic information systems | Model analysis | Hydrologic models | Data processing | Water quality | Information systems | Municipal water | Watersheds
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