Applications of GIS for Water Quality Modeling in Agricultural and Urban Watersheds

by Ming T. Lee, Illinois State Water Survey, Champaign, United States,
Michael L. Terstriep, Illinois State Water Survey, Champaign, United States,

Document Type: Proceeding Paper

Part of: Hydraulic Engineering


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: Water quality | Geographic information systems | Water pollution | Agricultural wastes | Municipal water | Watersheds | Urban areas | Information systems

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