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LANDSAT and Micro-GIS for Watershed Modeling

by Richard H. Berich, Purdum & Jeschke, Baltimore, MD, USA,
Michael B. Smith, Purdum & Jeschke, Baltimore, MD, USA,



Document Type: Proceeding Paper

Part of: Hydraulics and Hydrology in the Small Computer Age

Abstract:

A microcomputer-based Geographic Information System (GIS) incorporating LANDSAT or other remotely sensed digital data greatly reduces the cost of watershed modeling. The computation of hydrologic parameters such as Soil Conservation Service (SCS) runoff curve numbers is a significant task in watershed modeling. The GIS eliminates manual computation of SCS runoff curve numbers and SCS subbasin lag. Statistics for percentage of land use, soil types, and slope categories are produced in report format. GIS data is input directly into hydrologic models such as TR-20, HEC-1, and others.

Subject Headings: Computer models | Hydrologic models | Geographic information systems | Watersheds | Information systems | Sensors and sensing | Runoff curve number

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