Submitted to: ASA-CSSA-SSSA Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: November 4, 2004
Publication Date: November 4, 2004
Citation: Green, C.H., Di Luzio, M., Tomer, M.D., Arnold, J.G., James, D.E. 2004. Swat model development for a large agricultural watershed in Iowa [CD-ROM]. ASA-CSSA-SSSA Proceedings. Madison, WI.
The SWAT (Soil and Water Assessment Tool) water quality model is designed to assess nonpoint and point pollution and conduct agricultural management scenario comparison. The model's simulation accuracy is evaluated with hydrologic monitoring data collected from the South Fork watershed in Iowa. This watershed represents the most intensive region for row crop and livestock production in the Midwest. The model in its latest version, ArcView-SWAT-extendable
(AVSWATX) is being applied using the interface with ArcView 3.3 GIS software. AVSWATX provides an extendable environment including the optional usage of Soil Survey Geographic (SSURGO) data maps and derived soil parameters. Land use-land cover input maps and classes are primarily based on the National Agricultural Statistics Service (NASS) Crop Data Layer 2002 enhanced by Iowa Gap analysis data. Climate data from 1990 to 2004 is incorporated. Three years of crop rotation and conservation practice data are combined to establish management scenarios' effects on the impairment of South Fork watershed waters. Initial results of hydrologic and water quality validation will be presented.