SWAT Literature Database for Peer-Reviewed Journal Articles

Title:Effect of GIS data quality on small watershed stream flow and sediment simulations 
Authors:Di Luzio, M., J.G. Arnold and R. Srinivasan 
Journal:Hydrological Processes 
Volume (Issue):19(3) 
Article ID: 
URL (non-DOI journals): 
Broad Application Category:hydrologic and pollutant 
Primary Application Category:input data effects 
Secondary Application Category:sediment loss and transport 
Watershed Description:21.3 km^2 Goodwin Creek, a tributary of the Yazoo River located in the Bluff Hills region in northwest Mississippi, U.S. 
Calibration Summary: 
Validation Summary:1982-93 ranges (for different combinations of DEM, land use, & soil maps): surface runoff E = .87 - .97 surface runoff r2 = .90 - .95 --------------------------- sediment with finest land use map resolution: E = .61 - .66 r2 = .68 - .71 
General Comments:12 uncalibrated simulations were performed using combinations of 2 DEMs, 3 land use maps, and 2 soil maps. The coarsest DEM underestimated watershed area and surface runoff. The DEM resolution was found to definitely affected erosion and sediment yield estimates. The coarser land use maps were also found to significantly affect predicted runoff and sediment yields. The soil map resolution did not significantly impact results. Sediment E statistics degraded greatly when using the two coarser land use maps while sediment r2 values did not change much as a function of land use map. 
Keywords:watershed modelling; SWAT; ArcView; GIS; water runoff; sediment yield; TMDL; watershed delineation; DEM