Abstract
An AnnAGNPS Nonpoint Source Pollution Model ArcGIS Interface Track: Water Resources Author(s): Sol Brich, Erik Nelson The South Dakota Department of Environment and Natural Resources (DENR) uses the annualized Agricultural Nonpoint Source (AnnAGNPS) pollution model to estimate factors affecting water quality in South Dakota watersheds. The model accounts for climate, topography, soils, and land use in its computations for runoff, sediment, and nutrients. The model is used to estimate nonpoint source pollutant loadings to South Dakota waters and determine the origins of the pollutants. Originally, AnnAGNPS used an Arcview 3.2 interface to derive input parameters. DENR and Bureau of Information and Technology (BIT) staff members have developed an interface utilizing ArcGIS. The new interface generates topographic input, which the model uses to delineate the watershed into cells. The interface then determines the primary soil and land use for each cell. These improvements have allowed users to model larger watersheds much faster and increased the ability of the user to analyze the model input spatially. Sol Brich State of South Dakota Environment and Natural Resources PMB 2020, SD DENR DFTA, 523 E Capitol Pierre , SD 57501 US Phone: (605)773-3122 Fax: (605)773-4068 E-mail: sol.brich@state.sd.us Erik Nelson State of South Dakota 523 E. Capitol Pierre , SD 57501 US Phone: 6057734254 E-mail: erik.nelson@state.sd.us |
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