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A SSURGO Pre-Processing Extension for the ArcView Soil and Water Assessment Tool

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Paper number  032123,  2003 ASAE Annual Meeting . (doi: 10.13031/2013.14952) @2003
Authors:   Joshua M. Peschel, Patricia K. Haan, Ronald E. Lacey
Keywords:   geographical information systems, GIS, soils, data processing, modeling, database

Soils represent a fundamental abiotic parameter in defining the characteristics of an ecosystem. The United States Department of Agriculture (USDA) Natural Resources Conservation Service (NRCS) produces the most detailed digital spatial data sets that are publicly available. The Soil Survey Geographic (SSURGO) Database contains basic attributes for the continuous coverage of soils across the United States. In its standard format, the SSURGO data set is incompatible for use within the ArcView Soil and Water Assessment Tool (SWAT). A modified version of the State Soil and Geographic (STATSGO) Database is the template soils data set used by ArcView SWAT. This paper presents the methodology and development of a SSURGO 2.0 dataset pre-processor extension for the ArcView SWAT model. A case study for the Leon Creek watershed near San Antonio, Texas is given. Results indicate that water yield differences occur when using the STATSGO and SSURGO data sets in the ArcView SWAT model under identical modeling conditions.

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