SWAT Literature Database for Peer-Reviewed Journal Articles

Title:GIS and distributed watershed models. II: Modules, interfaces, and models 
Authors:Ogden, F. L., J. Garbrecht, P. A. DeBarry and L. E. Johnson 
Journal:Journal of Hydrologic Engineering 
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Broad Application Category:review/history 
Primary Application Category:model and/or data comparison 
Secondary Application Category:GIS interface, GIS utility, or other type of interface/utility 
Watershed Description:None 
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Abstract:This paper presents representative applications and models that can take advantage of spatially distributed data in a geographic information system (GIS) format for watershed analysis and hydrologic modeling purposes. The intention is to inform hydrologic engineers about the current capabilities of GIS, hydrologic analysis modules, and distributed hydrologic models, and to provide an initial guide on implementing GIS for hydrologic modeling. This paper also discusses key implementation issues for individuals and organizations that are considering making the transition to the use of GIS in hydrology. Widespread use of GIS modules and distributed watershed models is inevitable. The controlling factors are data availability, GIS-module development, fundamental research on the applicability of distributed hydrologic models, and finally, regulatory acceptance of the new tools and methodologies. GIS modules and distributed hydrologic models will enable the progression of hydrology from a field dominated by techniques that require spatial averaging and empiricism to a more spatially descriptive science.