The Automated Geospatial Watershed Assessment tool

Scott N. Miller, Darius J. Semmens, David C. Goodrich, Mariano Hernandez, Ryan C. Miller, William G. Kepner, D. Phillip Guertin

Research output: Contribution to journalArticlepeer-review

125 Scopus citations


A toolkit for distributed hydrologic modeling at multiple scales using two independent models within a geographic information system is presented. This open-source, freely available software was developed through a collaborative endeavor involving two Universities and two government agencies. Called the Automated Geospatial Watershed Assessment tool (AGWA), this software is written for the ArcView GIS platform and is distributed as an extension via the Internet. AGWA uses commonly available GIS data layers to fully parameterize, execute, and visualize results from both the Soil and Water Assessment Tool (SWAT) and Kinematic Runoff and Erosion model (KINEROS2). These two distributed hydrologic models operate at different time scales and are suitable for application across a range of spatial scales. Descriptions of the GIS framework, hydrologic models, spatial analyses and algorithms that control the modeling process are given. Model requirements, limitations on the model applications and calibration techniques are described with examples of the use of AGWA for watershed modeling and assessment at a range of scales.

Original languageEnglish (US)
Pages (from-to)365-377
Number of pages13
JournalEnvironmental Modelling and Software
Issue number3
StatePublished - Mar 2007


  • Change analysis
  • Geographic information systems
  • Hydrologic modeling
  • SWAT
  • Scenario development

ASJC Scopus subject areas

  • Software
  • Environmental Engineering
  • Ecological Modeling


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