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ArcSWAT

The ArcSWAT is a ArcGIS-ArcView extension and a graphical user input interface for the SWAT (Soil and Water Assessment Tool) model (Arnold et al., 1998). SWAT is a river basin, or watershed, scale model developed to predict the impact of land management practices on water, sediment, and agricultural chemical yields in large, complex watersheds with varying soils, land use, and management conditions over long periods of time. The model is physically based and computationally efficient, uses readily available inputs and enables users to study long-term impacts. For a detailed description of SWAT, see Soil and Water Assessment Tool Theoretical Documentation and User's Manual, Version 2005 (Neitsch et al., 2005a; 2005b), published by the Agricultural Research Service and the Texas Agricultural Experiment Station, Temple Texas.

Download ArcSWAT for SWAT 2005 Version

ArcSWAT for ArcGIS 9.3 will be available in late fall 2008 or early spring 2009.

For help installing ArcGIS 9.2 and ArcSWAT, read the installation instructions and the ArcSWAT FAQ.

• ArcSWAT 2.1.4a for ArcGIS 9.2 SP6 Install (65 MB), released 12/19/2008
  HTTP Download | FTP Download
• ArcSWAT 2.1.4 for ArcGIS 9.2 SP5 Install (65 MB), released 12/1/2008
  HTTP Download | FTP Download

  IMPORTANT: Please read the release notes before installing ArcSWAT 2.1.4.

• ArcSWAT 2.0.0 for ArcGIS 9.2 Install (76 MB), released 2/15/2008
  HTTP Download | FTP Download
  

  IMPORTANT: Please read the release notes before installing ArcSWAT 2.0.0.

• SWATeditor 2.1.4 Install (16 MB), released 1/1/2009
  HTTP Download | FTP Download
• SWATeditor 2.0.0 Install (20 MB), released 3/7/2008
  HTTP Download | FTP Download
  SWATeditor is a companion software to ArcSWAT. SWATeditor reads the project database generated by ArcSWAT interface to edit swat input files, execute SWAT run, perform sensitivity, autocalibration and uncertainty analysis. This is a standalone program and does not require ArcGIS, thus helping users of ArcSWAT to share their project with others that do not have ArcGIS or much experience with GIS in general. In order to use the SWATeditor, the users need to have created an ArcSWAT project under the "write all" menu.
• ArcSWAT 1.0.7 for ArcGIS 9.1 Install (74 MB), released 2/21/2008
  HTTP Download | FTP Download
  

  ArcSWAT 1.0.7 is the final release for ArcGIS 9.1

Key Procedures

• Load or select the ArcSWAT extension
• Delineate the watershed and define the HRUs (including landuse, soil, and slope as a unique HRU)
• (Optional) Edit SWAT databases
• Define the weather data
• Apply the default input files writer
• (Optional) Edit the default input files
• Set up (requires specification of simulation period, PET calculation method, etc.) and run SWAT
• (Optional) Apply a calibration tool
• (Optional) Analyze, plot and graph SWAT output (VizSWAT)

System Requirements

The SWAT2005/ArcSWAT 1.0 Interface requires:

Hardware:

• Personal computer using a Pentium IV processor or higher, which runs at 2 gigahertz or faster
• 1 GB RAM minimum
• 500 megabytes free memory on the hard drive for minimal installation and up to 1.25 gigabyte for a full installation (including sample datasets and US STATSGO data)

Software (ArcSWAT 1.0 for ArcGIS 9.1 version):

• Microsoft Windows XP, or Windows 2000 operating system with most recent kernel patch*
• ArcGIS-ArcView 9.1 with service pack 2 (Build 766)
• ArcGIS Spatial Analyst 9.1 extension
• ArcGIS Developer Kit (usually found in C:\Program Files\ArcGIS\DeveloperKit\)
• ArcGIS DotNet support (usually found in C:\Program Files\ArcGIS\DotNet\)
• Microsoft .Net Framework 1.1
• Adobe Acrobat Reader version 7 or higher

* Microsoft constantly updates the different versions of windows. This interface was developed with the latest version of Windows and may not run with earlier versions. Patches are available from Microsoft.

ArcSWAT Group

This group is established to exchange ideas, help each other and report any bugs related to the interface.

• Visit the ArcSWAT Group