SWAT | Soil and Water Assessment Tool

SWAT is a river basin scale model developed to quantify the impact of land management practices in large, complex watersheds. SWAT is a public domain model actively supported by the USDA Agricultural Research Service at the Grassland, Soil and Water Research Laboratory in Temple, Texas, USA. Read our fact sheet and disclaimer.

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Software Updates

ArcSWAT 2009.93.7b Sep. 9, 2011
For SWAT 2009 and ArcGIS 9.3 SP2
NOTE: Supplement mdb available if you are experiencing errors updating input files
SWAT Check July 22, 2011
Helps to identify POTENTIAL model input parameters issues
WGN Excel Macro - Download Manual
Used to calculate the weather station statistics needed to create user weather station files for SWAT
SWATeditor 2009.93.7a June 19, 2011
Companion to ArcSWAT
SWAT2009 rev. 477 April 19, 2011

More SWAT tools are available on our software page, including SWAT-CUP, MapWindow-SWAT, and VizSWAT.

Publications and Documentation

Upcoming Events

Apr 9-13, 2012	SWAT Workshops, College Station, TX SWAT for Beginners Advanced Data Processing for ArcSWAT SWAT for Advanced Users
May 27-Jun 1, 2012	Watershed Technology Conference, Bari, Italy Improving Water Quality and the Environment
May 27-Jun 1, 2012	SWAT Workshops, Bari, Italy SWAT for Beginners SWAT for Advanced Users
Jul 16-20, 2012	2012 International SWAT Conference Indian Institute of Technology New Delhi, India

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2011 SWAT Conference

Conference proceedings now available. Visit the conference website for video, presentations, and photos.

SWAT Videos

Watch instructional videos to learn how to use the Soil and Water Assessment Tool