The Soil and Water Assessment Tool (SWAT) is a public domain model jointly developed by USDA Agricultural Research Service (USDA-ARS) and Texas A&M AgriLife Research, part of The Texas A&M University System. SWAT is a small watershed to river basin-scale model to simulate the quality and quantity of surface and ground water and predict the environmental impact of land use, land management practices, and climate change. SWAT is widely used in assessing soil erosion prevention and control, non-point source pollution control and regional management in watersheds. Read our fact sheet and disclaimer.

Software Updates

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

Publications and Documentation

Upcoming Events

May 19-23, 2014
Central Eastern European SWAT Workshop
Warsaw, Poland
Beginner and advanced workshops
Register by April 30!
Jul 28-Aug 1, 2014
2014 International SWAT Conference & Workshops
Pernambuco, Brazil
Registration now open!
Submit your abstracts by May 1
Sep 1-5, 2014
SWAT Workshops, College Station, TX
SWAT for Beginners
SWAT for Advanced Users
Sep 22-26, 2014
SWAT International Summer School
Pula (CA), Sardinia - Italy
Beginner and advanced workshops
Abstracts submission deadline Sep. 1
Registration deadline Sep. 12

Looking for recent job opportunities related to SWAT? Browse our listing.

Group Photo - 2013 Toulouse, France

2013 SWAT Conference

The 2013 conference took place July 17-19 in Toulouse, France. Conference proceedings, presentations, video, and photos are available.


SWAT Videos

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

Reviewers Needed!

We are looking for help reviewing SWAT peer-reviewed journal papers from the community. Please sign up as a volunteer.