The Soil & Water Assessment Tool is a small watershed to river basin-scale model used 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.


Introducing SWAT+, a completely revised version of the SWAT model. SWAT+ provides a more flexible spatial representation of interactions and processes within a watershed.

Download SWAT+

2018 SWAT Conference - Brussels, Belgium

The 2018 International SWAT Conference drew 170 attendees from 50 countries with more than 150 oral and poster presentations on the Soil and Water Assessment Tool (SWAT).

Photos and presentations are available to download and watch now.

Watch Presentations

Call for Papers

The following SWAT special issue journals are accepting submissions. You do not need to have presented at a SWAT conference in order to submit a paper.

Upcoming Workshops

Special Issue for East Asia

Application of the China Meteorological Assimilation Driving Datasets for the SWAT Model (CMADS) in East Asia

Deadline for manuscript submissions: 31 December 2018

Call for Abstracts

An integrated modeling workshop, sponsored by Cornell University and Iowa State University, will be held at the David R Atkinson Center, Cornell University, Ithaca, NY during April 3-5, 2019.  Abstracts are being solicited that describe integration of SWAT, Agricultural Policy/Environmental eXtender (APEX) and/or other ecohydrological or environmental models, with economic models or other types of models. 

2018 AGU Fall Meeting

The 2018 AGU Fall Meeting in Washington, D.C. will take place 10-14 December. There will be several sessions on the applications of SWAT and other watershed simulation models.

Software & Data Tools

Global Weather Data for SWAT

Climate Forecast System Reanalysis (CFSR) data from 1979-2014


QGIS Interface to SWAT / Version 1.7

8 Oct 2018

ArcGIS Interface to SWAT / Version 2012.10.21

1 Oct 2018
SWAT Editor

Modify SWAT Inputs / Version 2012.10.21

1 Oct 2018
SWAT2012 Model

Executables and source code / rev. 670

1 Oct 2018

Calibration/uncertainty or sensitivity / Version

June 2018
WGN Parameters Estimation Tool

Using Microsoft Access / Version 0.18.03

17 Apr 2018
WET - Water Ecosystems Tool

Advanced lake and reservoir modeling coupled to SWAT

SWAT Check

Identify potential model input problems / Version

6 Nov 2018

Job Opportunities

Looking for job opportunities related to SWAT and/or watershed modeling? Check out our listing.

Reviewers Needed

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