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+
Updated 16 Feb 2023

June 2023 - Aarhus, Denmark

An International SWAT Conference and Workshops will be held 26-30 June 2023 at Aarhus University, Department of Ecoscience in Denmark. Registration open now.

Upcoming Workshops

There are no upcoming workshops scheduled at this time. Check back soon.

Software & Data Tools


SWAT+ rev. 60.5.4, QSWAT+ 2.3, SWAT+ Editor 2.2, SWAT+ Toolbox 1.0.1

16 Feb 2023

QGIS3 Interface to SWAT / Version 1.6

28 Nov 2022
SWAT2012 Model

Executables and source code / rev. 685

6 Sep 2022

ArcGIS Interface to SWAT / Version 2012.10.25

3 Jan 2023

Version 3

9 Jul 2019
Global Weather Data for SWAT

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


Calibration/uncertainty or sensitivity

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

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.