SWAT Model Software

The objective of the SWAT Model is to predict the effect of management decisions on water, sediment, nutrient and pesticide yields with reasonable accuracy on large, ungaged river basins.

(rev. 622, March 4, 2014)

The SWAT2012 source code and input/output documentation is also available. 
Read the SWAT changes from revision 481 to revision 621.

Download the SWAT executable for Linux (rev. 583, January 17, 2013).

Other Versions of the SWAT Model

SWAT2009
SWAT2005
SWAT2000

Released November 1, 2000, BASINS version: April 18, 2001

SWAT2000 is the version incorporated into EPA's BASINS 3.0 release. This version of the model is the culmination of many months of code review and improvement and incorporates numerous changes.

SWAT99.2

SWAT99.2 is being made available for modelers wishing to use the SWAT Windows (non-GIS) interface. Until we update the Windows interface to run with SWAT2000, the Windows interface for SWAT99.2 and the source code for SWAT99.2 will remain available from the web site.

We strongly urge new users and current users of SWAT99.2 to move to SWAT2000 and take advantage of the many improvements made to the model.

SWAT98.1

SWAT98.1 is being made available for modelers wishing to use the SWAT/GRASS interface. Until we update the SWAT/GRASS interface to run with SWAT2000, the SWAT/GRASS interface for SWAT98.1 and the source code for SWAT98.1 will remain available from the web site.

We strongly urge new users and current users of SWAT98.1 to move to SWAT2000 and take advantage of the many improvements made to the model.

Documentation: