News
SWAT+
31 August 2015
A new modular version of SWAT, SWAT+, is under development! The new version will have a much-improved modular design and input file structure to facilitate addition of new and improved algorithms and subroutines. The simplified structure will be easier for users and developers to understand, and it should stimulate exchange of algorithms with other models. The new SWAT code and associated software should be available on the SWAT website before the 2016 International SWAT Conference in Beijing.
There will be a special session at the upcoming Purdue Conference, Oct. 14-16, covering the new SWAT code, input/output file structure, test datasets and a developers’ interface.
For more information contact Dr. Jeff Arnold (Jeff.Arnold@ars.usda.gov).
SWAT Version Control
24 August 2015
JAVA Forge has been selected for SWAT version control. The site will include all SWAT revisions, notes, and the code for each model version. It can be obtained at: javaforge.com/svn/swatmodel. Any SWAT user can become a Java Forge member, create a login, and contact Nancy Sammons (nancy.sammons@ars.usda.gov) for access to the SWAT site
SWATlite for the World
17 August 2015
Because of SWATlite’s simplified input requirements and speed of execution, it is being used to simulate subbasin hydrology and soil erosion for the entire world. Preliminary runs for the major continents have already been executed, and the project can serve as a foundation for more complex analyses using the complete full SWAT model. Contact Dr. Srinivasan (r-srinivasan@tamu.edu) for more information.
- Land use: available at 30 m and larger grids.
- Digital elevation: USGS, 1 km resolution.
- Daily weather: generated from CFSR.
- Soils: FAO, 1:1 million.
SWAT-DEG to SWATlite
10 August 2015
SWAT-DEG is a simplified version of SWAT2012. Originally developed by Peter Allen (Peter_Allen@baylor.edu) and Jeff Arnold (Jeff.Arnold@ars.usda.gov), it greatly simplifies hydrology and plant growth and does not simulate nutrients, concentrating on gulley formation and stream degradation (deepening and widening). Because of its rapid execution time and simplified input requirements, it is finding a number of previously unanticipated applications. As a result, SWAT-DEG has been renamed SWATlite and will soon be available on the SWAT web site. Contact Drs. Allen or Arnold for more information.
SWAT-MODFLOW
3 August 2015
Ryan Bailey (rtbailey@engr.colostate.edu) has incorporated MODFLOW into SWAT to facilitate integrated surface water – ground water assessments. The model has been applied to watershed-aquifer systems in Colorado USA, and in several Pacific islands. Anyone interested in obtaining this software should contact Dr. Bailey.
A one-day SWAT-MODFLOW workshop will be offered at Purdue University, October 13. A three-day international SWAT conference will follow. Register and learn more!
Representative Watersheds of the World
28 July 2015
A continuous, long-term effort has begun to document and make available example SWAT projects for representative watersheds around the world. These SWAT projects are being contributed by their developers to assist other users by making available input and output data for representative large and small watersheds in every corner of the world. The work was begun by Hendrik Rathjens (hrathjen@purdue.edu) and Katrin Bieger (kbieger@brc.tamus.edu). Scientists contributing their SWAT projects will benefit from the large number of citations expected to be generated by use of the models in peer-reviewed papers. Representative watersheds that will soon be available on the SWAT website include: Little River in Tifton, Georgia; Middle Bosque River in Central Texas; and Wildcat Creek in Indiana. Other watersheds with good measured data for model validation will be added in the near future. If you would like to contribute a SWAT project to this data base, contact Dr. Jeff Arnold (Jeff.Arnold@ars.usda.gov).