Hydraulics and Hydrology
Tools and Models - WinTR-20

The TR-20 computer model has been completely rewritten. Input is now entered through a windows-based input editor.  The first official windows version (including programs, sample data, and documentation) is now complete.  The NRCS WinTR-20 program can be downloaded from this page.

The WinTR-20 development team has appreciated all the testing and comments we have received to date.  If you encounter any problems, or have comments on the version 1.00 computer program or enhancements to suggest please contact the WinTR-20 development team via e-mail to:  WinTR-20 Team.

Download WinTR-20

• Download WinTR-20, Version 1.00, (16.8 MB - last updated 1/2005).

WinTR-20 Program Support Materials

• WinTR-20 Readme file 
• Latest version of the WinTR-20 User Documentation   (3.4 MB)
• Latest version of the WinTR-20 User Guide  (6.7 MB)
• References on Time of Concentration with Respect to Sheet Flow   (59 kb)

NRCS Training Materials:

• Download the WinTR-20 Tutorial (8.42 MB)
• Download the Training Presentations (483 kb Zipped format)

The Natural Resources Conservation Service used government funds to develop the Technical Release 20 (WinTR-20) computer program. It may be downloaded for use and copying at no additional expense or license requirements.