Downloading WinTR20 1.0.0024 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available. The software lies within Education Tools, more precisely Science Tools.
We recommend checking the downloaded files with any free antivirus. WinTR-55.exe is the most common filename for this program's installer. This free PC software is developed for Windows XP/Vista/8/10/11 environment, 32-bit version. The following version: 1.0 is the most frequently downloaded one by the program users. This free tool was originally designed by USDA NRCS.
From the developer:
The Computer Program for Project Formulation Hydrology (WinTR-20) is a single event watershed scale runoff and routing model. It computes direct runoff and develops hydrographs resulting from any synthetic or natural rainstorm. Developed hydrographs are routed through stream and valley reaches as well as through reservoirs.
Hydrographs are combined from tributaries with those on the main stream.
You may want to check out more software, such as SatCalc, MathMatic or MemBrain, which might be similar to WinTR20.