Our software library provides a free download of GSSHA 6.1. The actual developer of the free software is Byrd Aaron, Coastal and Hydraulics Laboratory. The software is included in Education Tools.
The following versions: 6.1, 6.0 and 5.7 are the most frequently downloaded ones by the program users. The latest installation package occupies 2.4 MB on disk. Our antivirus scan shows that this download is malware free. This PC program works fine with 32-bit and 64-bit versions of Windows XP/Vista/7/8/10/11.
From the developer:
Gridded Surface Subsurface Hydrologic Analysis (GSSHA) is a grid-based two-dimensional hydrologic model that features 2D overland flow, 1D stream flow, 1D infiltration, 2D groundwater and full coupling between the groundwater, vadoze zone, streams and overland flow. The fully coupled groundwater to surfacewater interaction allows GSSHA to model both Hortonian and Non-Hortonian basins.
You may want to check out more software, such as StatPlus, StarCalc or Water And Steam Properties for Windows, which might be related to GSSHA.