While the Official HEC Download Page primarily lists versions up to 10.2, the 10.8 setup file is available via ESRI's Arc Hydro storage: HEC-GeoHMS Setup 10.8 Third-Party Alternative: SoftDeluxe HEC-GeoHMS 10.8.0.10 Informer Tech Portal: HEC-GeoHMS 10.8 Free Download System Requirements & Prerequisites
Apache HTTP Server (for specific reporting tools, though optional for basic delineation). download hec geohms for arcgis 108 exclusive
: Ensure your DEM is in a Projected Coordinate System before starting your project to avoid "Object reference not set to an instance of an object" errors. While the Official HEC Download Page primarily lists
: As of April 2021, HEC no longer supports HEC-GeoHMS. Its features (delineation, basin characteristics, etc.) have been integrated directly into HEC-HMS version 4.8 download hec geohms for arcgis 108 exclusive