: Although the U.S. Army Corps of Engineers (HEC) officially tested and verified versions only up to ArcGIS 10.2, they direct users to Esri for newer versions.
To successfully run HEC-GeoHMS on ArcGIS 10.8, ensure your system meets these requirements:
: It is highly recommended to install the corresponding version of Arc Hydro Tools for ArcGIS 10.8 first, as GeoHMS often relies on Arc Hydro's underlying data structures. Why Switch to Modern Tools? download hec geohms for arcgis 108 exclusive
If you are starting a new project, consider moving away from HEC-GeoHMS for the following reasons: Runoff estimation using HEC-Geo HMS and ArcGIS/ArcMap
: Starting with HEC-HMS version 4.8 (released April 2021), GIS capabilities like watershed delineation and parameter estimation are built directly into the HEC-HMS software. : Although the U
: The Setup10_8 directory on Esri's server contains the specific installer designed for ArcMap 10.8.x. The Discontinuation of HEC-GeoHMS
: Because HEC-GeoHMS is no longer officially supported, you may encounter bugs in version 10.8, such as the "characteristic" tools (river length, slope, etc.) failing to execute. Installation Prerequisites Why Switch to Modern Tools
It is important to note that the HEC team is in developing or supporting HEC-GeoHMS.