HEC-GeoRAS remains a cornerstone for hydraulic engineers transitioning spatial data between GIS and hydraulic modeling software. While newer versions of ArcGIS Pro have introduced different workflows, many professionals still rely on the stability of ArcGIS 10.8 for their HEC-RAS projects.
With HEC-RAS 5.0+ supporting 2D flow, HEC-GeoRAS 10.2.1 adds limited but useful tools: hec georas for arcgis 10.8
Note: For full 2D preprocessing, many engineers now use (built into HEC-RAS) or QGIS with Crayfish . However, ArcGIS 10.8 remains excellent for 1D and combined 1D/2D setups. hec georas for arcgis 10.8
: Always project your elevation data (DEM) into a local Projected Coordinate System (PCS) before starting to avoid projection "leftover" issues. hec georas for arcgis 10.8