Defines the locations where HEC-RAS will calculate water surface elevations.

The following system requirements must be met to run HEC GeoRAS for ArcGIS 10.8:

After running the hydraulic simulation in HEC-RAS, this menu reads the exported data to visualize results.

: The recommended version for users on ArcGIS 10.8 is HEC-GeoRAS 10.8.0.3 .

Open ArcMap, navigate to Customize > Extensions , and check the boxes for 3D Analyst and Spatial Analyst . Close ArcMap.

: HEC-GeoRAS subtracts the underlying terrain elevations from the Water Surface TIN. Step 3: Generating Final Outputs

: Built directly into HEC-RAS 5.0 and newer, this tool replicates and enhances most GeoRAS features—such as terrain processing and result mapping—without requiring a separate GIS license. ArcGIS Pro Compatibility

This is the heart of pre-processing:

Establishes the river network and connectivity.

Converting 1D or 2D HEC-RAS result files ( .sdf ) into GIS shapefiles for mapping. 2. Installation and Setup for ArcGIS 10.8

The post-processing workflow yields two vital raster outputs:

Use HEC-GeoRAS for ArcGIS 10.8 if your team relies heavily on established 1D modeling workflows. However, for new projects, investing time in learning HEC-RAS Mapper is highly recommended.