The Arc Hydro installer will NOT overwrite an existing installed version. If you have a previous version of Arc Hydro installed, you must uninstall it first.

By following these steps, you should now have Arc Hydro Tools installed and ready to use with ArcGIS 10.7. Happy analyzing!

Click the download link to save the .exe installation file. Installation Guide for ArcGIS 10.7 Follow these steps to install the tool properly:

The primary and official location for all Arc Hydro versions is the Arc Hydro Tools Downloads page Esri website Requesting Access

ArcGIS Desktop is highly sensitive to version compatibility regarding extensions.

Navigate to the top menu menu bar and click > Extensions .

Complete Guide: Download Arc Hydro Tools for ArcGIS 10.7 To perform advanced water resource modeling in ArcMap, you must . Arc Hydro is a free, specialized extension developed by Esri that extends the standard capabilities of ArcMap. It allows hydrologists and GIS analysts to perform terrain preprocessing, delineate watersheds, and build complex hydro-geometrical networks.