this is a manual of HEC-WAT Watershed Analysis Tool
This manual describes the HEC-WAT Watershed Analysis Tool, developed by the US Army Corps of Engineers Hydrologic Engineering Center. It provides a graphical interface to coordinate and streamline water resources studies using plug-ins for software like HEC-HMS, HEC-RAS, and others. The tool supports creating, managing, and visualizing studies, layers, and alternatives for modeling watershed systems.
The manual covers the tool’s main window, map windows, layers, schematics, and simulation management. It explains how to create and manage studies, add map layers, define stream alignments, and handle alternatives for scenario analysis. The tool is designed for multi-disciplinary teams and supports both large-scale and smaller studies like CAP (Continuing Authorities Program) projects.
HEC-WAT integrates software such as HEC-HMS, HEC-SSP, HEC-RAS, HEC-ResSim, HEC-DSSVue, HEC-FIA, and HEC-EFM.
Yes, the software can be downloaded for free from www.hec.usace.army.mil, but users must agree to the terms and conditions of usage.
The US Army Corps of Engineers does not provide technical support for non-Corps users; users should consult the software vendor list on the website.