US Army Corps of Engineers
Hydrologic Engineering Center

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HEC-HMS

Release Notes Description of the changes that occurred at each new release including bug repairs, new capabilities, and changes in operation.
Current Version:
HEC-HMS Release Notes Version 4.12-beta.3, November 2023

User's Manual (CPD-74A) Description of the use and application of the program.
Current Version:
HEC-HMS User's Manual Version 4.12-beta.3, November 2023

Technical Reference Manual (CPD-74B) Discussion of the technical underpinnings of the program including theoretical basis, parameter estimation techniques, and application suggestions.
Current Version:
Current Version

Applications Guide (CPD-74C) Illustrates application of the program to studies typical of those undertaken by Corps’ offices.
Current Version:
Current Version

Validation Guide Description of the validation testing procedures used to determine that the software is operating correctly during a numerical simulation. The project files used for testing are also available in a data kit.
Current Version:
Current Version
 Download Data Kit (1.3 GB)

Additional Resources Other documents and reports related to the development or use of the program.
Implementing the HEC-HMS Program Interface in Alternate Language
Developing Reports Using Extensible Stylesheet Language> 
 Download Example Stylesheet

Recommended Citation for HEC-HMS Documentation
Hydrologic Engineering Center. <Document and Version>. <Page Title>. <Retrieval Date>, from <Website Url>

Example Citation for HEC-HMS Documentation
Hydrologic Engineering Center. HEC-HMS User’s Manual version 4.7.
Selecting a discretization method. Retrieved February 18, 2021, from https://www.hec.usace.army.mil/confluence/hmsdocs/hmsum/4.7/subbasin-elements/selecting-a-discretization-method