REPORT DOCUMENTATION PAGE
OMB No. 0704-0188
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1. AGENCY USE ONLY (Leave blank)
2. REPORT DATE
April 2018
3. REPORT TYPE AND DATES COVERED
Computer Program Documentation
4. TITLE AND SUBTITLE
HEC-RAS, River Analysis System Applications Guide
5. FUNDING NUMBERS
6. AUTHOR(S)
Gary W. Brunner, John C. Warner, Brent C. Wolfe, Steven S. Piper, and
Landon Marston
7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)
US ARMY CORPS OF ENGINEERS
HYDROLOGIC ENGINEERING CENTER (HEC)
609 Second Street
8. PERFORMING ORGANIZATION
REPORT NUMBER
CPD-70
9. SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES)
10. SPONSORING / MONITORING
AGENCY REPORT NUMBER
11. SUPPLEMENTARY NOTES
12a. DISTRIBUTION / AVAILABILITY STATEMENT
Approved for Public Release. Distribution is unlimited.
12b. DISTRIBUTION CODE
13. ABSTRACT (Maximum 200 words)
The U.S. Army Corps of Engineers’ River Analysis System (HEC-RAS) is software that allows you to perform one-
dimensional steady and unsteady flow river hydraulics calculations.
HEC-RAS is an integrated system of software, designed for interactive use in a multi-tasking, multi-user network
environment. The system is comprised of a graphical user interface (GUI), separate hydraulic analysis components, data
storage and management capabilities, graphics and reporting facilities.
The HEC-RAS system contains four one-dimensional hydraulic analysis components for: (1) steady flow water surface
profile computations; (2) unsteady flow simulation; (3) movable boundary sediment transport computations; and (4)
temperature and water quality constituent transport modeling.. A key element is that all four components use a common
geometric data representation and common geometric and hydraulic computation routines. In addition to the four hydraulic
analysis components, the system contains several hydraulic design features that can be invoked once the basic water surface
profiles are computed.
14. SUBJECT TERMS
water surface profiles, river hydraulics, steady and unsteady flow, One-dimensional and
two-dimensional hydrodynamics, computer program
15. NUMBER OF PAGES
517
16. PRICE CODE
17. SECURITY CLASSIFICATION
OF REPORT
18. SECURITY CLASSIFICATION
OF THIS PAGE
19. SECURITY CLASSIFICATION
OF ABSTRACT
20. LIMITATION OF
ABSTRACT
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