HEC-RAS Verification and Validation Tests

HEC-RAS

Verification and Validation Tests

April 2018

Approved for Public Release. Distribution Unlimited.

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Research Document

April 2018

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HEC-RAS Verification and Validation Tests

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6. AUTHOR(S)

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Gary W. Brunner, CEIWR-HEC-HHT

Dr. Alejandro Sanchez, CEIWR-HEC-HHT

Dr. Tom Molls, David Ford Consulting Engineers

Dr. David A. Parr, University of Kansas

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U.S .Army Corps of Engineers

Institute for Water Resources

Hydrologic Engineering Center (CEIWR-HEC)

609 Second Street

Davis, CA 95616-4687

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Approved for public release; distribution is unlimited.

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14. ABSTRACT

This research document summarizes all of the test cases performed in order to verify and validate the HEC-RAS

one-dimensional Steady and Unsteady Flow computational code, as well as the two-dimensional Unsteady Flow

Computational code.

The purpose of performing these tests with HEC-RAS is to demonstrate that the HEC-RAS computational code is

working correctly, as well as to demonstrate how well the software performs against analytical, text book,

laboratory, and real world (field) datasets with measured data. Test datasets include: Analytical solutions to a

range of problems; tests from well know hydraulic text books; comparisons with well know laboratory datasets;

and comparisons with well gaged real world datasets.

15. SUBJECT TERMS

HEC-RAS; River Analysis System; HEC; Hydrologic Engineering Center; two-dimensional; R&D; research &

development; United Kingdom; research project; models; hydraulic; benchmarking; test; grid cell sizes; grid;

bathymetry; cell face; terrain; elevation; flow solver; time steps; result; water surface; velocities; computational

interval

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Standard Form 298 (Rev. 8/98)

Prescribed by ANSI Std. Z39-18

HEC-RAS

Verification and Validation Tests

April 2018

U.S. Army Corps of Engineers

Institute for Water Resources

Hydrologic Engineering Center

609 Second Street

Davis, CA 95616

(530) 756-1104

(530) 756-8250 FAX

hec.usace.army.mil

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RD-52

Table of Contents

Table of Contents

Chapter

Page

2.2.1 Standard Step Backwater Test ................................................................................. 3

2.2.2 One-Dimensional Transcritical Flow over a Bump without Friction ...................... 5

2.3.1 Flow over a Drop Structure ..................................................................................... 7

2.4.1 Beaver Creek Bridge ............................................................................................. 11

3.2.1 Standard Step Backwater Test ............................................................................... 17

3.4.1 San Joaquin Canal Test ......................................................................................... 19

3.4.2 Lower Columbia River System Test ..................................................................... 22

4.2.1

4.2.2

4.2.3

4.2.4

4.2.5

4.2.6

4.2.7

4.2.8

4.2.9

Standard Step Backwater Test ............................................................................... 31

Subcritical Flow over a Variable Sloping Bed ...................................................... 33

Flow over a Bump without Friction ...................................................................... 36

Flood Wave Propagation over a Flat Bed.............................................................. 39

Dam Break over a Flat Frictionless Bed................................................................ 44

Sloshing in a Rectangular Basin ............................................................................ 48

Long-wave Run-up on a Planar Slope ................................................................... 52

Surface Runoff on a Plane ..................................................................................... 55

Rectangular Basin with Coriolis............................................................................ 59

4.3.1

4.3.2

4.3.3

4.3.4

4.3.5

Flow in a Compound Channel ............................................................................... 62

Flow in a Rectangular Channel with a Sudden Expansion .................................... 65

Two-Dimensional Surface Runoff ........................................................................ 79

Rectangular Channel with a 180-Degree Bend ..................................................... 83

Sudden Dam Break in a Rectangular Flume ......................................................... 88

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