Comparative Analysis of Flood Routing Methods · Comparative Analysis of Flood Routing Methods...
Transcript of Comparative Analysis of Flood Routing Methods · Comparative Analysis of Flood Routing Methods...
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Comparative Analysis of Flood Routing Methods September 1980 Approved for Public Release. Distribution Unlimited. RD-24
US Army Corps of Engineers Hydrologic Engineering Center
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Standard Form 298 (Rev. 8/98) Prescribed by ANSI Std. Z39-18
REPORT DOCUMENTATION PAGE Form Approved OMB No. 0704-0188
The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to the Department of Defense, Executive Services and Communications Directorate (0704-0188). Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ORGANIZATION. 1. REPORT DATE (DD-MM-YYYY) September 1980
2. REPORT TYPE Research Document
3. DATES COVERED (From - To)
5a. CONTRACT NUMBER
5b. GRANT NUMBER
4. TITLE AND SUBTITLE Comparative Analysis of Flood Routing Methods
5c. PROGRAM ELEMENT NUMBER
5d. PROJECT NUMBER 5e. TASK NUMBER
6. AUTHOR(S) Theodor Strelkoff, Hydraulic Engineer 43 Liberty Street San Francisco, CA 94110 5F. WORK UNIT NUMBER
7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) US Army Corps of Engineers Institute for Water Resources Hydrologic Engineering Center (HEC) 609 Second Street Davis, CA 95616-4687
8. PERFORMING ORGANIZATION REPORT NUMBER RD-24
10. SPONSOR/ MONITOR'S ACRONYM(S) 9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES) 11. SPONSOR/ MONITOR'S REPORT NUMBER(S)
12. DISTRIBUTION / AVAILABILITY STATEMENT Approved for public release; distribution is unlimited. 13. SUPPLEMENTARY NOTES This work was performed under contract (DACW0-80-P-0323) to the Hydrologic Engineering Center. 14. ABSTRACT Given inflow hydrographs were routed downstream using several different techniques. The resulting outflow and stage hydrographs were then compared. The standard for comparison was chosen to be the solution of the one-dimensional Saint-Venant equations. The approximate techniques considered were the zero-inertia equations, kinematic-wave model, and Modified-Puls with optional subdivision of the reach lengths. The effect of floodplains was considered in contrast to channels of simple cross section. Downstream boundary conditions consisted of one of the following: normal-depth stage-discharge relation, broad-crested overflow weir, or free overfall. Dimensionless graphs of hydrograph-peak attenuation and arrival time as computed by the various techniques are presented. The accuracy of the approximate techniques is found to depend on the values of certain dimensionless parameters. This suggests numerical limits on those parameters for application of a particular method. Application of the results to prototype conditions is demonstrated in a companion report titled "Modified-Puls Routing in Chuquatonchee Creek", RD-23. 15. SUBJECT TERMS flood routing, unsteady flow, hydrologic vs. hydraulic routing, modified-puls, kinematic wave, zero inertia, St. Venant 16. SECURITY CLASSIFICATION OF: 19a. NAME OF RESPONSIBLE PERSON a. REPORT U
b. ABSTRACT U
c. THIS PAGE U
17. LIMITATION OF ABSTRACT UU
18. NUMBER OF PAGES 134 19b. TELEPHONE NUMBER
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Comparative Analysis of Flood Routing Methods
September 1980 Prepared by: Theodor Strelkoff, Hydraulic Engineer 43 Liberty Street San Francisco, CA 94110 Prepared for: US Army Corps of Engineers Institute for Water Resources Hydrologic Engineering Center 609 Second Street Davis, CA 95616 (530) 756-1104 (530) 756-8250 FAX www.hec.usace.army.mil RD-24
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