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Dimensionless Graphs of Floods

From Ruptured Dams

April 1980

Approved for Public Release. Distribution Unlimited. RD-8

US Army Corps

of EngineersHydrologic 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, searchingexisting data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding thisburden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to the Department of Defense, ExecutiveServices and Communications Directorate (0704-0188). Respondents should be aware that notwithstanding any other provision of law, no person shall besubject 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)April 1980

2. REPORT TYPEResearch Document

3. DATES COVERED (From - To)

5a. CONTRACT NUMBER

5b. GRANT NUMBER

4. TITLE AND SUBTITLEDimensionless Graphs of Floods From Ruptured Dams

5c. PROGRAM ELEMENT NUMBER

5d. PROJECT NUMBER

5e. TASK NUMBER

6. AUTHOR(S)CEIWR-HEC

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

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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 STATEMENTApproved for public release; distribution is unlimited.

13. SUPPLEMENTARY NOTES

.

14. ABSTRACTDams are subject to failure and the damages produced by the resulting flood are extensive. Alleviation or prevention of thedamaging effects requires the knowledge of the flood characteristics. These include primarily the time of arrival of the

flood-wave front, the maximum flood level and the time at which the maximum flood level occurs after dam failure.

Using a rational computation technique, based on the method of characteristics, dimensionless graphs of the aforementioned

flood characteristics were prepared for a prismatic channel of general parabolic cross section and several values of the

parameters involved. These values were selected to cover the practical range of the field conditions affecting the magnitude

of the dam-break flood. Results were obtained for such periods of time that the flood peak advanced adequatelydownstream and either subsided or stabilized considerably.

15. SUBJECT TERMSdams, floods, graphs, hydraulics, rivers, waves

16. SECURITY CLASSIFICATION OF: 19a. NAME OF RESPONSIBLE PERSON

a. REPORT

Ub. ABSTRACT

Uc. THIS PAGE

U

17. LIMITATIONOFABSTRACT

UU

18. NUMBEROFPAGES

76 19b. TELEPHONE NUMBER

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Dimensionless Graphs ofFloods From Ruptured Dams

April 1980

US Army Corps of EngineersInstitute for Water ResourcesHydrologic Engineering Center609 Second StreetDavis, CA 95616

(530) 756-1104(530) 756-8250 FAXwww.hec.usace.army.mil RD-8

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