UNCLASSIFIED 
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REPORT DOCUMENTATION PAGE : AES Cote ee 
1. REPORT NUMBER 2. GOVT ACCESSION NO.) 3. RECIPIENT'S CATALOG NUMBER 
MR 77-7 (V) 
4. TITLE (and Subtitle) 5. TYPE OF REPORT & PERIOD COVERED 
LABORATORY EFFECTS IN BEACH STUDIES 
Volume V. Movable-Bed Experiment With Miscellaneous Report 
Ho /L, = 0.039 6. PERFORMING ORG. REPORT NUMBER 
- AUTHOR(s) 8. CONTRACT OR GRANT NUMBER(s) 
Charles B. Chesnutt 
Robert P. Stafford 
- PERFORMING ORGANIZATION NAME AND ADDRESS 10. PROGRAM ELEMENT, PROJECT, TASK 
Department of the Army AREA & WORK UNIT NUMBERS 
Coastal Engineering Research Center (CERRE-CP) 
Kingman Building, Fort Belvoir, Virginia 22060 D31192 
- CONTROLLING OFFICE NAME AND ADDRESS 12. REPORT DATE 
Department of the Army December 1977 
Coastal Engineering Research Center TEES NUMBERIOGIOAGES 
Kingman Building, Fort Belvoir, Virginia 22060 62 le 
14. MONITORING AGENCY NAME & ADDRESS(if different from Controlling Office) 15. SECURITY CLASS. (of thie report) 
UNCLASSIFIED 
15a, DECL ASSIFICATION/ DOWNGRADING 
SCHEDULE 
- DISTRIBUTION STATEMENT (of this Report) 
Approved for public release; distribution unlimited. 
- DISTRIBUTION STATEMENT (of the abstract entered in Block 20, if different from Report) 
- SUPPLEMENTARY NOTES 
- KEY WORDS (Continue on reverse side if necessary and identify by block number) 
Breakers Movable-bed experiments Wave height variability 
Coastal engineering Wave envelopes Wave reflection 
Currents Wave generators Wave tanks 
Model studies 
| ABSTRACT (Continue ex reverse side if necessary and identify by block number) 
In an experiment with a wavelength of 10.26 feet (wave period = 1.50 
seconds) on an initial movable-bed slope of 0.10 in a tank 10 feet wide with 
waves directed normal to the initial shoreline, the foreshore and inshore 
changes of the profile were three-dimensional to such an extent that a long- 
shore current developed at the base of the foreshore. Comparable experiments 
in the same facility, but with a longer wavelength, did not show three- 
dimensional effects to as great an extent. As a working hypothesis, it is 
(continued) 
FORM 
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