ee UNCLASS EEE 
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READ INSTRUCTIONS 
REPORT DOCUMENTATION PAGE 
1. REPORT NUMBER 2. GOVT ACCESSION NO. 3. RECIPIENT'S CATALOG NUMBER 
MR 77-7 (VII) 
4. TITLE (and Subtitle) 5. TYPE OF REPORT & PERIOD COVERED 
LABORATORY EFFECTS IN BEACH STUDIES 
Volume VII. Movable-Bed Experiments With 
Ho/Lo = 0.013 
Miscellaneous Report 
6. PERFORMING ORG. REPORT NUMBER 
7. AUTHOR(a) 8. CONTRACT OR GRANT NUMBER(s) 
Charles B. Chesnutt 
Robert P. Stafford 
10. PROGRAM ELEMENT, PROJECT, TASK 
AREA & WORK UNIT NUMBERS 
9. PERFORMING ORGANIZATION NAME AND ADDRESS 
Department of the Army 
Coastal Engineering Research Center (CERRE-CP) 
Kingman Building, Fort Belvoir, Virginia 22060 
D31192 
12. REPORT DATE 
March 1978 
13. NUMBER OF PAGES 
of RE a- 
15. SECURITY CLASS. (of thie report) 
UNCLASSIFIED 
11. CONTROLLING OFFICE NAME AND ADDRESS 
Department of the Army 
Coastal Engineering Research Center 
Kingman Building, Fort Belvoir, Virginia 22060 
14. MONITORING AGENCY NAME & ADDRESS(if different from Controlling Office) 
1Sa. DECLASSIFICATION/ DOWNGRADING 
SCHEDULE 
16. DISTRIBUTION STATEMENT (of this Report) 
Approved for public release; distribution unlimited. 
17. DISTRIBUTION STATEMENT (of the abstract entered in Block 20, if different from Report) 
18. SUPPLEMENTARY NOTES 
19. KEY WORDS (Continue on reverse side if necessary and identify by block number) 
Breakers Model studies Wave height variability 
Beach profiles Movable-bed experiments Wave reflection 
Coastal engineering Wave envelopes Wave tanks 
Currents Wave generators 
20. ABSTRACT (Cantinue on reverse side if neceasary and identify by block number) 
In two experiments with a wave period of 2.35 seconds on an initial 
movable-bed slope of 0.10 in tanks 6 and 10 feet wide, significant differ- 
ences in profile shape and wave height variability developed. Secondary wave 
and re-reflection effects resulting from the 38.3-foot difference in distance 
from the wave generator to the profile toe caused differences in the shape of 
the offshore zone. The 0.15-foot gap at the end of the generator blade in the 
10-foot tank and the critical combination of wavelength and tank width 
continued 
DD , FORM , 1473 ~—s Evrmion oF 1 Nov 65 1S OBSOLETE 
aaron UNCLASSIFIED 
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