iiNrr.As.qTFTFn 



SECURITY CLASSIFICATION OF THIS PAGE (When Data Entered) 



REPORT DOCUMENTATION PAGE 



READ INSTRUCTIONS 

 BEFORE COMPLETING FORM 



1. REPORT NUMBER 



MR 77-7 



2. GOVT ACCESSION NO. 



3. RECIPIENT'S CATALOG NUMBER 



«. TITLE (end Subtitle) 



LABORATORY EFFECTS IN BEACH STUDIES 

 Volume III. Movable-Bed Experiments With 

 U^/Lo = 0.021 (1971) 



5. TYPE OF REPORT a PERIOD COVERED 



Miscellaneous Report 



6. PERFORMING ORG. REPORT NUMBER 



7. AUTHORfo; 



Charles B. Chesnutt 

 Robert P. Stafford 



8. CONTRACT OR GRANT NUMBERfsJ 



9. PERFORMING ORGANIZATION NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center (CERRE-CP) 



Kingman Building, Fort Belvoir, Virginia 22060 



031192 



11. CONTROLLING OFFICE NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center 



Kingman Building, Fort Belvoir, Virginia 22060 



12. REPORT DATE 



November 1977 



13. NUMBER OF PAGES 



111' > \o f 



14. MONITORING AGENCY NAME 8 ADDRESSfy/ d///eren( from Controlling Office) 



IS. SECURITY CLASS, (of this report) 



UNCLASSIFIED 



16. DISTRIBUTION STATEMENT (of thia 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 revere 



'~^ Breakers 



Coastal engineering 



Currents 



Model studies 



Je If necessary and Identify by block number) 



Movable-bed experiments Wave height variability 

 Wave envelopes ^, ' Wave reflection 

 Wave generators ,■.■ , •<P'Wave tanks 



20. ABSTRACT CCanitmje aa r*veram attfi* ff n*c»>TO«ry and Identify by block number) 



Two movable-bed experiments were conducted in 6- and 10-foot-wide wave tanks 

 for 375 and 335 hours, respectively, with a wave period of 1.90 seconds and 

 a generated wave height of 0.36 foot. 



Significant lateral variations occurred in the profile development rate and 

 profile shape in the 10-foot tank, which did not occur in the 6-foot tank, 

 indicating that tank width can affect the study of littoral processes in 



movable-bed experiments. 



(Continued) 



on ""^ 



EOrTlON OF t NOV 6S IS OBSOLETE 



UNCLASSIFIED 



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