UNCLASSIFIED 



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REPORT DOCUMENTATION PAGE 



READ INSTRUCTIONS 

 BEFORE COMPLETING FORM 



1. REPORT NUMBER 



MR 77-7 (VIII) 



2. GOVT ACCESSION NO. 



3. RECIPIENTS CATALOG NUMBER 



4. TITLE (and Subtitle) 



LABORATORY EFFECTS IN BEACH STUDIES* 

 Volume VIII. Analysis of Results from 10 

 Movable-Bed Experiments 



5. TYPE OF REPORT & PERIOD COVERED 



Miscellaneous Report 



6. PERFORMING ORG. REPORT NUMBER 



7. AUTHORO) 



Charles B. Chesnutt 



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 



D31192 



11. CONTROLLING OFFICE NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center 



Kingman Building, Fort Belvoir, Virginia 22060 



12. REPORT DATE 



June 1978 



13. NUMBER OF PAGES 



£7 ( %-S / ■ 



IS. SECURITY CLASS, (of this report) 



UNCLASSIFIED 



14. MONITORING AGENCY NAME a ADDRESSf// dlflerent from Controlling Ottlce) 



16. DISTRIBUTION STATEMENT (ol this Report) 



Approved for public release; distribution unlimited. 



17. DISTRIBUTION STATEMENT (ol the abstract entered In Block 20, It different from Report) 



18. SUPPLEMENTARY NOTES 



i. KEY WORDS (Continue on revet 



Breakers 

 Beach profiles 

 Coastal engineering 

 Currents 



side It necessary and Identity by block numbt 



Model studies 

 Movable-bed experiments 

 Wave envelopes 

 Wave generators 



Wave height variability 

 Wave reflection 

 Wave tanks 



20. ABSTRACT fCbntfinue ea revere* sfafls ft n ej u ea e ary end Identity by block number) 



Variation in wave reflection from a movable bed as it adjusted to the 

 impinging waves was the primary source of wave height variability in 10 

 experiments in 6- and 10-foot-wide wave tanks. Re-reflection of waves from 

 the wave generator, secondary waves, transverse waves, and cross waves also 

 contributed to the wave height variability. 



(continued) 



UNC LASSIFIE D 



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