lINrT.A.S.STFTF.n 



SECURITY CLASSIFICATION OF THIS PAGE (When Data Entered) 



REPORT DOCUMENTATION PAGE 



READ INSTRUCTIONS 

 BEFORE COMPLETING FORM 



1. REPORT NUMBER 



TP 77-9 



2. GOVT ACCESSION NO 



3. RECIPIENT'S CATALOG NUMBER 



4. TITLE (and Subtitle) 



CALCULATING A YEARLY LIMIT DEPTH TO THE 

 ACTIVE BEACH PROFILE 



5. TYPE OF REPORT 4 PERIOD COVERED 



Technical Paper 



6. PERFORMING ORG. REPORT NUMBER 



7. AUTHORfoJ 



Robert Jo Hallermeier 



8. CONTRACT OR GRANT NUMBERfoJ 



9. PERFORMING ORGANIZATION NAME AND ADDRESS 



Department of the Array 



Coastal Engineering Research Center (CERRE-CP) 



Kingman Building, Fort Belvoir, Virginia 22060 



D31193 



II. CONTROLLING OFFICE NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center 



Kingman Building, Fort Belvoir, Virginia 22050 



12. REPORT DATE 



September 1977 



13. NUMBER OF PAGES 



28 



U. MONITORING AGENCY NAME 4 ADDRESSf// d///oren( from Controlling Ottlce) 



IS. SECURITY CLASS, (ot this report) 



UNCLASSIFIED 



16. DISTRIBUTION ST ATEMENT fo/ th/» ReporO 



Approved for public release, distribution unlimited. 



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



18. SUPPLEMENTARY NOTES 



19. KEY WORDS (Continue on rereree tide It neceaaary and Identity by block number) 



Beach profiles Sediment entrainment 



Coastal engineering Sediment transport 



Coastal processes Wave-sediment interaction 



20. ABSTRACT fCbzTtCaua aa ravaraa mi^ tt nac ea a ary aad Identity by block number) 



A sediment entrainment parameter is used to calculate the maximum water 

 depth for intense agitation of a sand bed by shoaling waves with given height 

 and period. Calculated depths agree with measured water depths over a terrace 

 cut into a fine sand slope by constant laboratory waves. For high wave con- 

 ditions expected 12 hours per year on exposed U.S. coasts, the calculated 

 depth is about twice the wave height and agrees with published conclusions on 

 the yearly seaward limit to the active beach profile. 



on ""^ 



1473 



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