UNCLASSIFIED 



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 BEFORE COMPLETING FORM 



1. REPORT NUMBER 



CETA 81-2 



2. GOVT ACCESSION NO. 



3. RECIPIENT'S CATALOG NUMBER 



4. TITLE fand Subtitle; 



SEAWARD LIMIT OF SIGNIFICANT SAND TRANSPORT BY 

 WAVES: AN ANNUAL ZONATION FOR SEASONAL PROFILES 



5. TYPE OF REPORT a PERIOD COVERED 



Coastal Engineering 

 Technical Aid 



6. PERFORMING ORG. REPORT NUMBER 



7. AUTHORfsJ 



Robert J. Hallermeier 



B. CONTRACT OR GRANT NUMBERrs) 



PERFORMING ORGANIZATION NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center (CERRE-CS) 



Kingman Building, Fort Belvoir, Virginia 22060 



D31193 



It. CONTROLLING OFFICE NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center 



Kingman Building, Fort Belvoir, Virginia 22060 



12. REPORT DATE 



January 1981 



13. NUMBER OF PAGES 

 23 



U. MONITORING AGENCY NAME a ADDRESSfi/ dy/Zerent from Controlling Ollice) 



IS. SECURITY CLASS, (ol this report; 



UNCLASSIFIED 



16. DISTRIBUTION STATEMENT (ol thie Report) 



Approved for public release, distribution unlimited. 



17. DISTRIBUTION STATEMENT (ol the abstract entered In Block 20, If different from 



18. SUPPLEMENTARY NOTES 



9. KEY WORDS (Contii 



ieach profiles 

 Beach zones 



sary and Identify by block number) 



Coastal engineering 

 Coastal processes 



Sand transport 

 Seaward limit 



Wave climate application 

 Wave-sand interactions 



ABSTRACT (Continue on reverae aide If neceaaary and Identify by block number) 



Sand characteristics and annual wave statistics at a site are used to deter- 

 mine two water depths bounding a shoal zone on the beach profile. This zonation 

 is based on two thresholds of wave-induced sand agitation, so that expected waves 

 during a year have neither strong nor negligible effects on the sand bottom with 

 in the shoal zone. The calculation procedure and representative results for the 

 shoal zone bounds are presented to supplement techniques for estimating a seaward 

 limit of significant sand transport given in the Shore Protection Manual (SPM) . 

 calculator program is provided. 



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