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I. REPORT NUMBER 



CETA 79-2 



2. GOVT ACCESSION NO 



3. RECIPIENTS CATALOG NUMBER 



4. TITLE (and Subtitle) 



A METHOD FOR ESTIMATING LONG-TERM EROSION 

 RATES FROM A LONG-TERM RISE IN WATER LEVEL 



5. TYPE OF REPORT & PERIOD COVERED 



Coastal Engineering 

 Technical Aid 



6. PERFORMING ORG. REPORT NUMBER 



7. AUTHORfs) 



J. Richard Weggel 



8. CONTRACT OR GRANT NUMBERfs; 



9. PERFORMING ORGANIZATION NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center (CEREN-EV) 



Kingman Building, Fort Belvoir, Virginia 22060 



F31232 



It. CONTROLLING OFFICE NAME AND ADDRESS 



' Department of the Army 

 Coastal Engineering Research Center 

 Kingman Building, Fort Belvoir, Virginia 22060 



12. REPORT DATE 



May 1979 



13. NUMBER OF PAGES 



NUMBER OF 



14. MONITORING AGENCY NAME & ADDRESSfJ/ dltferenl from Controlling Office) 



IS. SECURITY tLASS. (of thle report) 



UNCLASSIFIED 



16. DISTRIBUTION STATEMENT (ol this Report) 



Approved for public release; distribution unlimited. 



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



18. SUPPLEMENTARY NOTES 



19. KEY WORDS (Continue on reverae aide If neceaaary and Identity by block number) 



Beach profiles 

 Erosion rates 



Sediment transport 



20. ABSTRACT (Vooitnue ma revere* o£x£e ft rmcMMry ami Identity by block number) 



A method is presented for estimating long-term erosion rates resulting 

 from a rise in sea level. The method is based on Bruun's (1962) method with 

 an exponential curve fitted to the offshore beach profile. The exponential 

 profile establishes the beach profile closure depth beyond which it is assumed 

 waves do not move sand. An example problem using sea level rise data of Hicks 

 (1973) illustrates application of the technique. 





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