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REPORT DOCUMENTATION PAGE 



READ INSTRUCTIONS 

 BEFORE COMPLETING FORM 



1. REPORT NUMBER 



CETA 80-3 



2. GOVT ACCESSION NO, 



3. RECIPIENT'S CATALOG NUMBER 



4. T\TLE (and Subtitle) 



COMPUTATION OF LONGSHORE ENERGY FLUX 

 USING LEO CURRENT OBSERVATIONS 



5. TYPE OF REPORT & PERIOD COVERED 



Coastal Engineering 

 Technical Aid 



6. PERFORMING ORG. REPORT NUMBER 



7. AUTHORfs; 



Todd L. Walton, Jr. 



8. CONTRACT OR GRANT NUMBERfsJ 



9. PERFORMING ORGANIZATION NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center (CEREN-EV) 



Kingman Building, Fort Belvoir, Virginia 22060 



D31181 



11. CONTROLLING OFFICE NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center 



Kingman Building, Fort Belvoir, Virginia 22060 



12. REPORT DATE 



March 1980 



13. NUMBER OF PAGES 



14. MONITORING AGENCY NAME ft ADDRESSfi/ dlHerent tram Controlling Ollice) 



15. SECURITY CLASS, (ol this report) 



UNCLASSIFIED 



16. DISTRIBUTION ST ATEMENT fo/ th/s ReporO 



Approved for public release; distribution unlimited. 



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



18. SUPPLEMENTARY NOTES 



19. KEY WORDS (Continue i 



aide If necessary and Identify by block number) 



Coastal engineering 



LEO 



Longshore energy flux 



20. ABSTI^ACT (Cantlmi* am rmvermm s£d> It nmcvanary mid Identify by block number) 



A computational technique is presented for the longshore energy flux factor, 

 Ppg, using current observations from the Littoral Environment Observation (LEO) 

 program. Chapter 4 of the Shore Protection Manual (SPM) gives various equations 

 for P^g as a function of wave height, wave period, and breaking wave angle. 

 The present report details how P^g can be calculated using longshore current 

 and breaking wave height data only. An example problem is given for this method 



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