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 BEFORE COMPLETING FORM 



1. REPORT NUMBER 



TR 82-3 



2. GOVT ACCESSION NO 



3. RECIPIENT'S CATALOG NUMBER 



4. TITLE (and Subtitle) 



DEPTH-LIMITED SIGNIFICANT WAVE HEIGHT: 

 A SPECTRAL APPROACH 



5. TYPE OF REPORT & PERIOD COVERED 



Technical Report 



6. PERFORMING ORG. REPORT NUMBER 



7. AUTHORfsJ 



C. Linwood Vincent 



8. CONTRACT OR GRANT NUMBERfsJ 



9. PERFORMING ORGANIZATION NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center (CERRE-CO) 



Kingman Building, Fort Belvoir, Virginia 22060 



A31592 



11. CONTROLLING OFFICE NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center 



Kingman Building, Fort Belvoir, Virginia 22060 



12. REPORT DATE 



August 1982 



13. NUMBER OF PAGES 



23 



14. MONITORING AGENCY NAME ft ADDRESSfi/ dlllerent Irom Controlling Ofllce) 



15. SECURITY CLASS, (of this report) 



UNCLASSIFIED 



16. DISTRIBUTION ST ATEMENT fo/ tft/s «opor(J 



Approved for public release; distribution unlimited. 



17. DISTRIBUTION STATEMENT (of the abs(rac( an(orod In Block 20, If different from Report) 



18. SUPPLEMENTARY NOTES 



19. KEY WORDS fConUnue 



nd Identify by block i 



Depth-limited wave height 



Spectral waves 



Wind wave energy 



2Q. ABSTRACT (*CQirtfaue ca rwverem atx£a ff rrmire-aaary aad identify by block number) 



A theoretical equation that describes the region of a wind wave spectrum 

 above the frequency of the spectral peak in a finite depth of water is used to 

 develop a method for estimating depth-limited significant wave height. The 

 theoretical background for the equation, along with supporting field and labora- 

 tory data, is given. The method indicates that significant wave height, defined 

 as four times the standard deviation of the wave record, is approximately 

 proportional to the square root of the water depth. 





MH 



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