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REPORT DOCUMENTATION PAGE 



READ INSTRUCTIONS 

 BEFORE COMPLETING FORM 



1. REPORT NUMBER 



CETA 79-6 



2. GOVT ACCESSION NO. 



3. RECIPIENT'S CATALOG NUMBER 



4. TITLE (and Subtitle) 



ESTIMATION OF WAVE TRANSMISSION COEFFICIENTS 

 FOR PERMEABLE BREAKWATERS 



5. TYPE OF REPORT a PERIOD COVERED 



Coastal Engineering 

 Technical Aid 



6. PERFORMING ORG. REPORT NUMBER 



7. AUTHORfs; 



William N. Seelig 



8. CONTRACT OR GRANT NUMBERfe; 



9. PERFORMING ORGANIZATION NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center (CERRE-CS) 



Kingman Building, Fort Belvoir, Virginia 22060 



F3153J 



11. CONTROLLING OFFICE NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center 



Kingman Building, Fort Belvoir, Virginia 22060 



12. REPORT DATE 



October 1979 



13. NUMBER OF PAGES 



22 



14. MONITORING AGENCY NAME a ADDRESSf// di//eren( from Controlling Olllce) 



15. SECURITY CLASS, (of thia report) 



UNCLASSIFIED 



16. .DISTRIBUTION STATEMENT (of thla Report) 



Approved for public release; distribution unlimited. 



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



18. SUPPLEMENTARY NOTES 



19. KEY WORDS (Continue • 



aide If necesaary and Identify by block number) 



Permeable breakwaters 

 Transmission coefficients 

 Wave transmission 



20. ABSTRACT (CaatBxum am r«ver»* aftfo // rtaice^aary aad. ideniify by block number) 



The Madsen and IVhite (1976) analytical model of wave transmission through 

 permeable breakwaters is combined with a wave transmission by overtopping formula 

 to provide a method of predicting wave transmission coefficients for permeable 

 breakwaters. Comparison of this combined prediction technique with physical 

 model laboratory tests shows that the technique is useful for estimating trans- 

 mission coefficients for design. A computer program was found the most conven- 

 ient method of making predictions. The computer program and an example showing 

 program use are included in an Appendix. 



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