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REPORT DOCUMENTATION PAGE 



1. REPORT NUMBER 



CETA 83-1 



2. GOVT ACCESSION NO. 



4. T\T\.E (and Subtitle) 



CALCULATION OF WAVE SHOALING WITH 

 DISSIPATION OVER NEARSHORE SANDS 



7. AUTHORfa; 



Robert J. Hallermeier 



PERFORMING ORGANIZATION NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center (CERRE-CP) 



Kingman Building, Fort Belvoir, VA 22060 



11. CONTROLLING OFFICE NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center 



Kingman Building, Fort Belvoir, VA 22060 



t4. MONITORING AGENCY NAME & ADDRESSC/f cf//faren( from Controlllne Office) 



16. DISTRIBUTION STATEMENT (of thia 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 on reverae aide If neceaaary and Identity by block number) 



Agitated sand bed 

 Bottom friction 

 Energy dissipation 

 Nearshore waves 



Nonlinear wave propagation 

 Rough turbulent flow 

 Wave height 

 Wave shoaling 



20. ABSTRACT (Oanttoue aa pavers* ofA ff naj ca a am ey and. Identify by block number) 



This report provides a simplified calculation procedure for nearshore 

 wave height changes considering the energy dissipated by rough turbulent flow 

 over a strongly agitated bed of quartz sand. All elementary wave relation- 

 ships are from linear monochromatic wave theory, but one effect of including 

 dissipation is that calculated height changes depend on the absolute wave 

 height. The general effect of appreciable energy loss is to make field wave 

 height relatively constant outside the breaker zone. Example computations 

 and a calculator program are provided. 



M73 



EDrTlON OF I MOV 65 IS OBSOLETE 



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