PREFACE 



This report provides a calculation procedure for nearshore shoaling of 

 energetic waves outside the breaker zone, including the appreciable effects of 

 energy dissipation over a strongly agitated sand bed. The work reported was 

 conducted under the U.S. Airmy Coastal Engineering Research Center's (CERC) 

 Numerical Modeling of Shoreline Response to Coastal Structures work unit. Shore 

 Protection and Restoration Research Program, Coastal Engineering Area of Civil 

 Works Research and Development. 



The present treatment replaces guidance previously provided in CERC Field 

 Guidance Letter No. 79-04 and CERC Technical Paper No. 80-8 (Grosskopf, 1980). 

 Those publications incorrectly recommend the use of friction coefficients for 

 inert beds in computing nearshore wave shoaling. 



The report was written by Dr. Robert J. Hallermeier, Oceanographer , under 

 the general supervision of Mr. R.P. Savage, Chief, Research Division, CERC. 



Technical Director of CERC was Dr. Robert W. Whalin, P.E. 



Comments on this publication are invited. 



Approved or publication in accordance with Public Law 166, 79th Congi 

 approved 31 July 1945, as supplemented by Public Law 172, 88th Congress, 

 approved 7 November 1963. 



TED E. BISHOP 



Colonel, Corps of Engineers 



Commander and Director 



