PREFACE 



This report presents an evaluation of the Bretschneider and Reid (1954) 

 technique for calculating wave attenuation due to friction and shoaling using 

 data collected at the Coastal Engineering Research Center's ( CERC) Field 

 Research Facility (FRF), Duck, North Carolina. The work was carried out under 

 CERC's coastal engineering research program. 



The report was prepared by William G. Grosskopf, Hydraulic Engineer, under 

 the general supervision of Dr. C.L. Vincent, Chief, Coastal Oceanography 

 Branch, Research Division. 



Comments on this publication are invited. 



Approved for publication in accordance with Public Law 166, 79th Congress, 

 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 



