PREFACE 
This report is published to provide coastal engineers empirical formulas 
for predicting wave reflection coefficients for beaches, revetments, and break- 
waters. The techniques were developed using laboratory data from a number of 
sources covering a wide range of conditions for both monochromatic and irregular 
waves. The work was carried out under the coastal processes program of the U.S. 
Army Coastal Engineering Research Center (CERC). 
This report was prepared by William N. Seelig, Hydraulic Engineer, and 
John P. Ahrens, Oceanographer, both of the Coastal Processes and Structures 
Branch, under the general supervision of Dr. K.M. Sorensen. J. McTamany, 
Coastal Oceanography Branch, provided the nonlinear regression analysis used 
to determine empirical coefficients developed in this report. 
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. 
vy : 
TED E. BISHOP 
Colonel, Corps of Engineers 
Commander and Director 
