PREFACE 



This report describes a technique for estimating the runup distribu- 

 tion of wind- generated waves, extending the method of runup prediction 

 for waves of constant height and period presented in the Shore Protection 

 Manual (SPM) (U.S. Army, Corps of Engineers, Coastal Engineering Research 

 Center, 1975). A method of correcting runup for slope roughness and 

 porosity, which is easier to apply than the SPM method, is also presented. 



This report was prepared by John Ahrens, Oceanographer, Coastal Struc- 

 tures Branch, under the general supervision of Dr. R.M. Sorensen, Chief, 

 Coastal Structures Branch. 



The author acknowledges the useful suggestions by Dr. R.M. Sorensen 

 and R.A. Jachowski, Chief, Coastal Design Criteria Branch, for improving 

 the manuscript. 



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. 



JOHN H. COUSINS 



Colonel, Corps of Engineers 



Commander and Director 



