PREFACE 



This report presents a method for estimating the magnitude and distribution 

 of wave runup and rundown on plane, smooth slopes caused by irregular wave 

 action. Within the method's range of applicability it supersedes Section 

 7.212, "Irregular Waves," of the Shore Protection Manual (U.S. Army, Corps of 

 Engineers, Coastal Engineering Research Center, 1977); CETA 77-2 "Prediction 

 of Irregular Wave Runup" by John P. Ahrens; and CETA 78-2 "Revised Wave Runup 

 Curves for Smooth Slopes" by Philip N. Stoa. It also supersedes the parts of 

 CETA 79-1 "Wave Runup on Rough Slopes," by Philip N. Stoa, which estimate wave 

 runup on rough and porous slopes by adjusting the runup for similar wave con- 

 ditions on smooth slopes using a rough-slope correction factor. 



This report was prepared by John P. Ahrens, Oceanographer , under the gen- 

 eral supervision of Dr. R.M. Sorensen, Chief, Coastal Processes and Structures 

 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 . 



SD E. BISHOP 

 Colonel, Corps of Engineers 

 Commander and Director 



