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READ INSTRUCTIONS 

 BEFORE COMPLETING FORM 



1. REPORT NUMBER 



CETA 77-2 



2. GOVT ACCESSION NO 



3. RECIPIENT'S CATALOG NUMBER 



4. TITLE fond Subtitle; 



PREDICTION OF IRREGULAR WAVE RUNUP 



5. TYPE OF REPORT & PERIOD COVERED 



Coastal Engineering 

 Technical Aid 



6. PERFORMING ORG. REPORT NUMBER 



7. AUTHORfs) 



John Ahrens 



8. CONTRACT OR GRANT NUMBERf.) 



9. PERFORMING ORGANIZATION NAME AND ADDRESS 



Department of the Army- 

 Coastal Engineering Research Center (CERRE-CS) 

 Kingman Building, Fort Belvoir, Virginia 22060 



E31229 



II. CONTROLLING OFFICE NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center 



Kingman Building, Fort Belvoir, Virginia 22060 



12. REPORT DATE 



July 1977 



13. NUMBER OF PAGES 

 14 



14. MONITORING AGENCY NAME & ADDRESSfi/ different from Controlling Ollice) 



15. SECURITY CLASS, (of this report) 



UNCLASSIFIED 



16. DISTRIBUTION STATEMENT (ol thle Report) 



Approved for public release; distribution unlimited. 



17. DISTRIBUTION STATEMENT (ol the abstract entered In Block 20, It dltlerent from Report) 



18. SUPPLEMENTARY NOTES 



19. KEY WORDS (Continue 



asary and identity by block i 



Design techniques 

 Irregular wave runup 

 Runup 



Waves 



Wind- generated waves 



20. ABSTRACT (Continue on reverse aide If necessary and identify by block number) 



A technique for predicting the runup distribution of wind-generated waves 

 is presented which extends the traditional method of runup prediction for 

 regular waves (constant period and height) presented in the Shore Protection 

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

 Center, 1975). The basic assumption is that runup has a Rayleigh distribution 

 of the type commonly associated with wave heights. This technique appears 

 conservative but reasonable for predicting extreme values of runup for design 

 (continued) 



DD ,3 



1473 



EDITION OF 1 NOV 65 IS OBSOLETE 



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