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1. REPORT NUMBER 



CETA 81-17 



2. GOVT ACCESSION NO 



3. RECIPIENT'S CATALOG NUMBER 



4. TITLE (and Subtitle) 



IRREGULAR WAVE RUNUP ON SMOOTH SLOPES 



TYPE OF REPORT & PERIOD COVERED 



Coastal Engineering 

 Technical Aid 



6. PERFORMING ORG. REPORT NUMBER 



7. AUTHORfsJ 



John P. Ahrens 



8. CONTRACT OR GRANT NUMBER(s) 



PERFORMING ORGANIZATION NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center (CERRE-CS) 



Kingman Building, Fort Belvoir, Virginia 22060 



D31229 



11. CONTROLLING OFFICE NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center 



Kingman Building, Fort Belvoir, Virginia 22060 



REPORT DATE 



December 1981 



NUMBER OF PAGES 

 26 



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



SECURITY CLASS, (of this report) 



UNCLASSIFIED 



16. DISTRIBUTION ST ATEMENT (ot this Report) 



Approved for public release; distribution unlimited, 



17. DISTRIBUTION ST ATEMEN T (ol the abstract entered In Block 20, If ditierent from Report) 



18. SUPPLEMENTARY NOTES 



19. KEY WORDS (Continv 



ssary and identity by block number) 



Irregular waves 

 Smooth plane slopes 



Wave rundown 

 Wave runup 



20. ABSTRACT (Continue on rev 



aide 11 necessary and Identity by block number) 



The results of several laboratory studies have been used to develop a 

 method to estimate the wave runup and rundown on plane, smooth slopes caused 

 by irregular wave action. Curves and equations are presented which can be 

 used to compute the 2-percent runup, significant runup, mean runup, and 

 approximate lower limit of rundown. A procedure is suggested for adapting 

 the smooth-slope results to wave runup on rough and porous slopes. Example 

 problems illustrate the use of the material presented. 



DD ,3 



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