UNCLASSIFIED 



SECURITY CLASSIFICATION OF THIS PAGE (When Data Entered) 



REPORT DOCUMENTATION PAGE 



READ INSTRUCTIONS 

 BEFORE COMPLETING FORM 



1. REPORT NUMBER 



CETA 77-7 



2. GOVT ACCESSION NO 



3. RECIPIENT'S CATALOG NUMBER 



4. TITLE (and Subtitle) 



PREDICTION OF IRREGULAR WAVE OVERTOPPING 



TYPE OF REPORT & PERIOD COVERED 



Coastal Engineering 

 Technical Aid 



6. PERFORMING ORG. REPORT NUMBER 



7. AUTHORfaJ 



John Ahrens 



8. CONTRACT OR GRANT NUMBERfe) 



9. PERFORMING ORGANIZATION NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center (CERRE-CS) 



Kingman Building, Fort Belvoir, Virginia 22060 



E31229 



11. CONTROLLING OFFICE NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center 



Kingman Building, Fort Belvoir, Virginia 22060 



REPORT DATE 



December 1977 



NUMBER OF PAGES 



20 



14. MONITORING AGENCY NAME a ADDRESSfy/ d/«oren( from Controlling Ollice) 



SECURITY CLASS, (of thla report) 



UNCLASSIFIED 



16. DISTRIBUTION STATEMENT (of thla Report) 



Approved for public release; distribution unlimited. 



17. DISTRIBUTION STATEMENT (ot the abetract entered In Block 20, If different from Report) 



18. SUPPLEMENTARY NOTES 



19. KEY WORDS (Continue 



aaary and Identity by block number) 



Irregular wave overtopping 

 Irregular wave runup 

 Irregular waves 



Wave overtopping 

 Wave runup 



ABSTRACT (Continue on reverse aide if neceeaary and Identify by block ntjmber) 



Rates of wave overtopping of structures can be predicted by means of an 

 equation presented in the Shore Protection Manual (SPM) (eg. 7-6, U.S. Army, 

 Corps of Engineers, Coastal Engineering Research Center, 1975; Weggel , 1976). 

 Implicit in the use of this equation is the assumption of monochromatic waves; 

 i.e., waves of uniform height and period. A question that arises is what 

 would the overtopping rate be for irregular wave conditions having a signifi- 

 cant height equal to the height of the monochromatic wave used in the SPM 



fcontinued") 



DD , ^^-3 1473 



EDITION OF t NOV 65 IS OBSOLETE 



UNCLASSIFIED 



SECURITY CLASSIFICATION OF THIS PAGE (When Data Entered) 



