REPORT DOCUMENTATION PAGE 



Form Approved 

 OMB No. 0704-0188 



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 Office of Management and Budget, Paperwork Reduction Project (0704-01 88), Washington, DC 20503. 



1 . AGENCY USE ONLY (Leave blank) 



2. REPORT DATE 



May 1993 



3. REPORT TYPE AND DATES COVERED 



Final report 



4. TITLE AND SUBTITLE 



Coastal Scour Problems and Methods for Prediction of Maximum Scour 



5. FUNDING NUMBERS 



6. AUTHOR(S) 



Jimmy E. Fowler 



7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) 



U.S. Army Engineer Waterways Experiment Station 



Coastal Engineering Research Center 



3909 Halls Ferry Road, Vicksburg, MS 39180-6199 



8. PERFORMING ORGANIZATION 

 REPORT NUMBER 



Technical Report CERC-93-8 



9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES) 



U.S. Army Corps of Engineers 

 Washington, DC 20314-1000 



10. SPONSORING/MONITORING 

 AGENCY REPORT NUMBER 



11. SUPPLEMENTARY NOTES 



Available from National Technical Information Service, 5285 Port Royal Road, Springfield, VA 22161. 



12a. DISTRIBUTION/AVAILABILITY STATEMENT 



Approved for public release; distribution is unlimited. 



12b. DISTRIBUTION CODE 



1 3. ABSTRACT (Maximum 200 words) 



The most common coastal scour-related problems are toe scour at rubble-mound structures and vertical seawalls, 

 and scour at the base of piles and horizontal pipelines. Existing scour prediction methods for these problems vary 

 from rules of thumb to empirically derived equations to theoretically derived relationships. Recent studies at the 

 U.S. Army Engineer Waterways Experiment Station's Coastal Engineering Research Center indicate that sufficient 

 design guidance exists for vertical walls, pipelines, and vertical piles; however, additional research is still needed for 

 rubble-mound structures. 



14. SUBJECT TERMS 



Coastal Moveable bed model Scour prediction 

 Flume studies Physical model Seawall 

 Irregular waves Scour Sedimentation 



15. NUMBER OF PAGES 



65 



16. PRICE CODE 



17. SECURITY CLASSIFICATION 

 OF REPORT 



UNCLASSIFIED 



18. SECURITY CLASSIFICATION 

 OF THIS PAGE 



UNCLASSIFIED 



19. SECURITY CLASSIFICATION 

 OF ABSTRACT 



20. LIMITATION OF ABSTRACT 



NSM 7t ^n-ni-?80-5500 



* U. S. GOVERNMENT PRINTING OFFICE 1993 737-609 



Standard Form 298 (Rev. 2-89) 



Prescribed by ANSI Std. Z39- 1 8 

 298-102 



