ITnrlassified 



SECURITY CLASSIFICATION OP THIS PAGE 



REPORT DOCUMENTATION PAGE 



Form Approved 

 0MB No 0704 0188 

 f«p Date lur}30. 1986 



la REPORT SECURITY CLASSIFICATION 



Unclassified 



lb RESTRICTIVE MARKINGS 



2a SECURITY CLASSIFICATION AUTHORITY 



2b DECLASSIFICATION /DOWNGRADING SCHEDULE 



3 DISTRIBUTION/AVAILABILITY OF REPORT 



Approved for public release; distribution 

 unlimited. 



a PERFORMING ORGANIZATION REPORT NUMBER(5) 



Technical Report CERC-88-1 



5 MONITORING ORGANIZATION REPORT NUMBER(S) 



6a NAME OF PERFORMING ORGANIZATION 

 USAEWES, Coastal Engineering 

 Research Center 



6b OFFICE SYMBOL 

 (If applicable) 



7a. NAME OF MONITORING ORGANIZATION 



6c. ADDRESS (Oty, State, and ZIP Code) 



PO Box 631 



Vlcksburg, MS 39181-0631 



7b ADDRESS (Gty, State, arKi ZIP Code) 



8a. NAME OF FUNDING /SPONSORING 

 ORGANIZATION US Army 



Engineer District, Norfolk 



8b OFFICE SYMBOL 

 (If applicable) 



9. PROCUREMENT INSTRUMENT IDENTIFICATION NUMBER 



Intra-Army Order No. AD-86-3018 



8c. ADDRESS (City, State, and ZIP Code) 

 Norfolk, VA 23510-1096 



10 SOURCE OF FUNDING NUMBERS 



11 TITLE (Include Security Classification) 

 Coastal Engineering Studies in Support of Virginia Beach, Virginia, Beach Erosion Control 

 and Hurricane Protection Project; Report 2: Seawall Overtopping Evaluation ^ 



12 PERSONAL AUTHOR{S) 

 Lillycrop, W. Jeff; Pope, Joan; Abel, Charles E. 



13a TYPE OF REPORT 

 Report 2 of a series 



13b TIME COVERED 

 FROM 



14 DATE OF REPORT (Year, Month, Day) 

 September 1988 



15 PAGE COUNT 



56 



16. SUPPLEMENTARY NOTATION r j i j 



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

 VA 22161. 



COSATI CODES 



18 SUBJECT TERMS (Continue on reverse if necessary and identify by block number) 

 Irregular waves Virginia Beach 

 Seawalls Wave overtopping 

 Storm surge 



19 ABSTRACT (Continue on reverse if necessary and identify by block number) 



A study was conducted to determine overtopping rates for a step-faced seawall with 

 curved parapet. The seawall was designed as part of a beach erosion control and hurricane 

 protection project along approximately 6 miles of Virginia Beach, Virginia. Storm damages 

 to the area have included loss of beach, destruction of bulkhead and seawall systems, dam- 

 age to buildings, and inshore flooding along the commercially developed and urban 

 shoreline. 



Using the Storm Time-History Method developed for this study to calculate overtopping 

 rates from results of physical model tests, results show that the design will reduce over- 

 topping to a suitable level. The seawall design consists of a seawall with crest elevation 

 of +15.7 ft NGVD fronted by a beach with elevation +3.4 ft NGVD which was tested using 

 storm surge hydrographs from an August 1933 hurricane and a March 1962 extratropical storm. 



20 DISTRIBUTION /AVAILABILITY OF ABSTRACT 

 S UNCLASSIFIED/UNLIMITED D SAME AS RPT 



n DTIC USERS 



22a NAME OF RESPONSIBLE INDIVIDUAL 



21 ABSTRACT SECURITY CLASSIFICATION 



Unclassified 



22b TELEPHONE (/nc/ude Area Code) 22c OFFICE SYMBOL 



DD FORM 1473, 84 mar 



83 APR edition may be used until exhausted 

 All other editions are obsolete 



SECURITY CLASSIFICATION OF THIS PAGE 



Unclassified 



MBL/WHOI 



Q 0301 OOTlEbT 7 



