PREFACE 



The study described herein was authorized by the US Army Engineer Dis- 

 trict, Wilmington. All elements of the investigation were conducted at the US 

 Army Engineer Waterways Experiment Station (WES) from July 1980 to September 

 1984. Personnel working on the study were in the Wave Dynamics Division 

 (WDD), Hydraulics Laboratory (HL) , under the direction of Mr. Henry B. 

 Simmons, Chief, HL, Dr. Robert W. Whalin, former Chief, WDD, and Mr. C. Eugene 

 Chatham, Jr., acting Chief, WDD, during July 1980 to June 1983. Effective 

 July 1, 1983, WDD and its personnel were combined with and transferred to the 

 Coastal Engineering Research Center (CERC) of WES which was under the super- 

 vision of Dr. Whalin, former Chief, CERC. Currently CERC is under the direc- 

 tion of Mr. Charles C. Calhoun, Jr., Acting Chief. Dr. James R. Houston, 

 Chief, Research Division, was Project Manager for the study from 1980 to 1983, 

 and Dr. S. Rao Vemulakonda was Project Manager from 1983 to 1984. 



The study was performed by Drs. Houston, S. Rao Vemulakonda, Abhimanyu 

 Swain, Mrs. Lucia W. Chou, and Messrs. Paul D. Farrar and Bruce A. Ebersole. 

 Numerical computations associated with this work were performed on the CRAY 1 

 computers of the Air Force Weapons Laboratory, Kirtland AFB, New Mexico, and 

 Boeing Computer Services. This report was edited by Mrs. Shirley A. J. 

 Hanshaw, Publications and Graphic Arts Division, WES. 



COL Tilford C. Creel, CE, and COL Robert C. Lee, CE, were Commanders and 

 Directors of WES during the preparation of this report. COL Allen F. Grum, 

 USA, was Director of WES during the publication of this report. Mr. Fred R. 

 Brown and Dr. Whalin were Technical Directors. 



