Reprint or republication of any of this material shall give 

 appropriate credit to the U.S. Army Coastal Engineering Research 

 Center. 



Limited free distribution within the United States of single copies 

 of this pubhcation has been made by this Center. Additional copies 

 are available from : 



National Technical Information Service 

 ATTN: Operations Division 

 5285 Port Royal Road 

 Springfield, Virginia 22151 



The findings in this report are not to be construed as an official 

 Department of the Army position unless so designated by other 

 authorized documents. 





