Reprint or re-publication of any of this material 

 shall give appropriate credit to the authors , the Atomic 

 Energy Commission, and the Coastal Engineering Research 

 Center. 



Limited free distribution of this publication within 

 the United States is made by the U. S. Army Coastal En- 

 gineering Research Center, 5201 Little Falls Road, N.W. , 

 Washington, D. C. 



The contents of this report are not to be used for 

 advertising, publication, or promotional purposes. 

 Citation of trade names does not constitute an official 

 endorsement or approval of the use of such commercial 

 products . 



The findings in this report are not be be construed 

 as an official Department of the Army position unless 

 so designated by other authorized documents. 



f WHO IN. 



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