PREFACE 



This report provides a new technique for seaward-limit estimation, supple- 

 menting those given in Section 4.523 of the Shore Protection Manual (SPM) . 

 Two calculated water depths locate the edges of a buffer region called the shoal 

 zone, which is defined so that significant alongshore transport and intense on- 

 shore-offshore transport by waves occur landward of this zone, and only insig- 

 nificant onshore-offshore transport by waves occurs seaward of this zone. This 

 profile zonation and guidance on its applications are interim results from an 

 ongoing study conducted within the beach behavior and restoration research pro- 

 gram of the U.S. Army Coastal Engineering Research Center (CERC) . 



The report was written by Dr. Robert J. Hallermeier, Oceanographer, under 

 the general supervision of C. Mason, Chief, Coastal Processes Branch, and then 

 Dr. R.M. Sorensen, Chief, Coastal Processes and Structures Branch. 



Comments on this publication are invited. 



Approved for publication in accordance with Public Law 166, 79th Congress, 

 approved 31 July 1945, as supplemented by Public Law 172, 88th Congress, 

 approved 7 November 1963. 



iD E. BI'SHOP 

 Colonel, Corps of Engineers 

 Commander and Director 



