PREFACE 



This report provides coastal engineers with a procedure for calculat- 

 ing a limiting depth to appreciable sand level changes seaward of a beach, 

 using an estimate of extreme waves occurring at the locality. The re- 

 ported results are from an ongoing study of the seaward limit of effective 

 sediment transport, carried out under the sediment-hydraulic interaction 

 program 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 Dr. Cyril J. Galvin, Jr., Chief, Coastal 

 Processes Branch. The author appreciates the comments and cooperation 

 of Dr. Galvin, C.B. Chesnutt, and Dr. J.R. Weggel, CERC, and J.T. Jarrett, 

 U.S. Army Engineer District, Wilmington. 



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. 



ycL 



<JOHN H. COUSINS 

 Colonel, Corps of Engineers 

 Commander and Director 



