PREFACE 



This report provides coastal engineers with documentation necessary to 

 compute the longshore energy flux used in sand transport rate calculation when 

 random waves are present and synchronous data from two closely spaced pressure 

 transducers exist. The documentation is based on a 3-year data collection 

 effort and study of sand transport rates at Channel Islands Harbor, California. 

 The computer program documented herein was used in wave data analysis for a two 

 pressure sensor array installed in 30 feet of water at the site. The work, was 

 carried out under the U.S. Army Coastal Engineering Research Center's (CERC) 

 Littoral Data Collection work unit, Shore Protection and Restoration Program, 

 Coastal Engineering Area of Civil Works Research and Development. 



This report was prepared by Dr. Todd L. Walton, Jr., Hydraulic Engineer, 

 CERC, and Dr. Robert G. Dean, Department of Civil Engineering and College of 

 Marine Studies, University of Delaware. Dr. Walton worked on the project under 

 the general supervision of Dr. J.R. Weggel, Chief, Evaluation Branch, and 

 Mr. N. Parker, Chief, Engineering Development Division. 



Technical Director of CERC was Dr. Robert W. Whalin, P.E., upon publication 

 of this report. 



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. 



TED E. BISHOP 



Colonel, Corps of Engineers 



Commander and Director 



