PREFACE 



Ten experiments were conducted at the Coastal Engineering Research 

 Center CCERC) from 1970 to 1972 as part o£ an investigation of the Labora- 

 tory Effects in Beach Studies (LEBS), to relate wave height variability 

 to wave reflection from a movable-bed profile in a wave tank. The inves- 

 tigation also identified the effects of other laboratory constraints. 



This report (Vol. I), the first of a series of eight volumes, documents 

 the procedures used in the 10 movable-bed laboratory experiments. It also 

 serves as a guide for conducting realistic coastal engineering laboratory 

 studies. Volumes II to VII are data reports for each experiment; Volume 

 VIII is a final analysis report. The work was carried out under the CERC 

 coastal processes program. 



This report was prepared by Robert P. Stafford, senior technician in 

 charge of the experiments for the duration of the experimental program, 

 and Charles B. Chesnutt, principal investigator from the beginning of the 

 1971 experiments through the completion of the program. Cyril J. Galvin, 

 Jr., Chief, Coastal Processes Branch, was the principal investigator from 

 the beginning of the experimental program through the planning of the 1971 

 experiments and provided general supervision thereafter. 



Comments on this publication are invited. 



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

 Congress, approved 21 July 1945, as supplemented by Public Law 172, 88th 

 Congress, approved 7 November 1963. 



7/CL. 



JOHN H. COUSINS 



Colonel, Corps of Engineers 



Commander and Director 



