for a given grain size were characterized by waves of varying steepnesses, 

 producing either accretionary or erosional profiles. 



4. Only three sources of published information exist on the experiments 

 from approximately the time period in which they were performed. In a land- 

 mark paper on scale effects in movable-bed models, Saville (1957) presents 

 results of four cases pertaining to the 0.22-mm sand and similar experiments 

 performed in two smaller tanks. Caldwell (1959) gives a short discussion and 

 a table summarizing incident wave characteristics and shoreline change in 

 selected runs of eight cases involving the 0.22-mm sand. Saville and Watts 

 (1969) present some drawings of profiles and comparison of results for 

 selected cases with the 0.22- and 0.40-mm sands. To date no report containing 

 a full compilation of the data has been published on the experiment series 

 with the 0.22-mm sand, and no detailed information has been publicly available 

 on the second series of experiments performed using the 0.40-mm sand. 



5. In recent years, tanks comparable in size to the LWT have been built 

 in several countries. The capabilities afforded by modern instrumentation 

 allow more efficient and accurate measurement of profile change, sediment 

 transport, waves, and fluid flow than were possible during the experiments in 

 the LWT. The cost of performing large movable-bed experiments is extremely 

 high, however, and only a few such data collection programs have been reported 

 (Kajima et al. 1983, Vellinga 1986, Dette and Uliczka 1987). 



6. A wealth of data was collected in the pioneering experiments on 

 beach profile change employing the LWT, and it is doubtful that experiments 

 using the same wave and beach conditions will be performed again in any 

 facility. The data thus constitute a valuable resource that should be 

 preserved. Although three decades have passed since the experiments were 

 performed, most of the original data is extant. 



Scope 



7. The purpose of this report is to fully document the experiments 

 performed and the data obtained on beach profile change using the LWT. Mea- 

 sured beach profiles and wave characteristics are given for all major cases 

 recorded in the original logbooks and other primary data sources. An effort 

 was made to assemble background information on the characteristics of the tank 

 and experiment conditions and procedures. This information is included to 



