Figure 2. Tank for Large Waves at Dalecarlia Reservation 



172. Eighteen distinct cases have been documented (see Kraus and Larson 

 1988a) of which all but two were started from a plane slope of 1:15. Approxi- 

 mately 1,500 m'^ of sand were needed to grade the plane initial slope, which 

 was done with a small bulldozer. The wave parameters ranged from periods 

 between 3.75 and 16.0 sec and generated wave heights between 0.55 and 1.68 m 

 in the horizontal part of the tank. The wave height, wave period, and water 

 depth were held constant during a run, except in one case for which the water 

 level was varied to simulate a tide. The water depth ranged from 3.5-4.6 m in 

 the different cases, and two grain sizes were used with median diameters of 

 0.22 and 0.40 mm. The 0.22 -mm grain size was employed in the 1956-57 experi- 

 ments, and the 0.40 -mm grain size was used in the 1962 experiments. The 

 specific gravity of the sand grains was 2.65. Waves were run until a stable 

 beach profile had developed and no significant changes were detected, which 

 normally occurred after 40-60 hr. The term "case" will be used to describe a 



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