breaker was 1.1m, and it was located 15-20 ra from the position of the initial 

 still-water shoreline (Table A3). Similarly, in Case 501, the breaking wave 

 height was measured 17 times at a secondary breaking position. The average 

 secondary breaking wave height was 0.8 m, and the breaker was located 5-8 m 

 from the initial still-water shoreline (Table A12). 



Variations and Exceptions 



35. Information on case variations and exceptions is collected in this 

 section. The initial profile (0 hr) for Case 510 was essentially the same as 

 the final profile (100 hr) from Case 500. In going from Case 500 to Case 510, 

 wave height and period were changed from 1.52 m and 3.75 sec to 0.61 ra and 

 16.0 sec, with the water depth held the same in order to determine if the 

 after-storm recovery process observed in the field would occur. The eroded 

 profile produced by steep waves in Case 500 underwent partial recovery under 

 the low steepness waves of Case 510. 



36. The initial profile (0 hr) for Case 610 was essentially the same as 

 the final profile (60 hr) for Case 600. In going from Case 600 to Case 610, 

 wave height was increased from 0.61 m to 1.83 m, while holding the wave period 

 and water level fixed, to determine if the accretionary profile would erode 

 under higher waves. This increase in wave height tripled the value of the 

 wave steepness and produced erosion of the near-equilibrium profile estab- 

 lished in Case 600. 



37. Wave height and period were the same for Cases 901 and 911, but the 

 water level in Case 911 was cyclically varied in a stepwise fashion with an 

 approximate 12-hr period to simulate a tide (Table A19). The objective of 

 this case was to determine if the varying water level would smooth the profile 

 as compared to a fixed level. This effect was observed. Water level ranged 

 between 3.5 and 4.4 m to give the mean still-water level of 3-96 m used in 

 Case 901. 



38. The same wave conditions were used in Cases 110 and 100 to verify 

 reproducibility of the generated profile change; good agreement was found. In 

 both cases, the profile eroded to the end of the tank and reflection 

 increased. 



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