instrumentation lends credibility to the data set obtained with the LWT. In 

 this report data obtained with the LWT will be identified by the notation 

 "CE," signifying the US Array Corps of Engineers. 



48. Figure 6 displays the response of the beach profile type classified 

 as bar or berra in the various cases as a function of the deepwater wave steep- 

 ness H /L Q and a dimensionless sand fall velocity parameter H Q /wT in which 

 H = deepwater wave height, ra 

 L Q = deepwater wavelength, m 

 w = sand fall velocity, m/sec 

 T = wave period, sec 

 Beach profile types were visually classified as either bar or berm according 

 to the dominant tendency appearing in the plots (Appendix B). For example, if 

 a small breakpoint bar was present on a profile which showed a strong berm 

 buildup (onshore sand transport) during most of the run, the profile type was 



1 n" 1 













Bar 



3erm 







/ 











■ ■ 





10 - 



= Cb 

 CRIEPI ■ 



^ = 0.00070 (■ 









/ 

















o 





/ 























/ 







• 







• 







o 





/■ 



















-In 3 





/ 







■ 













Ty \° 



D 

 J 



/ 











■ 









vr 



/ 



■ 



• 



1 







« 



i 





















/ 



















m" 2 - 















D / 



1 

































































B D 





\ 

































































u u o / 





• 



























































































c 









O f • 



o / 























in" 3 - 







o 







/ 























5x10 



10 



10" 



H /wT 



Figure 6. Criterion for distinguishing bar and berm profiles by use 

 of the deepwater wave steepness and dimensionless fall velocity 



26 



