Berm Evolution 



Volume 



58. Six cases showed considerable berm buildup, fewer than the eight 

 cases in which breakpoint bars formed (although Case 801 was classified as 

 accretionary, little net change occurred; therefore this case was not included 

 in Figure 12). The same types of calculations performed for breakpoint bars 

 were conducted to determine berm properties. Figure 12 illustrates growth of 

 berm volume with time for the six cases. Cases 200 and 600, exhibiting rela- 

 tively small berm buildup, rapidly reached equilibrium berm volume. Berm 

 volume was defined with respect to the initial profile in a manner analogous 

 to breakpoint bar volume. 



Elapsed Time (hr) 



Figure 12. Growth of berm volume through time 



Height 



59- The time evolution of maximum berm height Z. above the initial 

 profile is displayed in Figure 13. Case 701 initially showed a decrease in 

 maximum berm height, with a minimum occurring at the elapsed time of 5 hr. 

 In this case a large berm rapidly formed and exhibited steep shoreward and 



32 



