with time. Figure 31 shows the time change of the average shoreward berm face 

 slope 4>-^ and seaward slope 4>z changed during two typical cases (Cases 300 

 and 1-3) with berm buildup. The seaward berm slope was approximately indepen- 

 dent of grain size and ranged between 6-8 deg. 





U) 6 



CD 



o. 



O 



CO 



CO 



Elapsed Time (hr) 



Figure 31. Growth of representative berm slopes with elapsed time 



293. If a well -developed shoreward berm face slope was present, it was 

 considerably more gentle than the seaward face slope. Typical values of the 

 average shoreward berm face slope were 2-4 deg, although steeper slopes 

 occurred. The average shoreward berm face slope also appeared to be indepen- 

 dent of grain size and constant in time, except for one case (Case 201) which 

 showed an increase with time toward an equilibrium value of about 15 deg. In 

 this case the grain size was coarse, and the wave height and wave steepness 

 were relatively small . The waves were probably breaking very close to the 

 shoreline, one of the few cases where no breakpoint bar appeared along the 

 profile, strongly affecting the shape of the berm. 



113 



