CE Case 300 





hr 



D 



0-1 



O 



1-3 



A 



3-5 



+ 



5-10 



X 



10-15 







15-20 



V 



20-30 



■ 



30-40 



* 



40-50 



20 40 60 80 



Distance from Initial Shoreline (m) 



Figure 33. Calculated distributions of the net cross -shore 

 sand transport rate for an erosional case (Case 300) 



shape. Initially, the transport rate distribution showed a clear negative 

 peak, but the shape of the distribution became smoother as the breakpoint bar 

 approached equilibrium volume. Material was thus transported shoreward over 

 the bar and deposited on the foreshore. The breakpoint bar was formed mainly 

 by onshore transport and is seen as the minimum occurring in the first 

 transport rate distribution. Similar to Case 300, the seaward part of the 

 transport rate distribution may be well approximated with an exponential 

 function decaying with distance in the offshore direction. 



Classification of Transport Rate Distributions 



312. Depending on wave conditions and sand size, the distribution of 

 the cross-shore transport rate took a specific shape. Since the transport 

 rate in this study is determined from consecutive profile surveys, calculated 

 distributions represent an average net response of the profile and not the 

 instantaneous transport rate. If the initial and final profiles from a 



122 



