different inside the jetties and the forcing functions (tides, waves, and 

 wave-induced currents) are the same for both cases. In both cases, there is 

 deposition outside the jetty tips (sta 251+00). It changes to erosion inte- 

 rior to the jetty tips because of circulation due to wave-induced currents. 

 The heaviest deposition rates are observed near the jetty tips. This is the 

 area where the channel cuts through the offshore bar and material from the bar 

 tends to move into the channel and deposit there. 



CM 



CO 



00 in CD r^ lo •«- 

 CO r^ r^ LO CD CM 



o 



1 





O 



1 



T 



CM 



1 



CM 



■^ 



"^ 



o 



1 



CD 



in 



L 1_ 



2 



3 



4 



5 



6 



7 



8 



9 



10 1 



1 1 



1 1 1 1 1 1 1 1 



-100 -50 



50 100 150 200 

 DISTANCE, 100 ft 



250 300 350 400 



Figure 24. Erosion/deposition rates (ft/year) for base condition 

 from Model B (+ = erosion, - = deposition) 



66 



