reach. During the same period, the bluff recession was also a fairly constant 

 2.0 meters per year. A simple regression analysis of the average beach width 

 and the recession rate at each station during each period resulted in correla- 

 tion coefficients of 0.6 or higher except for the last period which had a cor- 

 relation coefficient of 0.26. This is an indication of the importance of beach 

 width on bluff or, in this case, dune movement. Average rates of bluff reces- 

 sion and shoreline change for the full 4 years are shown in Figure 24. Reach 

 C data are summarized in Table 7. 



20 



-2^-20 



-40 



I I I I I ' I 



I I I I I I I I I I I I I I I I I 



Bluff Recession 



Shoreline Chonges 



'''!'■■''''' 



- 4 

 2 





 --2 - 

 --4 ^ 

 6 



-8 



-10 



10 



20 



30 

 Station 



40 



50 



60 



Figure 24. Rates of bluff recession and shoreline change alon| 

 reach C from 15 April 1971 to 23 November 1974. 



Table 



7. Summary of bluff 



shore, and beach data 



for re 



ach 



C (5 



1 stations) . 



Dat 



e 





lUuff 



recession 



Shorel 



ine change | 



Beach width' | 



Period 

 length 





Rate 







Max. 





Kate 







Max. 









Change 







Cm) 



(m/yr) 



(m/yr) 



(m/yr) 



(m) 



(m/yr) 



(m/yr) 



(m/yr) 



(m) 



(m) 



(ra) 



(mo) 



15 Apr. 



1971 



















13.3 



9.2 











1.5 



2.2 



.1.9 



12.3 



-2.1 



-3.1 



13.0 



31.4 









8 



22 Dec. 



1971 



















5.9 



6.6 



-7.4 









3.3 



3.6 



4.0 



15.0 



-7.3 



-8.0 



6.9 



-26.3 









11 



16 Nov. 



1972 



















5.6 



4.1 



-0.3 









1.6 



1.7 



6.7 



11.6 



-5.7 



-6.3 



3.6 



-13.0 









11 



18 Oct. 



1973 



















4.5 



2.5 



-1.1 









2.2 



2.0 



i.4 



7.0 



2.0 



1.? 



3.7 



9.5 









13 



23 Nov. 



1974 



















6.6 



2.3 



2.1 





15 Apr. 



1971 























to 





8.5 



2.4 



3.5 



7.2 



-13.1 



-3.7 



1.7 



-6.6 





43 



23 Nov. 



1974 























^Beach width adjusted to lace level (176.79 meters IGLD) . 



5. Reach D . 



Reach D is located 3.0 kilometers south of the powerplant, inside the 

 area affected by the beach nourishment project. The reach, which includes 



39 



