Figure 30. 



View southward showing beach and foredune morphology in reach E. 

 Photo taken near station 6 (17 October 1976). 



The bluff recession and shoreline change rates for each period are shown 

 in Figure 31. One obvious feature is the regularity in bluff recession rate 

 along the reach, particularly in the first and last period. The only area of 

 high bluff recession was between stations 17 and 26. The recession rate be- 

 tween 15 April and 18 November 1971 was 2.5 meters per year, with a slight in- 

 crease to 2.8 meters per year during the second period with high localized 

 erosion to both the shoreline and bluff line between stations 18 and 23. 



In reach E (like the other four reaches) the bluff recession rate increased 

 significantly during 15 November 1972 to 20 November 1973 but the longshore 

 pattern was similar to the preceding period. The bluff retreated 6.3 meters, 

 an amount greater than the 5.1 meters of recession measured for reach A during 

 the same period. The shoreline accreted 4.7 meters during the period, possibly 

 by the buildup of eroded bluff material on the beach. The rate of bluff re- 

 cession decreased during the final period to 2 meters per year and was uniform 

 along the reach. 



Shoreline changes generally correlated well with the bluff recession during 

 all but the third period. Bluff and shoreline change rates for the full period 

 are shown in Figure 32. Interestingly, the shoreline and bluff-line peaks appear 

 out of phase by six stations. 



Beach widths during the study varied from to 25 meters and averaged 10.5 

 meters. The peak beach widths occurred on the beach pads. The widest beaches 

 occurred 20 November 1973 and averaged 17.0 meters in width. Reach E data are 

 summarized in Table 9. 



45 



