Birkemeier (1979a) reported the average monthly variation in mean shore- 

 line position and unit volume for the same above MSL profiles (see Figs. 33 

 and 34). These data show no clear-cut seasonal variation. The subaerial 

 beach has the least amount of sand during March and December and the greatest 

 amount during April and November. These data do not provide the below MSL 

 profile changes. 



4 r 



Jon. Feb. Mar. Apr. Moy June July Aug. Sept. Oct. Nov. Dec. 



Figure 33. Monthly variations in mean profile volume 

 (profile lines 1 to 6, 18 to 23, from May 

 1974 to January 1977). 



3 r 



Jon. Feb. Mar. Apr. Moy June July Aug. Sept. Oct. Nov. Dec. 



Figure 34. Monthly variations in mean shoreline posi- 

 tion (profile lines 1 to 6, 18 to 23 from 

 May 1974 to January 1977). 



Changes in unit volume and MSL shoreline position from May 1974 to January 

 1977 for each of 15 profile lines are shown in Figures 35 and 36. These fig- 

 ures include Birkemeier 's data and additional data from more closely spaced 

 profile lines on the FRF property (lines 7, 8, 16, and 17). Profile lines 16 

 and 17 are located 48 meters (160 feet) north and south, respectively, of the 

 FRF pier. Unit volume changes are referenced to the average volume above MSL. 



60 



