Figures 41 and 42 have been rearranged to emphasize the seasonal 

 change in shoreline and ijnit voliime. Zero is not the value of the MSL 

 position or unit volume on thje first survey; instead, zero is the average 

 value of all the monthly averages shown in Figures 39 and 40. The indi- 

 vidual data points in Figures 41 and 42 are the average value for that 

 month, for all the years when data were collected in that month. For 

 example, the first point in Figure 41 indicates that the average MSL 

 position in January for the five recorded January's was approximately 

 7.5 feet (2.2 meters) landward of the average MSL position. The same 

 format used in Figures 41 and 42 is also used for comparable data from 

 Boca Raton and Hollywood. 



Figures 41 and 42 show a minimum of sand on the beach in April and a 

 maximum on the beach in August. The net rate of change, averaged from 



25 I- 



Z '^ 10- 



-15 - 



Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. 

 Figure 41. Seasonal change in MSL position at Jupiter. 



67 



