per year for the entire island. As shown previously (Fig. 67), a direct 

 relationship exists between net yearly loss and the seasonal range of volume 

 change, i.e., as range increases, loss increases. When the ratio of net yearly 

 change to seasonal range, C, is plotted, as in Figure 71, a number of inter- 

 esting conditions appear. The minimum C value on Ludlam Beach, C = -0.15, 

 occurred in the three locations where the most critical erosion existed; i.e., 

 at Corson Inlet and in the coastal indentations north and south of the groins. 

 Additionally, the C values progressively increased to positive values from 

 north to south in the region north of the Sea Isle City groins at a rate of 

 +0.000044 per foot, and north of Townsend Inlet at +0.00002 per foot. 



Profile Line 



Groins 



Sea Isle <. 

 City 



Miles 



Groins 



-.15 -.10 -.05 .05 .10 .15 .20 .25 



c= 



Net Yeorly Chonge (ydVft) 



Onshore-Offshore Seasonal Range 

 (ydVft) 



Figure 71. Relationship between net yearly sand volume change and seasonal 



range of sand volume above MSL. The ratio, C, is a dimensionless 

 number. Note the minimum value of -0.15 in the coastal indentations. 



91 



