of the Sea Isle City groin field and within the groin field, where the yearly 

 maximum sand volume is generally during December. The range between the summer 

 maximum and the winter minimum, which usually precedes it by 6 months, is illus- 

 trated in Figure 36. The average difference between the minimum sand volume 

 (February) and the maximum sand volume (August) was 18 cubic yards per foot. 

 For the same survey period at Atlantic City, which included two artificial 

 beach fills. Everts, DeWall, and Czerniak (1974) calculated a seasonal sand 

 volume range of 24.5 cubic yards per foot, somewhat larger than that observed 

 at Ludlam Beach. Shepard (1950) also observed similar seasonal changes in 

 beach profiles along the coast of southern California. 



W 



Profile Line 



St rothmere 



Sea Isle'^ 

 City 



Miles 



Groins 



10 20 30 40 



Mean Range of Volume Change (ydVft) 



Figure 36. Sand volume change from yearly minimum to yearly maximum 

 at Ludlam Beach. 



50 



