Sand volume changes for the seven storms are averaged by profile line in 

 Figure 32. In general, the north end of the beach eroded while the south end 

 accreted or remained stable during storms. The minimum sand loss occurred at 

 profile lines within the two groin systems and near Townsend Inlet. Maximum 

 losses occurred at Corson Inlet and the north and south indentations. The 

 losses at the south indentation appeared related to the Sea Isle City groin 

 field. 



Maximum volume loss above MSL between any two successive surveys, regard- 

 less of time interval, is shown in Table 7 for each profile line. Some maxi- 

 mums were due to single storms and others were probably due to several events 

 over a long period (up to 110 days) . The greatest number of maximum losses 

 occurred during fall and winter, when surveys were generally more frequent. 



Table 7. Maximum beach loss 



data from 



Ludlam 



Island. 



Profile 

 line 



Maximum 

 volume loss 



(ydVft) 



Survey dates 



No. of days 

 between surveys 



Before 



Afte 



r 



1 



19 



14 Oct. 1970 



10 Dec. 



1970 



57 



2 



20 



5 Dec. 1964 



18 Jan. 



1965 



44 



3 



17 



6 Nov. 1962 



9 Dec. 



1962 



33 



4 



20 



7 Jan. 1964 



15 Jan. 



1964 



8 



5 



16 



21 Jan. 1967 



4 May 



1967 



103 



6 



13 



26 Jan. 1966 



1 Apr. 



1966 



65 



7 



15 



26 Oct. 1968 



13 Nov. 



1968 



18 



8 



15 



26 Oct. 1968 



13 Nov. 



1968 



18 



9 



13 



9 Feb. 1969 



14 Mar. 



1969 



33 



10 



14 



26 Oct. 1968 



13 Nov. 



1968 



18 



11 



9 



15 Oct. 1970 



9 Dec. 



1970 



55 



12 



9 



26 Oct. 1968 



13 Nov. 



1968 



18 



13 



10 



26 Jan. 1966 



1 Apr. 



1966 



65 



14 



8 



26 Jan. 1966 



1 Apr. 



1966 



65 



15 



9 



10 Mar, 1964 



8 Apr. 



1964 



29 



16 



15 



29 Aug. 1963 



20 Sept. 



1963 



22 



17 



21 



13 Sept. 1967 



20 Sept. 



1967 



7 



18 



15 



7 Jan. 1964 



15 Jan. 



1964 



8 



19 



16 



23 Sept. 1964 



5 Dec. 



1964 



73 



20 



22 



8 Oct. 1967 



26 Jan. 



1968 



110 



b. Monthly Changes . Clear trends in the relative volume of sand above 

 MSL and in the position of the shoreline on Ludlam Beach are evident when 

 averaging data by survey month. Figure 33 illustrates the cumulative volume, 

 based on all surveys in a given month, averaged for all profile lines and plot- 

 ted relative to the yearly average on 1 January with the net yearly change 

 removed. A net accretion between months occurred between March and July. 

 During each of the remaining 7 months the monthly change was negative and the 

 result was a decrease in the cumulative sand volume on the beach. 



45 



