STUDY OF BEACHFILL LONGEVITY: LONG BEACH ISLAND, NJ.

A time series physical process study consisting of several months of LEO data as well as repetitive beach profiling of both nourished and unnourished beaches (to both the north and south of the fill site) was initiated. The purpose was to evaluate the longevity of the dredge spoil as fill and monitor its dispersal. The study began 5 months prior to emplacement, continued during the 4 months of emplacement, continued monitoring the fill every 2 weeks for 3 years, and continued collecting data annually for years 4 to 7. Repetitive profiles indicate that both the nourished and unnourished beaches show comparable erosion-accretion response to low intensity storms. However, during Hurricane David (Sept. 6, 1979) 40% of the emplaced sediment was eroded from the filled beach compared to 25% along the unaltered beach.