APPENDIX H: DATA SUMMARY FOR THE STORM OF 17 DECEMBER 1970 



1. The 17 December 1970 storm was monitored at all seven localities 

 and was previously discussed by DeWall, Pritchett, and Galvin (1977). The 

 low pressure system is documented on the synoptic weather map. The present 

 report includes further analysis of the data and new wave data, and uses a 

 better edited version of the original survey data. Wave heights ranged from 

 2.8 m at Ludlam Beach to 4.2 m at Misquamicut and were generally higher at 

 the northern localities. Tide data were unavailable from Atlantic City, but 

 peak tides at Sandy Hook and Nauset Beach (adjusted from Boston, 

 Massachusetts) ranged from 1.6 to 1.3 m above msl. Poststorm surveys were 

 conducted shortly after the storm, but there is evidence of apparent recovery 

 at Jones Beach and Long Beach Island. Wave time-histories show a minor storm 

 prior to the major event at the four northern localities, whereas the New 

 Jersey sites experienced only the single storm. 



2. Shoreline and slope changes were significant, but highly variable 

 between profile lines and between localities. All localities eroded with 

 median changes ranging from -5.2 m^/m at Ludlam Beach to -20.6 m^/m at Nauset 

 Beach. In general, the northern sites appear to have lost more sediment 

 higher on the beach (from the 1- to 2 . 5-m contour), whereas the three New 

 Jersey sites lost sediment lower on the profile (between the 0- and 2.0-m 

 contours). Nauset Beach, the most erosive site, experienced the greatest 

 variation along the beach with a hinge range of 27.2 m^/m. Ludlam Beach, the 

 most stable, was also the least variable with a hinge range of only 6.2 m^/m. 



3. Tables and figures are arranged according to predicted and actual 

 water levels, hindcasted wave data, profile comparisons, shoreline and slope 

 changes, unit volume changes, and distribution of unit volume changes. 



HI 



