Profile line 18, on the west end of Jones Beach, is located approxi- 
mately 1 mile east (updrift) of the Jones Inlet jetty where the beach has 
been accreting since placement of the jetty. The profile line showed a 
slight net erosion from the storm, although accretion occurred between the 
4-foot and MSL contours and from the 8- to 7-foot contours. 
The average net unit volume change above MSL on the 15 Jones Beach 
profiles was -7.4 cubic yards per foot. 
Pipe profiles were located along profile lines 07 and 11. At profile 
line 07, pipes 1 to 5 were read on both 12 and 18 December 1970. Maximum 
erosion at any one of the pipes was 3 feet, measured at pipe 3 where the 
sand level changed from 8.5 to 5.5 feet MSL. Maximum accretion at any 
one of the pipes was 1.5 feet, measured at pipe 4 where the sand level 
changed from 1.5 to 3.0 feet MSL. 
At profile line 11, pipes 1, 2, and 3 were read on both 12 and 18 
December 1970. Maximum erosion at any one of the pipes was 1 foot, meas- 
ured at pipe 2 where the sand. level changed from 6.5 to 5.5 feet. There 
was no accretion at any of the three pipes. 
The effects of the December 1970 storm on Jones Beach resemble the 
effects of the storm on 4 February 1972 reported by Everts (1973), although 
Everts' report deletes data on profiles 2, 3, 16, 17, and 18. Both storms 
were the first severe storms of the winter storm season. The elevation of 
maximum erosion- (4 to 9 feet) and the accretion or less severe erosion 
below 3 feet were approximately the same (see Fig. 5 in Everts, 1973). 
Profile line 08 in this study showed accretion in both storms. The average 
erosion in the 4 February 1972 storm was 9.9 cubic yards per foot (U.S. 
Army, Corps of Engineers, Coastal Engineering Research Center, 1975, 
p. 4-73 in Vol. 1), which is comparable to the loss of 7.4 cubic yards per 
foot in December 1970. In both storms, MSL retreated at almost every 
profile and greater eroSion occurred on the west than on the east half 
of the beach. 
6. Long Beach Island, New Jersey. 
There are approximately 100 groins of varying effectiveness and two 
major jetties protecting the 18 miles of beach between Barnegat and Beach 
Haven Inlets. Sixteen of the 21 surveyed profile lines are within 400 
feet of the least one of these structures. Profile line locations are 
plotted in Figure 17, storm changes in Figure 18, and MSL contour and 
area changes in Table 7. Most of the profiles showed net erosion. The 
exceptions were profile lines 03, 04, 07, 10, and 19. The prestorm survey 
at profile line 12 was judged unreliable so changes were not computed. 
Erosion generally increased from north to south, with maximum erosion 
occurring at profile line 18. Maximum erosion was observed between the 
8- and 5-foot contours on 16 of the profile lines. Profile) lane 03 had 
48 
