0.0 
0.0 
U.0 
(= 
we 
z 
°o 
” 
” 
uw 
[s) 
ws 
(3 
= 
2 
= 
bad 
<x 
= 
20.0 
UTNE TTT 
10.0 
0.0 
TTT 
RECURRENCE INTERVAL (YEARS) 
CASE C: PROFILE NO. 140 HURRICANES AND NORTHEASTERS 
Figure 36. Maximum recession-recurrence design curve for combined 
hurricanes and northeasters for Profile 140 
Figures 37 and 38. Recessions of 50 ft are indicated on the combined curve 
for recurrence intervals of 500 years (Figure 39). 
170. Analysis of typical profiles for the Sea Bright to Ocean Township 
area shows that storms with recurrence intervals on the order of 500 years 
can result in maximum recessions on the order of 30 to 50 ft. For seawall- 
backed beaches (Profiles 160 and 82) recession of the berm crest extends to 
the seawall, possibly resulting in substantial undermining of the structure. 
For unprotected beaches with low dunes, such as those typified by Profile 186, 
this amount of recession could result in breaching of the dune at several 
locations alongshore, since many dunes are less than 50 ft wide at the crest. 
Results of this investigation indicate that protective measures are necessary 
for the beach complex in the project reach; three of the four profiles exam- 
ined indicate either the possibility of breaching or undermining of the sea- 
wall as a result of a single major storm event. This situation would be 
severely compounded if several storms were to occur in one year or between 
beach renourishments. The recommended fill designs are therefore evaluated as 
a means of providing a desirable level of protection. 
90 
