Table 3. Shoreline and unit volume changes at Cape Cod 
for 17 December 1970 storm. 
Profile MSL PRCHAR! Plus 12! 
line shoreline change unit volume unit volume 
(£t) (yd?/£t) (yd?/£t) 
01 : -21.7 6d 
02 -12.9 ga 
03 aS -17.1 od 
04 4 all 
0S 46 off 
06 on) .0 
07 ol a9 
08 32 27 
09 x5 5) 
10 8 .6 
Average de) .8 
ISee Figure 8 for definitions. 
Pipe profiles were located along profile lines 04 and 08. At profile 
line 04, pipes 1 to 6 were read on both 16 and 18 December 1970. Maximum 
erosion at any one of the pipes was 4 feet, measured at pipe 4 where the 
sand level changed from 3.4 to -0.6 feet MSL. There was no accretion at 
any of the pipes. 
At profile line 08, pipes 1 to 7 were read on both 16 and 18 December 
1970. Maximum erosion at any one of the pipes was 2.5 feet, measured at 
pipe 2 where the sand level changed from 9.9 to 7.4 feet MSL. Maximum 
accretion at any one of the pipes was 0.5 foot, measured at pipe 3 where 
the sand level changed from 5.5 to 6.0 feet MSL. 
2. Misquamicut Beach, Rhode Island. 
Poststorm surveys at Misquamicut were not completed until 23 and 24 
December, so the analysis of these data probably does not reflect maximum 
storm effects. A reconnaissance inspection of the profiles on 19 December 
indicated that the beach had already rebuilt significantly since the storm. 
Profile line locations are shown in Figure 11, prestorm and poststorm 
profiles in Figure 12, and MSL contour and area changes in Table 4. All 
profile lines showed a net loss from MSL to the 12-foot contour. Erosion 
was noted to be less severe on the east and west ends of the beach. This 
may be a result of protection afforded by Watch Hill Point on the west 
and Weekapaug Inlet to the east. Profile lines 01 and 02 are within 500 
(Zs) 
