75 TGQ 2/13/73 
Va 137° 
CHANGE IN ELEVATION IN METRES 
300 JAN. 3 1973 FEB.13 1973 MIN = —1.7 MAX = 1,2 
800 - 22 
__ 700 23 
f= 
24 
1 600 
= 
Y 25 
2 500 
2 
< y 
400 s 
Sy 
300 = 
Oo 
e 
al 
200 
100 
Figure 27. Contoured beach topography for surveys taken 2 January 
and 13 February 1973 and the contoured difference 
between surveys. The contour between the groin and 
the profile line was estimated. 
0)MSL SHORELINE 
b) ABOVE MSL SAND VOLUME 
sd sd sd 
10- - 
al |-—- - 
a : | : 
am = rz 
fe) 
2 : 
I \ | sel \ \ 
22 23 24 25 26 27.5 28 29 30 
GROIN 
Figure 28. Net change in MSL shoreline (m) and unit volume (m3/m) from 
29 August 1972 to 11 June 1973 for each profile line with 
mean change in each groin cell removed. Standard deviation 
(sd) of each mean is shown at the right of each cell, 
54 
