310
Fig. 5:
Monitoring of progress and impact of channel dredging,
Playgreen Lake area, Manitoba. A selection of 5 taken
from a total of 18 relatively cloud free passes of ERTS
is made displaying bands 7 (B, C, D, E), and 5 (A, E, G,
H). Image B (16-5-73) shows the advance of the dredge
to that date; progress can be followed on C (20-9-73)
and D (14-7-74). The increase in impact of dredge spoil
is shown on F, G, H (dates respectively the same as B,
C, D). E shows the area in spring (23-4-74), note small
amount of inundation. Note the change in turbidity
patterns (light tones) between G and H.