Geology Reference
In-Depth Information
Fig. 9.21
Multi-decadal coastal development of the Nanhui Mudbank in the Changjiang Delta (After Huo et al.
2010
). Color bars
denoting the magnitude of accretion (positive) and erosion (negative)
more NE to more ENE from 1959 onward. The stron-
ger winds and the change in direction toward a smaller
angle with the coastline resulted in an enhanced
alongshore transport and a reduction of the onshore
wave energy component. This led to net deposition in
the Surinam coast (Eisma et al.
1991
). Enhanced
alongshore transport also favored development of
longer mudbanks (Fig.
9.23
, Augustinus
2004
).
Multi-decadal changes in the Guiana coastal develop-
ment were therefore presumed to be determined by
the variations in the strength and the direction of the
trade winds instead of the flux of sediment supply
from the Amazon (Eisma et al.
1991
). Note that the
coast of Guiana and French Guiana has an SE-NW
orientation, different from the nearly east-west orien-
tation of the Surinam coast. The difference in angle
