32
JOO
200
150
100
50
0L-__ ~ ________ ~ __ ~ __ ~ __ ~~ __ ~ __ _
o
200
.00
Cr~ numbel' 1'1111'" step size 01 250m
J. Lou· T. Wolf· W. Rosenthal
Fig. 4 Location of the Oder
Estuary
Fig. 5 Suspended sediment
concentrations in mgll in
the Oder Estuary under
calm wave climate
initial uniform depth-averaged concentration of 40 mg/l was assumed for the
whole study area.
Figure 5 shows the sse model result under a calm wave climate without
currents, a uniform significant wave height of 0.2 m, and a peak wave period
of 3.0 sec. The result indicates that during this calm weather period the waveinduced bottom stresses did not excess the critical bottom stress and that the
sediment particles would settle down to the sea bed, resulting in clearer water.
It also shows that most of the settling is predicted to occur in the eastern part
of the Estuary (Polish side).
By contrast, with a wave height of 0.6 m and a wave period of 4.0 sec, the
model predicts resuspension into the water column to produce turbid water
(see Fig. 6). In the eastern part, the concentration is slightly higher than the
initial background value; substantially higher suspension was mainly found in
the western part (German side).