5.10 Wind Wave Generation in a Current
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The results of numerical calculations are given in Fig. 5.39. The fetch X is
plotted along the horizontal axis. The ratios h/ho, >..;>..o, 71/70 , and 72 /70 for
different values of the current velocities .:Y are plotted along the vertical axis.
As can be seen (see Fig. 5.39a) there is a significant influence of the current
on the wave elements. The wave height is increased by a current opposite to
the wind, while it is decreased by a fair current. The influence of the current
is of great importance in the initial stages of wave development. The influence
a)
2
:1 • s ' to"
Fig. 5.39. Relative values of wave height h/ho (a) and length 5..j5..o (b) along fetch
for different relative velocity 1' (Fig. 5.39c,d see next page)