334
7 Wave Transformation in Ice-Covered Water
400
200
0
-200
0.00
20
10
0
-10
0.00
1.00
2 00
1.00
2.00
-e- -1
-----A- -2
~-3
-a-- -4
3.00
3.00
a)
ro, rads- 1
4.00
b)
ro, rad s· 1
4.00
Fig. 7.3. Non-linear energy transfer in water with ice cakes for different values of
the spectrum peakedeness 'Y = 1.0 (a) and 'Y = 3.3 (b): 1- deep water without ice;
2 -basin depth is 10m, ice thickness is 0.3 m; 3- water depth is 10m; ice thickness
is 0.5 m, 4 - water depth is 10m; ice thickness is 0.8 m
to the low-frequency range and narrowing ofthe wave frequency spectrum due
to ice. Calculations reveal that the intensity of energy flow is increased to the
high frequency range in the presence of ice, particularly to the frequency equal
to the double frequency of the spectrum maximum. This creates tendencies
for wave monochromatization.