Search

Measurements of wind waves have been done in the decay area of large scale wind flume, at one end of which a certain length was remained as the generating area. One-dimensional wave spectrum has been studied associated with the analysis of wave properties obtained directly from the wave record. The Gaussian hypothesis of wind wave was not particularly substanciated in the generating area nor in the initial part of the decay area. However, as the propagation of the waves in decay area and as the decrease of non-linearity of waves the frequency distribution approached gradually to the Gaussian distribution. Wave spectrum in decay area showed the following interesting characteristics: The dissipation of wave energy at high frequency part was very close to that due to molecular viscosity, but the dissipation of energy was much greater than that due to molecular viscosity near the dominant peak of the spectrum where some excess energy was observed as compared with the univarsal form of wave spectrum. S...