Abstract:

Abstract：Based on the measured data of meteorological and wind wave at different stations in Chaohu Lake, the characteristics of wind wave were analyzed in detail.During the observation period of different stations, the frequency of the significant wave height over 0.4 m was between 2.22% and 9.78%.The average significant wave height of Chaohu Lake during the observation period was about 0.11 m.The average period of wind wave in Chaohu Lake with an average of 2.18 s ranged from 1.45 s to 3.33 s.The upper zero-cross period of wind wave with an average of 2.13 s ranged from 1.37 s to 3.26 s.The peak period with an average of 2.30 s ranged from 1.01 s to 4.41 s.There were significant linear correlation between the peak period and the average wave period or the upper zero-cross period, and the correlation coefficients were 0.74 and 0.68, respectively.The wave energy of wind wave in Chaohu Lake was mainly concentrated in the frequency range of 0.2-0.6 Hz.That is, the energy was mainly distributed in the frequency range of 0.5 fp-1.5 fp.The spectrum was obviously different from the commonly used JONSWAP spectrum and PM spectrum.