ANALYSIS OF WAVE STATISTICAL CHARACTERISTICS OF TIDE FLAT IN FRONT OF OPEN-SEA SEAWALL

Huang Shichang; Dong Weiliang; Shi Lei; Shao Jie

doi:10.19912/j.0254-0096.tynxb.2024-1234

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (11) : 289-298. DOI: 10.19912/j.0254-0096.tynxb.2024-1234

ANALYSIS OF WAVE STATISTICAL CHARACTERISTICS OF TIDE FLAT IN FRONT OF OPEN-SEA SEAWALL

Huang Shichang, Dong Weiliang, Shi Lei, Shao Jie

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Abstract

Field measurements are made in front of the wave-dissipative seawall during two typhoonevents to investigate wave characteristics under varying tidal levels in ultra-shallow sea environments with highly gentle slopes. During tidal cycles, the maximum wave height-to-water depth ratio reaches 0.61. Post-breaking wave phenomena exhibit wave recombination. The root mean square （RMS） wave height-to-water depth ratio is relatively low, with a maximum value of approximately 0.3. Due to wave breaking, the ratio of the maximum wave height to the average wave height is found to be 1.46 and 1.47, respectively, during the two typhoon processes. The Rayleigh distribution is found to adequately fit the wave height distribution in water depths below 2 m, In constrast, the Glukhovskiy distribution provides a better fit for wave height distribution in water depths above 3 m. For water depths between 2 and 3 meters, the fitting accuracy of both distributions is slightly lower. For the measured wave, the skewness of the height distribution is primarily positive, while the kurtosis is negative. Its wave height distributionexhibits greater symmetry compared to the Rayleigh distribution, showing a flatter pattern and a wider domain than both the Rayleigh distribution and the Grukhovsky distribution . Moreover, a strong correlation is observed between the kurtosis and skewness coefficient of the measured wave. Spectral analysis reveals during Typhoon Khanun, lower-frequency surges are predominant, accompanied by a secondary low-frequency wave with weak energy. In contrast, during Typhoon Haikui, two primary low-frequency wavecomponents are dominant, while wind waves, which are relatively weak, are concentrated in the high-frequency range.

Key words

waves / tidal flats / floating PV / waveform analysis / wave breaking / distribution functions / field measurements

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Huang Shichang, Dong Weiliang, Shi Lei, Shao Jie. ANALYSIS OF WAVE STATISTICAL CHARACTERISTICS OF TIDE FLAT IN FRONT OF OPEN-SEA SEAWALL[J]. Acta Energiae Solaris Sinica. 2025, 46(11): 289-298 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1234

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