CHARACTERISTICS OF WIND SPEED IN HANGZHOU BAY AND ITS RELATIONSHIP WITH TIDAL LEVEL AND WAVES

Dong Weiliang; Han Yu; Shao Jie; Yao Wenwei; Huang Shichang; Gan Jianjun

doi:10.19912/j.0254-0096.tynxb.2024-1659

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (1) : 683-691. DOI: 10.19912/j.0254-0096.tynxb.2024-1659

CHARACTERISTICS OF WIND SPEED IN HANGZHOU BAY AND ITS RELATIONSHIP WITH TIDAL LEVEL AND WAVES

Dong Weiliang¹, Han Yu¹, Shao Jie^1,2, Yao Wenwei¹, Huang Shichang¹, Gan Jianjun¹

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Abstract

In this study, the spatial and temporal distributions of wind speed are analyzed based on many years of measured wind speed data from the region around Hangzhou Bay. Using 65 years of measured wind speed and typhoon best-track data from Shengsi Station, a multiple regression analysis method is used to establish a formula to calculate wind speed during typhoons at Shengsi. Storm surge water level increase data from Zhapu in the northern region of Hangzhou Bay are combined with theoretical analysis to establish a formula to calculate storm surge water increase in Zhapu. Finally, the applicability of 6 different wind wave formulas for Hangzhou Bay are assessed by comparing the predicted values against observed wave measurements at Zhapu Station. The results show that the wind speed generally shows a decreasing trend in the reqion around Hangzhou Bay, with the largest decrease in magnitude occurring near the south bank of Hangzhou Bay, followed by the north bank of Hangzhou Bay and then the islands. The wind speed decreases as it moves further inland, with wind speed on the islands being the greatest, followed by the north bank and the south bank of Hangzhou Bay. The ratio k between the maximum wind speed and the average wind speed is inversely correlated with the average wind speed. The correlation of wind speed in Hangzhou Bay is high, with an average correlation coefficient of 0.66. The wind speed correlation decreases with increasing distance, and the correlation among islands is the highest, followed by the north bank and then the south bank of Hangzhou Bay. There is little difference between the connection formula and the basic formula in a short wind field, but there is a significant difference in the long wind field. The relationship between wind speed and wave height in Hangzhou Bay during periods of strong winds essentially obeys the Putian basic formula. It is advisable to calculate wind waves in the bay for a long wind field using the basic formula.

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Hangzhou Bay / spatio-temporal data / wind speed / tides / wave propagation / correlation

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Dong Weiliang, Han Yu, Shao Jie, Yao Wenwei, Huang Shichang, Gan Jianjun. CHARACTERISTICS OF WIND SPEED IN HANGZHOU BAY AND ITS RELATIONSHIP WITH TIDAL LEVEL AND WAVES[J]. Acta Energiae Solaris Sinica. 2026, 47(1): 683-691 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1659

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