摘要
基于环杭州湾县区多年实测风速资料,采用资料整理法分析风速时空分布规律,利用嵊泗站近65 a实测风速和台风最佳路径资料,基于多元回归分析法建立台风期嵊泗风速计算公式,结合湾顶乍浦增水情况,采用理论分析法建立乍浦风暴潮增水计算式,将6种不同风浪公式预测值与多年实测波浪进行比较,确定杭州湾风浪公式适用性。结果表明:环杭州湾风速总体呈下降趋势,下降速率呈“南岸>北岸>海岛”的分布特点;风速大小整体呈“海岛>北岸>南岸”的分布特点,越往内陆风速越小,最大风速和平均风速比值k与平均风速大小呈反相关;杭州湾风速相关性较高,平均相关系数为0.66,风速相关性随距离的增加而降低,海岛相关性最高,杭州湾北岸与南岸相关性最差;小风区海湾风浪联系式和基本式差异较小,大风区海湾风浪计算建议采用风浪基本式,杭州湾大风期风速和波高关系基本服从莆田风浪基本式。
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.
作者
董伟良
韩宇
邵杰
姚文伟
黄世昌
甘建军
Dong Weiliang;Han Yu;Shao Jie;Yao Wenwei;Huang Shichang;Gan Jianjun(Zhejiang Institute of Hydraulics&Estuary(Zhejiang Institute of Marine Planning and Design),Hangzhou 310020,China;College of Harbour,Coastal and Offshore Engineering,Hohai University,Nanjing 210003,China)
出处
《太阳能学报》
北大核心
2026年第1期683-691,共9页
Acta Energiae Solaris Sinica
基金
国家重点研发计划(2023YFC3007903)
浙江省自然科学基金(LZJWZ23E090005)
水利部重大科技项目(SKS-2022024)
浙江省水利厅科技计划(RB2220)。
关键词
杭州湾
时空数据
风速
潮汐
波浪传播
相关性
Hangzhou Bay
spatio-temporal data
wind speed
tides
wave propagation
correlation
