台风期间钱塘江嘉兴段高潮位预报研究

Research on High Tide Level Forecast of Jiaxing Reach of the Qiantang River during Typhoon

钱塘江嘉兴段常受台风的影响,尤其在天文大潮期间,台风产生增水引起特高潮位加之波浪,直接影响海塘的安全。通过激浦与盐官2个水文站历年的实际潮位资料分析,用其相关性来预报盐官天文潮,分析风暴潮增水与风力风向的关系,得到不同风力风向下的风暴增水计算值,再叠加天文潮潮位和对应不同风力风向等级的修正因子,可方便、快捷的计算得出台风期间产生的高潮位。

The Jiaxing Reach of the Qiantang River suffers frequently from typhoons.Especially during the astronomical tide period,the super high tide level and waves caused by typhoons can directly jeopardize the safety of seawalls.This study aims to predict the astronomical tide at Yangxian by analyzing the correlation of the actual tide level data at Ganpu and Zhapu over the years.By analyzing the relationship between the storm surge,wind force and wind direction,this paper obtains the storm surge calculation values under various wind forces and directions,which are superposed by correction factors of astronomical tide level and corresponding wind forces and wind direction to conveniently and rapidly calculate the high tide level.