台风作用下长江口北槽挟沙能力研究  

Study on sediment carrying capacity under typhoon in North Passage of Yangtze Estuary

作　　者：韩玉芳[1,2] 窦希萍 HAN Yufang;DOU Xiping(Nanjing Hydraulic Research Institute,Nanjing 210024,China;Key Laboratory of Port,Waterway and Sedimentation Engineering of MOT,Nanjing 210024,China)

机构地区：[1]南京水利科学研究院,江苏南京210024 [2]港口航道泥沙工程交通行业重点实验室,江苏南京210024

出　　处：《海洋工程》2021年第6期1-9,77,共10页The Ocean Engineering

基　　金：国家自然科学基金资助项目(51979172)。

摘　　要：台风作用下水体的挟沙能力研究对深入认识台风暴潮作用下泥沙运动规律、滩槽演变特征以及提升数学模型和物理模型技术等方面具有重要意义。文中从台风波能对泥沙的悬浮作用入手,建立了台风浪作用下的挟沙能力公式;依据能量叠加原理,完善了传统的河口海岸挟沙能力公式(窦国仁挟沙能力公式),使公式能够同时概括潮流、波浪和台风浪作用下的泥沙运动特征,并应用近年来长江口北槽实测的台风期近底水沙资料对公式进行了率定验证,在此基础上分析了台风期北槽近底含沙量变化特征。The research of sediment carrying capacity under typhoon is of great significance in analyzing the sediment movement law,the evolution characteristics of beach trough,numerical and physical model in estuary and coast under typhoon storm surge action.In this paper,the formula of sediment carrying capacity under typhoon action is established according to the suspension effect of typhoon wave energy on sediment particles.On the basis of the energy superposition principle,the traditional formula of sediment carrying capacity of the estuary and coast is improved,so that the formula can summarize the sediment movement law under the action of tidal current,wave and typhoon waves at the same time,and the coefficient of the formula is calibrated by using the measured data of water and sediment near the bottom during typhoon period in the Yangtze Estuary in recent years.

关 键 词：河口海岸 长江口 台风 波能 挟沙能力 

分 类 号：TV148[水利工程—水力学及河流动力学]