基于二维浅水方程和SWAN模型的风暴潮模拟研究  

Storm Surge Simulation Based on Two-Dimensional Shallow Water Equations and SWAN Model

作　　者：于英霞 张秀姬 宋怀辉 YU Yingxia;ZHANG Xiuji;SONG Huaihui(Civil Engineering School,Henan University of Science&Technology,Luoyang 471023,China;College of Civil Engineering,Luoyang Institute of Science and Technology,Luoyang 471023,China)

机构地区：[1]河南科技大学土木工程学院,河南洛阳471023 [2]洛阳理工学院土木工程学院,河南洛阳471023

出　　处：《河南科技大学学报（自然科学版）》2022年第6期67-73,M0007,共8页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家自然科学基金青年基金项目(51709141)。

摘　　要：基于二维浅水方程自主构建的风暴潮模型与浅水波浪数值模型(SWAN)双向耦合,本文建立了波浪-潮流耦合模式。风暴潮模型将风场、水位和流场代入SWAN模型中,SWAN模型又将受波浪状态影响的表面风应力和辐射应力项反馈给风暴潮模型。该耦合模式可描述风暴潮与波浪之间复杂的非线性作用。对台风温妮(Winnie)影响期间上海沿海地区的风暴潮进行模拟计算,结果表明:耦合模式4个站点最高潮位平均相对误差仅7.2%,较未考虑波浪作用的非耦合模式精度提高了2.3%;受上海沿海特殊地形的影响,风暴潮最高潮位时刻波浪对杭州湾的潮流场影响较大,对长江口的增水作用较明显。The storm surge model self-constructed based on the two-dimensional shallow water equations and the simulating waves nearshore(SWAN)model were two-way coupled.A wave-current coupling model was developed.The storm surge model passed the computed wind velocities,water levels and currents to SWAN,and SWAN computed the wave-dependent surface wind stresses and radiation stresses and passed them to the storm surge model.The complex nonlinear interaction between storm surge and waves was well performed by the coupled model.Numerical experiments were conducted to simulate the storm surge in the coastal areas of Shanghai during Typhoon Winnie.The results show that the average relative error of the peak water level at the four stations of the coupled model is only 7.2%.The accuracy is improved by 2.3%,comparing with the uncoupled model without considering the wave effect.Influenced by the special topography of the Shanghai coast,the wave has a greater impact on the tidal field in Hangzhou Bay and has a more pronounced effect on the water level increasing in the Yangtze estuary at the moment of the peak water level.

关 键 词：台风 风暴潮 波浪 耦合模型 

分 类 号：P731.23[天文地球—海洋科学]