大亚湾风暴潮波浪传播数学模型  

Numeric modeling of storm surge wave propagation in Daya Bay

作　　者：李大鸣[1] 甄珠[1] 李彦卿[1] 唐星辰[1] 张弘强 陈硕[1] LI Daming;ZHEN Zhu;LI Yanqing;TANG Xingchen;ZHANG Hongqiang;CHEN Shuo(State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin,300350,China)

机构地区：[1]天津大学水利工程仿真与安全国家重点实验室,天津300350

出　　处：《海洋通报》2018年第1期45-54,共10页Marine Science Bulletin

基　　金：国家社科基金重大项目(14ZDB131)

摘　　要：本文建立了大亚湾风暴潮涌浪传播数学模型,以任意多边形离散计算海区,每一多边形构成单元,以波浪运动学和动力学守恒方程模拟单元内能量传递,以风暴潮过程模拟边界入射波高过程,用风暴潮涌浪传播基本方程和波能缓坡方程结合模拟湾口巨浪向湾内的传播过程。通过分析大亚湾不同种类岸线反射系数的概率分布,并结合实测波高对模型进行率定,最终确定模型参数。将大亚湾特征点计算波高与统计推荐波高比较进行模型验证,结果显示SE向波高与H_(13%)推荐波高对应较好,可以用于大亚湾海区的波浪预报。计算当大亚湾口分别出现10年一遇、50年一遇及100年一遇的波高时,在E、ESE以及ES向入射波浪条件下大亚湾海域极值波高的分布。分别对风暴潮涌浪在不同类型岸线的爬高以及风暴潮涌浪传播对岸线的作用力进行计算。Numeric Modeling of storm surge wave propagation in Daya Bay was established;the sea area of calculation dispersed with random polygon;each polygon formed a unit;the energy transfer in the unit was simulated by surge kinematic conservation equation and dynamics conservation equation;the process of boundary incidence wave height was simulated by the storm surge process,and simulating the process of billow diffuses from the bay mouth to the bar inner with the basic equations of storm surge wave propagation and equations of wave energy of slow slope.The model parameters was determined by analyzing wave reflection coefficient probability distributions of different kinds of shoreline of Daya Bay and combined with the measured wave height to calibrate model.The model was verified by compared the calculated wave height of feature points with statistical recommended wave height,and the results showed that the SE wave height corresponded well with the H!3%recommended wave height,and the model can be used in the Daya Bay wave forecast.The extreme wave height distributions in Daya Bay mouth were calculated when there were once in a decade,a once-in-half-century and once-in-a-century wave heights,under the incident angle of E,ESE and ES.The surgerunup and force in different kinds of shoreline were calculated.

关 键 词：风暴潮 数学模型 大亚湾 极值波高 反射系数 

分 类 号：X43[环境科学与工程—灾害防治] P731.22[天文地球—海洋科学]