超强台风对沙滩侵蚀及其防护研究  

Study on the beach erosion induced by super typhoons and beach protection

作　　者：董伟良 邵杰[1,2] 王卫远 姚文伟 DONG Wei-liang;SHAO Jie;WANG Wei-yuan;YAO Wen-wei(Zhejiang Institute of Hydraulics&Estuary,Hangzhou 310020,China;College of Harbor,Coastal and Offshore Engineering,Hohai University,Nanjing 210098,China;Huadong Engineering Corporation Ltd.,China Power Construction Group,Hangzhou 310014,China)

机构地区：[1]浙江省水利河口研究院浙江省河口海岸重点实验室,浙江杭州310020 [2]河海大学港口海岸与近海工程学院,江苏南京210098 [3]中国电建集团华东勘测设计研究院有限公司,浙江杭州310014

出　　处：《泥沙研究》2021年第4期42-47,共6页Journal of Sediment Research

基　　金：浙江省自然科学基金项目(LQ16E090004);浙江省科技计划项目(2018F10026)。

摘　　要：通过对深圳大小梅沙沙滩历史地形资料收集和现场调查,分析了沙滩海域海床冲淤变化情况及沙滩地形变化的主要动力因子,探讨了超强台风对沙滩的侵蚀破坏情况,研究了台风作用下泥沙运动特性。基于波浪-泥沙物理模型试验复演了超强台风对沙滩侵蚀破坏,通过对比人工岬角实施前后的沙滩地形变化,分析了人工岬角对沙滩稳定性的影响。研究结果表明:近20年间沙滩以侵蚀为主,海床整体处于冲淤交替的调整性演变;大浪条件下沙滩侵蚀较严重,岸滩存在一定幅度的冲淤调整。物理模型试验能够很好地复演沙质海滩受台风浪冲淤范围和幅度,人工岬角使得其附近海域波浪能量有所衰减,泥沙沿岸输送至岬角附近并淤积,减小了向远海的泥沙流失。Based on hydrological data and sandy beach topographies of the Dameisha Beach and the Xiaomeisha Beach in the Shenzhen City,the main factors influence seabed topography processes and changes of beach sand are analyzed.The beach erosion by the super typhoon is discussed and the sediment movement near the beach is studied.According to the wave-sediment physical model experiment,the erosion of beach by the super typhoon was reproduced.By comparing the changes of beach with or without artificial headland,the influence of artificial headland on the stability of the beach was studied.The results show that the seabed near the sandy beach is in a state of alternation of scouring and silting,and the beach has been eroded during the past 20 years.The beach is relatively stable under the conditions of annual average incoming wave,and eroded by large wave with sediment adjustment near the shore.The results of physical model experiment agree well with the topography processes of sandy beaches influenced by typhoon waves.Wave energy is reduced near the artificial headland,and the sand eroded on the beach is transported to the headland and deposited,which reduces the loss of sand.

关 键 词：波浪 海岸冲淤 台风 人工岬角 沿岸输沙 

分 类 号：TV148.7[水利工程—水力学及河流动力学]