基于SWASH模型的珊瑚岛礁波生环流模拟研究  

Simulation of wave-induced circulation in coral reef by SWASH model

作　　者：陈松贵 王建平 高骏[3] 谭召 CHEN Song-gui;WANG Jian-ping;GAO Jun;TAN Zhao(Tianjin Research Institute for Water Transport Engineering,Tianjin 300456,China;Unit 91053,Beijing 100070,China;China Shipbuilding Ninth Design and Research Institute Engineering Co.Ltd.,Shanghai 200063,China;Harbor Engineering Design Institute Co.Ltd.,of CCCC fourth Harbor Engineering Bureau,Guangzhou 510220,China)

机构地区：[1]交通运输部天津水运工程科学研究所,天津300456 [2]91053部队,北京100070 [3]中船第九设计研究院工程有限公司,上海200063 [4]中交四航局港湾工程设计院有限公司,广州510220

出　　处：《水道港口》2022年第3期281-288,369,共9页Journal of Waterway and Harbor

基　　金：国家自然科学基金(52001149,52039005,51861165102);中国科协青年人才托举工程(2018QNRC001);中央级公益性科研院所科研创新基金项目(TKS20200204,TKS20210102,TKS20210110)。

摘　　要：珊瑚礁地形是热带和亚热带近岸浅海地区的显著特征之一。不同于以往常见的近岸缓变地形的水动力环境,岛礁附近水深剧烈变化且存在潟湖和裂口等,导致礁坪上产生显著的波浪增水、波生流现象。采用非静压模型SWASH模拟研究了不同外海波高、周期和礁坪淹没水深对礁坪波高和波浪增水的影响。结果表明波浪通常在礁缘处发生破碎,波高在礁坪上沿程减小,礁坪上的波浪增水随入射波高、周期增大而增大,随礁坪的淹没水深增大而减小。在增水正压力和辐射应力的驱动下在礁坪上形成向岸流、在裂口中形成离岸出流,产生外海-礁坪-潟湖-裂口的水平环流系统。岛礁环流随外海入射波高的增大而增大,礁坪上流速随周期增大而增大,其他区域随礁坪淹没水深和周期变化不明显。Coral reefs are one of the significant features of tropical and subtropical coastal topographies.Different from the hydrodynamic environment of the continental coast,the water depth near the reef varies dramatically and there are lagoons and channels,resulting in significant wave set-up and circulation over the reef flat.The effects of wave height,wave period and submerged depth on wave height and wave increase were studied by using the non hydrostatic model SWASH.The results show that the wave usually breaks at the edge of the reef,and the wave height decreases along the reef flat.The wave increase on the reef flat increases with the increase of the incident wave height and period,and decreases with the increase of the submerged depth of the reef flat.Driven by the positive pressure of increasing water and the radiation stress,the coastal current is formed on the reef flat,and the offshore current is formed in the rift,resulting in the horizontal circulation system of open sea reef flat lagoon rift.The island reef circulation increases with the increase of the incident wave height,but does not change significantly with the submerged depth and wave period except that velocity on reef flat increases with increasing wave period.

关 键 词：近岸环流 波浪增水 珊瑚岛礁 SWASH模型 

分 类 号：U65[交通运输工程—港口、海岸及近海工程] TV143[交通运输工程—船舶与海洋工程]