浪流耦合对汕尾港台风风暴潮模拟的影响-海洋预报

浪流耦合对汕尾港台风风暴潮模拟的影响

单位：1. 国家海洋局汕尾海洋环境监测中心站, 广东汕尾 516600;
2. 国家海洋局南海预报中心, 广东广州 510000;
3. 热带海洋环境国家重点实验室, 中国科学院南海海洋研究所, 广东广州 510301

分类号：P731.23

出版年·卷·期（页码）：2020·37·第四期（30-37）

摘要：

利用浪流耦合的无结构网格嵌套海洋模式，选取对汕尾沿岸海域影响较大的两次台风风暴潮过程进行模拟，分析浪流耦合作用对汕尾风暴潮增水的影响。结果表明：考虑浪流耦合的影响不仅能够将汕尾港风暴潮主振阶段的增水模拟误差减小5~10 cm，而且可以更好地刻画出港内增水的双峰结构，使得模拟结果的增水峰值时刻准确度提高近1 h。进一步的分析发现，汕尾港内浪致增水过程先于大风、低压引起的增水过程。同时，流场结果的对比表明：在风暴潮主振过程期间，浪流耦合作用对红海湾内的流场影响较为稳定，而对汕尾港入海口的流场影响较大。研究结果对防灾减灾和应急搜救工作有一定的参考意义。

Based on a nested and wave-current coupling ocean model on unstructured grids, two storm surges which affected Shanwei Port were simulated to analysis the effects of wave-current interaction on surge process. The results show that the error of storm surge level and peak-time can be reduced by 5~10 cm and nearly 1 hour respectively, and the double peak value during surge period is well simulated when considering the impacts of wave-current interaction. In addition, it is found that wave-induced set-up is ahead of surge induced by gale and low air pressure. Wave-induced current is stable in the Honghai Bay while varies considerably off the port entrance. The results are expected to improve the marine disaster prevention and maritime emergency rescue work.

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