远区台风“三巴”对河口波浪增水和波生流影响数值模拟研究

doi:10.3969/j.issn.1001-909X.2019.03.003

海洋学研究 ›› 2019, Vol. 37 ›› Issue (3): 21-30.DOI: 10.3969/j.issn.1001-909X.2019.03.003

远区台风“三巴”对河口波浪增水和波生流影响数值模拟研究

任剑波^1,2, 何青^*1, 沈健³, 郭磊城¹, 徐凡¹

1.华东师范大学河口海岸学国家重点实验室上海 200241;
2.杭州绍逸环境技术有限公司浙江杭州 310007;
3.美国威廉玛丽学院弗吉尼亚海洋研究所美国弗吉尼亚州 23062

收稿日期:2019-03-12 修回日期:2019-04-21 出版日期:2019-09-15 发布日期:2022-11-14
通讯作者: *何青(1962-),女,教授,主要从事河口海岸水动力、泥沙运动及河床演变研究。E-mail:qinghe@sklec.ecnu.edu.cn
作者简介:任剑波(1981-),男,浙江绍兴市人,博士研究生,主要从事河口风暴动力和泥沙输运研究。E-mail:63938842@qq.com
基金资助:
国家自然科学基金项目资助(51739005);科技部项目资助(2016YFE0133700);上海市科委重点基金项目资助(18DZ1204802,18DZ1206400,19230711900)

Numerical simulation of the effect of a remote typhoon “Sanba” on wave set-up and wave-induced current in the Changjiang Estuary

REN Jian-bo^1,2, HE Qing^*1, SHEN Jian³, GUO Lei-cheng¹, XU Fan¹

1. State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200241, China;
2. Hangzhou Shaoyi Environmental Technology Co., LTD, Hangzhou, 310007,China;
3. Virginia Institute of Marine Science, College of William & Mary, Gloucester Point, Williamsburg, VA 23062, USA

Received:2019-03-12 Revised:2019-04-21 Online:2019-09-15 Published:2022-11-14

摘要/Abstract

摘要： 波浪增水和波生流是河口泥沙输运、地貌演变和污染物扩散的重要动力之一,但目前关于远区台风影响下长江口波浪增水和波生流的研究比较缺乏。本文建立了覆盖东中国海的台风-天文潮-波浪耦合三维数值模型,研究了远区台风“三巴”对长江口波浪增水和波生流的影响。结果表明:波浪从台风中心向近岸传播过程中,能量耗散引起波浪作用力的衰减和辐射应力的增大,产生波浪增水,长江口波浪增水在0.05 ~0.20 m之间,占台风总增水值的15%~22%。从NW向入射的台风浪产生自北向南的波生沿岸流,垂向上呈现三维结构,平均流速在0.05~0.20 m/s之间,占风暴潮流的15%~50%,充分说明了远区台风可以对长江口波浪增水和波生流产生明显影响,研究成果可以为河口极值水位和流速计算、泥沙输运、水下三角洲地貌演变等研究提供参考。

关键词: 远区台风, 长江口, 波浪增水, 波生流

Abstract: Wave set-up and wave-induced current are the significant dynamics for sediment transport, geomorphology and pollutant diffusion in estuaries, however, researches were rare under remote typhoon conditions in the Changjiang Estuary. In this study, we focused on the spatial distribution of wave set-up and wave-induced current under a remote typhoon named “Sanba” by a coupled 3-D model of typhoon-wind, tide and wave. The results showed that the radiation stress and wave set-up increased when wave propagated from the typhoon eye to coast due to wave energy dissipations, the maximum value of wave set-up could reach up to 0.05~0.20 m, which was 15%~22% of the total water level rise induced by typhoon. The along-shore current generated by wave were about 0.05~0.20 m/s, and could reach up to 15%~50% of storm-induced current. It implied that a remote typhoon could have significant influence on wave set-up and wind-induced current. The research could provide the basis for calculation of return period water level and current, sediment transport, geomorphological evolution of subaqueous delta and so on.

Key words: remote typhoon, the Changjiang Estuary, wave set-up, wave-induced current

中图分类号:

P731.2

任剑波, 何青, 沈健, 郭磊城, 徐凡. 远区台风“三巴”对河口波浪增水和波生流影响数值模拟研究[J]. 海洋学研究, 2019, 37(3): 21-30.

REN Jian-bo, HE Qing, SHEN Jian, GUO Lei-cheng, XU Fan. Numerical simulation of the effect of a remote typhoon “Sanba” on wave set-up and wave-induced current in the Changjiang Estuary[J]. Journal of Marine Sciences, 2019, 37(3): 21-30.

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远区台风“三巴”对河口波浪增水和波生流影响数值模拟研究

Numerical simulation of the effect of a remote typhoon “Sanba” on wave set-up and wave-induced current in the Changjiang Estuary

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