| 引用本文： |
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韦聪,陈波,朱冬琳,张继云.台风“马鞍”影响北部湾水动力的数值模拟分析[J].广西科学,2025,32(1):161-173. [点击复制]
- WEI Cong,CHEN Bo,ZHU Donglin,ZHANG Jiyun.Numerical Simulation Analysis of Influences of Typhoon Ma-on on the Water Dynamics of the Beibu Gulf[J].Guangxi Sciences,2025,32(1):161-173. [点击复制]
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| 摘要: |
| 为探究登陆北部湾北部的台风对北部湾近岸海洋动力环境的影响，本研究基于防城港近海实测海流与潮位数据，利用水动力模型FVCOM (Finite Volume Coastal Ocean Model)并结合Ueno Takeo风场模型构建北部湾三维风暴潮数值模型，模拟台风“马鞍”过境期间北部湾近岸水动力环境的变化。结果表明，风暴潮最大增水为78 cm，此后水位出现一次增水振幅为25 cm的余震动；台风“马鞍”过境期间，北部湾近岸低频流动从表层到底层由东北流向转变为西南流向，流速迅速增大，出现西向风暴射流，强流区的流核在水平上主要分布于距离近岸0-20 km，而在垂向上位于10 m水深以内的海域，且基本沿着10 m等深线分布。通过对动量方程各项的分析发现，正压梯度力项、时间变化项、水平对流项以及垂直扩散项变化显著，其中，正压梯度力变化是近岸西向风暴射流产生的重要因素之一。台风“马鞍”过境期间，非线性水位变化会影响增水出现的时间及幅度。本研究结果可为近海生态环境保护提供重要的理论依据。 |
| 关键词: 台风 风暴潮 近岸西向流 FVCOM 北部湾 |
| DOI：10.13656/j.cnki.gxkx.20250225.001 |
| 投稿时间：2024-05-07修订日期：2024-07-03 |
| 基金项目:国家自然科学基金项目(42066002)，国家自然科学基金联合基金项目(U20A2099)和广西科学院发展基金项目(022107438)资助. |
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| Numerical Simulation Analysis of Influences of Typhoon Ma-on on the Water Dynamics of the Beibu Gulf |
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WEI Cong, CHEN Bo, ZHU Donglin, ZHANG Jiyun
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| (Guangxi Coastal Key Laboratory of Marine Environmental Science, Guangxi Academy of Marine Sciences (Guangxi Mangrove Research Center), Guangxi Academy of Sciences, Nanning, Guangxi, 530007, China) |
| Abstract: |
| The aim of this study is to investigate the influences of typhoon landfall in the northern Beibu Gulf on the coastal hydrodynamic environment of the Beibu Gulf.Based on the measured data of tide level and current in Fangchenggang,the hydrodynamic model Finite Volume Coastal Ocean Model (FVCOM),and the Ueno Takeo typhoon wind field model,a three-dimensional numerical model of storm tide in the Beibu Gulf was constructed to simulate the variations of the coastal hydrodynamic environment during the transit of typhoon Ma-on.The results showed that the maximum storm surge elevation simulated by the model was 78 cm,and then there was a residual vibration with the water level increase of 25 cm.During the transit of typhoon Ma-on,the direction of the low-frequency current from surface to bottom in the coastal area of the Beibu Gulf changed from being northeastward to being southwestward,with a rapid increase in velocity and the appearance of the westward storm jet.The flow core of the strong westward storm jet was distributed horizontally within 0-20 km and vertically within 10 m in the coastal area,and distributed along the 10 m isobath.The analysis of the momentum equation showed that barotropic pressure gradient force,time variation,horizontal advection,and vertical diffusion changed significantly,and the variation in barotropic pressure gradient force was one of the key factors causing the formation of the westward storm jet in the coastal area.The nonlinear variation in water level during the transit of typhoon Ma-on influenced both the timing and magnitude of storm surge elevation.The research results provide a theoretical basis for the coastal eco-environment protection. |
| Key words: typhoon storm surge westward current in coastal area FVCOM Beibu Gulf |
