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| 珠江河口区风暴潮增水过程非线性叠加效应研究 |
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胡仕焜1,2, 刘丙军1,2, 邱江潮3, 曾慧4, 张明珠4, 李丹4
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1.中山大学 土木工程学院, 广东 珠海 519082;2.华南地区水循环与水安全广东省普通高校重点实验室, 广东 广州 510275;3.中山大学 地理科学与规划学院, 广东 广州 510275;4.广州市水务科学研究所, 广东 广州 510220
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| 摘要: |
| 珠江河口区水网密布,水动力条件复杂,风暴潮增水过程存在明显非线性叠加特征。本文运用ADCIRC (Advanced Circulation Hydrodynamic model)与SWAN (Simulating Waves Nearshore)模型,以1713号台风“天鸽”为实例,构建了珠江河口区风暴潮增水数值模拟模型,研究了珠江河口区风暴潮增水非线性叠加特征,得出如下结论:(1)在台风强度不变的情况下,在珠江口西岸登陆台风带来的增水最大,在伶仃洋西岸超过2 m。(2)风暴潮在珠江口西岸、东岸、河口区登陆,在高低潮和低低潮登陆带来的非线性效应水位较高,最高超过1 m。在高高潮和高低潮期登陆带来的非线性效应水位较低,最低非线性水位接近0 m。在珠江口西岸登陆的台风,其风暴潮-天文潮的非线性效应最大。 |
| 关键词: 珠江口 风暴潮增水 非线性叠加 |
| DOI：10.11759/hykx20220105004 |
| 分类号:P72 |
| 基金项目:广州市水务科技项目(GZSWKJ-2020-2);国家自然科学基金项目(52179029,51879289) |
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| Nonlinear effects of a storm surge in the Pearl River estuary |
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HU Shi-kun1,2, LIU Bing-jun1,2, QIU Jiang-chao3, ZENG Hui4, ZHANG Ming-zhu4, LI Dan4
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1.School of civil engineering, Sun Yat-sen University, Zhuhai 519082, China;2.Key Laboratory of Water Cycle and Water Security in Southern China of Guangdong High Education Institute, Guangzhou 510275, China;3.School of Geography and Planning, Sun Yat-sen University, Guangzhou 510275, China;4.Guangzhou Water Research Institute, Guangzhou 510220, China
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| Abstract: |
| The hydrodynamic conditions of tide and runoff are complex in the Pearl River estuary. The surge process has obvious nonlinear superposition characteristics in this area. Using the advanced circulation hydrodynamic model and simulating waves nearshore model and considering the “1713” typhoon Tiange as an example, this study developed a numerical simulation model for storm surge and determined the nonlinear characteristics of a storm surge in the Pearl River estuary. The conclusions are as follows: (1) For a given typhoon intensity, a typhoon landing on the western region of the Pearl River estuary brings the largest water increase, and the nonlinear effect between astronomical tide and storm surge is the largest, at more than 2 m on the west bank of Lingdingyang. (2) The nonlinear effects of a storm surge are extremely similar regardless of whether the typhoon lands in the western, eastern, or central part of the Pearl River estuary. During higher and lower high tides, the nonlinear effect caused by the storm surge–tide interaction is minimal, and the lowest nonlinear water level is almost 0 m. Moreover, the nonlinear effect of the storm surge–tide interaction is the largest for a typhoon landing on the west bank of the Pearl River estuary. |
| Key words: Pearl River estuary storm surge nonlinear effects |