| 2010 年智利和2011 年日本地震海啸在我国东南沿岸诱导的波流特征及危险性分析 |
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| 引用本文： | 闪迪,王培涛,孙立宁,任智源,赵联大.2010 年智利和2011 年日本地震海啸在我国东南沿岸诱导的波流特征及危险性分析[J].海洋通报,2018(3):310-319. |
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| 作者姓名： | 闪迪 王培涛 孙立宁 任智源 赵联大 |
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| 作者单位： | 国家海洋环境预报中心国家海洋局海啸预警中心，北京100081,国家海洋环境预报中心国家海洋局海啸预警中心，北京100081；国家海洋环境预报中心海洋灾害预报技术研究国家海洋局重点实验室，北京100081,国家海洋环境预报中心海洋灾害预报技术研究国家海洋局重点实验室，北京100081,国家海洋环境预报中心国家海洋局海啸预警中心，北京100081,国家海洋环境预报中心国家海洋局海啸预警中心，北京100081；国家海洋环境预报中心海洋灾害预报技术研究国家海洋局重点实验室，北京100081 |
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| 基金项目： | 海洋公益性行业科研专项（201405026） |
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| 摘 要： | 本文基于有限断层模型和OKADA 位错模型计算海表变形场作为初始条件，利用MOST 海啸数值模型模拟分析了2010年智利和2011 年日本地震海啸在我国东南沿海地区的海啸传播特征，海啸波模拟结果与观测数据吻合较好。重点研究分析了沈家门港口海域的海啸波流特征及其诱导的涡旋结构。研究结果表明：尽管两次事件的海啸源位置及破裂特征完全不同，但海啸波流在我国东南沿岸的分布特征大致相似；另外相对于海啸波幅而言，港湾中海啸流具有更强的空间差异性，港口入口、岬角地形处和岛屿间水道中往往会有强流存在。尽管这两次越洋海啸均未能在我国东南沿海引发淹没情形，但通过数值计算发现局部均存在超过3 m/s 以上的强流，因此进行海啸预警及风险管理时应综合考虑海啸波流的影响。
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| 关 键 词： | 越洋海啸 沈家门港 海啸波流特征 海啸涡流 危险性评估 |
| 收稿时间： | 2017/11/2 0:00:00 |
| 修稿时间： | 2018/2/12 0:00:00 |
Characteristics and risk assessment of tsunami-induced currents in the southeast coast of China caused from the Chile Earthquake in 2010 and Japan Earthquake in 2011 |
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| SHAN Di,WANG Pei-tao,SUN Li-ning,REN Zhi-yuan and ZHAO Lian-da.Characteristics and risk assessment of tsunami-induced currents in the southeast coast of China caused from the Chile Earthquake in 2010 and Japan Earthquake in 2011[J].Marine Science Bulletin,2018(3):310-319. |
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| Authors: | SHAN Di WANG Pei-tao SUN Li-ning REN Zhi-yuan and ZHAO Lian-da |
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| Institution: | National Marine Environmental Forecasting Center, Tsunami Warning Center, State Oceanic Administration, Beijing 100081, China,National Marine Environmental Forecasting Center, Tsunami Warning Center, State Oceanic Administration, Beijing 100081, China;Key Laboratory of Research on Marine Hazards Forecasting, National Marine Environmental Forecasting Center,State Oceanic Administration, Beijing 100081, China,Key Laboratory of Research on Marine Hazards Forecasting, National Marine Environmental Forecasting Center,State Oceanic Administration, Beijing 100081, China,National Marine Environmental Forecasting Center, Tsunami Warning Center, State Oceanic Administration, Beijing 100081, China and National Marine Environmental Forecasting Center, Tsunami Warning Center, State Oceanic Administration, Beijing 100081, China;Key Laboratory of Research on Marine Hazards Forecasting, National Marine Environmental Forecasting Center,State Oceanic Administration, Beijing 100081, China |
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| Abstract: | In this paper, based on the finite fault model and the OKADA dislocation model, we calculated the sea surface deformation as the initial condition and used the Method of Splitting Tsunami (MOST) to analyze the 2010 Chile Earthquake and 2011 Japan Earthquake induced tsunami propagation characteristics on the southeast coast of China. The results of simulation are in good agreement with the observations. This research focused on the analysis of tsunami waves and currents characteristics and vortex structure induced by tsunami in Shenjiamen port. The results show although the location and rupture characteristics of the two tsunami sources are quite different, the distributions of tsunami waves and currents are approximately similar. In addition, relative to the tsunami waves, currents have much greater spatial diversity in port. It will be stronger flow in the harbor entrance, headland and inter island waterway. Although two transoceanic tsunami disasters did not cause inundation along China''s southeast coast, there are stronger currents over 3 m/s in the local regions by using numerical calculation. So it should take into account the impact of tsunami waves and currents on tsunami warning and risk management. |
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| Keywords: | transoceanic tsunami Shenjiamen port tsunami waves and currents characteristics tsunami-induced vortex flows risk assessment |
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