The 12th International Conference on Hydrodynamics
18 – 23 september 2016, Egmond aan Zee, The Netherlands
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SCENARIOS OF FLOW FIELDS INDUCED BY POTENTIAL TSUNAMI IN SOUTH CHINA SEA


Go-down ichd2016 Tracking Number 41

Presentation:
Session: Hydrodynamics in Ocean II
Room: Room 3
Session start: 14:00 Mon 19 Sep 2016

Zhiyuan Ren   844869159@qq.com
Affifliation: National Marine Environmental Forecasting Center of China

Xi Zhao   xzhao_2000@sjtu.edu.cn
Affifliation: Shanghai Jiao Tong University

Benlong Wang   benlongwang@sjtu.edu.cn
Affifliation: Shanghai Jiao Tong University

Hua Liu   hliu@sjtu.edu.cn
Affifliation: Shanghai Jiao Tong University


Topics: - Hydrodynamics in ocean, coastal and estuary engineering

Abstract:

Since 2004 Indian Ocean tsunami, the significant advancements of tsunami warning system and methodology had obtained more attention. As a matter of fact, the currents induced by the tsunami may bring damages, especially for ports and harbors (Lynett et al., 2012). Crescent City Harbor suffered damages of $28 million by the currents from the 2006 Kuril Islands tsunami, and $26 million from the 2011 Japan tsunami (Admire et al., 2014). At Crescent City, the observed velocities ranged from 2 to 4.5 m/s for Japan tsunami. As Manila Trench is becoming one of the most hazardous tsunami source region (Ren et al. , 2014), the potential extreme tsunami hazards of the worst case scenario (Mw=9.3) in South China Sea are investigated numerically. Using the shallow water equations, the tsunami hazards in terms of time series of surface elevation, arrival time, maximum amplitude and velocity distribution are analyzed. The characteristics of wave amplitude and currents are presented and analyzed. The numerical results show that the most energy of tsunami wave distributes in central and north part of South China Sea, and the most tsunami-hazardous regions are southeast coast of Hainan, Guangdong, Taiwan, Philippines, and Eastern Vietnam. The maximum wave amplitude near Guangdong Province, Hainan Island, and Taiwan Island exceeds 4 m, and velocities at most measured locations near coast exceeds 2 m/s. Nested grid with high resolution is used to study the impacts of the tsunami on Hainan Island, Taiwan Island, and Lingding Bay. The regions with high level hazard are identified.