Numerical analysis of impacts of 2011 Japan Tohoku tsunami on China Coast  

作　　者：任智源 王本龙 范婷婷 刘桦 

机构地区：[1]Department of Engineering Mechanics, Shanghai Jiao Tong University [2]Department of Engineering Mechanics, MOE Key Laboratory of Hydrodynamics, Shanghai Jiao Tong University [3]National Marine Environmental Forecasting Center [4]State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University

出　　处：《Journal of Hydrodynamics》2013年第4期580-590,共11页水动力学研究与进展B辑（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant No. 10972138);the Natural Science Foundation of Shanghai Municipality (Grant No.11ZR1418200);the Key Doctoral Programme Foundation of Shanghai Municipality (Grant No. B206)

摘　　要：On the 1 lth of March, 2011, a subduction earthquake of magnitude Mw9.0 happened at the northeast of Japan, generating a tsunami which resulted in huge damage in Japan. Okada＇s elastic fault model is used to generate the deformation of the sea bottom based on USGS sources and UCSB sources respectively. The shallow water equations are solved by the adaptively refined finite volume methods so that it can compute the propagation of tsunami in the Pacific Ocean efficiently. The computed time series of the surface elevation are compared with the measured data from NOAA real-time tsunami monitoring systems for model validation, and UCSB sources derive better results than USGS sources. Furthermore, one nested domain with fine grid and higher topography reso- lution is combined to compute numerically this tsunami spreading in the Bohai Sea, Yellow Sea, East China Sea, and North of South China Sea. The impacts on China Coast and seas are analyzed and discussed. The results show that the tsunami has almost no impact in the Bohai Sea and Yellow Sea. It has some kind impact on the East China Sea and South China Sea. However, maximum wave height on China Coast is smaller than 0.5 m. It is thus concluded that the 2011 Tohoku tsunami did not generate a significant in- fluence on China Coast.On the 1 lth of March, 2011, a subduction earthquake of magnitude Mw9.0 happened at the northeast of Japan, generating a tsunami which resulted in huge damage in Japan. Okada＇s elastic fault model is used to generate the deformation of the sea bottom based on USGS sources and UCSB sources respectively. The shallow water equations are solved by the adaptively refined finite volume methods so that it can compute the propagation of tsunami in the Pacific Ocean efficiently. The computed time series of the surface elevation are compared with the measured data from NOAA real-time tsunami monitoring systems for model validation, and UCSB sources derive better results than USGS sources. Furthermore, one nested domain with fine grid and higher topography reso- lution is combined to compute numerically this tsunami spreading in the Bohai Sea, Yellow Sea, East China Sea, and North of South China Sea. The impacts on China Coast and seas are analyzed and discussed. The results show that the tsunami has almost no impact in the Bohai Sea and Yellow Sea. It has some kind impact on the East China Sea and South China Sea. However, maximum wave height on China Coast is smaller than 0.5 m. It is thus concluded that the 2011 Tohoku tsunami did not generate a significant in- fluence on China Coast.

关 键 词：Tohoku tsunami numerical simulation shallow water equation China Coast 

分 类 号：P731.25[天文地球—海洋科学]