摘要
经济快速发展的中国沿海地区,面临着潜在海啸袭击危险。海啸传播走时分析是海啸预警系统的重要组成部分。本文基于强震台网提供的地震要素,从理论上讨论海啸预警时间计算方法。在球坐标系下,建立了远洋海啸传播模型,采用差分技术,实现远洋海啸传播数值模拟,首次针对我国主要城市进行了海啸走时计算,分析了我国沿海走时特点,指出了未来发生在太平洋的远洋海啸对我国的长江三角洲会有较大影响。本文计算海啸走时方法可以为我国建设的新一代基于数值海啸预警系统提供技术支持。
Tsunami waves are the potential natural hazards suffered by the population living near the China coasts and the estimation of tsunami travel time is an effective way to mitigate the tsunami disaster. Based on the strong ground motion network, the theoretical concept of tsunami warning time is given. Under the spherical coordinate, the tsunami propagation model is built to simulate the transoceanic-tsunami travel time by finite difference method. The mathematical techniques and the details of the computations for the tsunami travel-time charts of the Chinese coast are described for the scenario tsunamigenic earthquakes and the results show the Shanghai economic zone has the highest tsunami hazard compared with other China coastal areas. The method suggested in this paper can be applied in the China tsunami warning system.
出处
《地震工程与工程振动》
CSCD
北大核心
2006年第2期20-24,共5页
Earthquake Engineering and Engineering Dynamics
基金
地震科学联合基金项目(课题号105023)
关键词
海啸
海啸地震
走时
数值差分
防灾减灾
tsunami
tsunamigenic earthquake
tsunami travel time
differential method
mitigation
