• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Numerical modeling of tsunami waves.
【24h】

Numerical modeling of tsunami waves.

机译：海啸波的数值模拟。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This thesis provides a synthetic understanding and an extensive analysis on megathrust earthquake generated tsunamis, with emphasis on the application of numerical modeling. In the present thesis, the tsunami characteristics are first depicted as a special hydrodynamic phenomenon. Further, a detailed literature review on the recent developments in tsunami numerical modeling techniques and on their applications is presented. A common approach in modeling the generation, propagation and inundation of tsunamis is discussed and used in the thesis. Based on the assumption of a vertical displacement of ocean water that is analogous to the ocean bottom displacement during a submarine earthquake, and the use of a non-dispersive long-wave model to simulate its physical transformation as it radiates outward from the source region. A general analysis of the Indian Ocean Tsunami of December 26th, 2004 is provided; and tsunami generation and propagation is conducted for this tsunami, as well as for tsunamis occurring in the Arabian Sea and Northwest Pacific Ocean, near the coast of the Vancouver Island. The analyses are based on geological and seismological parameters collected by the author. In this paper the author uses the collected bathymetry and earthquake information, plus tide gauge records and field survey results, and focuses on the theoretical assumptions, validation and limitation of the existing numerical models. Numerical simulations are performed using MIRONE, a tsunami modelling software developed based on the nonlinear shallow water theory. Through numerical modeling of three tsunami scenarios, e.g. December 26, 2004 Indian Ocean Tsunami, November 28, 1945 Arabian Sea Tsunami and the potential Cascadia Tsunami, a vivid overview of the tsunami features is provided as discussed. Generally, the results fairly agree with the observed data. The GEOWARE software is used to compute the tsunami travel time necessary to calibrate the results from MIRONE, using different numerical techniques. Several sensitivity analyses are conducted so that one can understand how oceanic topography affects tsunami wave propagation, determine how smoothing the topography affects the simulated tsunami travel time, and interpret the tsunami wave-height patterns as seen in the model simulations. The model can predict reasonably the tsunami behaviour, and are thus useful for tsunami warning system (tsunami mitigation and preparedness); and coastal population and industry can prepare for such possible catastrophic events.
机译：本文对巨推力地震海啸产生了综合的认识和广泛的分析，重点是数值模拟的应用。本文首先将海啸特征描述为一种特殊的水动力现象。此外，提供了有关海啸数值建模技术及其应用的最新发展的详细文献综述。本文讨论并使用了一种常见的海啸发生，传播和淹没建模方法。基于这样的假设，即海水的垂直位移类似于海底地震期间的海底位移，并使用非分散长波模型来模拟其从源区域向外辐射时的物理转换。提供了2004年12月26日印度洋海啸的一般分析；并针对该海啸以及在温哥华岛海岸附近的阿拉伯海和西北太平洋发生的海啸进行海啸的产生和传播。这些分析是基于作者收集的地质和地震参数。本文作者利用收集到的测深和地震信息，加上潮汐计记录和野外调查结果，重点研究了现有数值模型的理论假设，验证和局限性。使用基于非线性浅水理论开发的海啸建模软件MIRONE进行数值模拟。通过对三种海啸情景的数值建模，例如2004年12月26日，印度洋海啸，1945年11月28日，阿拉伯海啸和潜在的卡斯卡迪亚海啸，对所讨论的海啸特征进行了生动概述。通常，结果与观察到的数据相当吻合。 GEOWARE软件用于使用不同的数值技术来计算校准MIRONE的结果所需的海啸传播时间。进行了几项敏感性分析，以便人们可以了解海洋地形如何影响海啸波的传播，确定地形的平滑度如何影响模拟海啸的传播时间，并解释模型模拟中看到的海啸波高模式。该模型可以合理地预测海啸行为，因此可用于海啸预警系统（减轻海啸和备灾）；沿海人口和工业可以为此类可能的灾难性事件做好准备。

著录项

  • 作者

    Xie, Jinsong.;

  • 作者单位

    University of Ottawa (Canada).;

  • 授予单位 University of Ottawa (Canada).;
  • 学科 Geophysics.;Engineering Civil.
  • 学位 M.A.Sc.
  • 年度 2007
  • 页码 148 p.
  • 总页数 148
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号