GeoClaw Validation against the Great Tohoku Tsumani of 11 March 2011

针对 2011 年 3 月 11 日的 Great Tohoku Tsumani 的 GeoClaw 验证

• 批准号: 1137960
• 负责人: Randall LeVeque
• 金额: $ 10.09万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-01 至 2012-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1137960&HistoricalAwards=false
• 关键词: GeoClaw; Validation; against; Great; Tohoku

The Great Tohoku Tsunami of 11 March 2011 has generated massive quantities of data that will be invaluable in helping to validate tsunami models such as the GeoClaw software being developed by the PI and his collaborators. This RAPID project will provide short-term support for two postdoctoral fellows and two graduate students to assist in collecting data and performing simulations. The main goals are to further validate the software and constituent numerical algorithms as tools for tsunami modeling, and to compare a variety of proposed earthquake source mechanisms for this event that have been developed by different groups of seismologists. Data sources will include NOAA DART buoys, tide gauges, videos and photographs, and post-tsunami surveys, both in the near field and far field. The postdoctoral fellows are experts in tsunami science who have experience in working with a variety of tsunami data, also have experience working with the GeoClaw software in their thesis work. The software implements high-resolution finite volume methods for the nonlinear shallow water equations, with provisions to robustly model inundation. Adaptive mesh refinement is incorporated to allow the efficient solution of the problem over the vast range of spatial scales required.Tsunamis pose a severe threat to many coastal regions of the United States, particularly in the Pacific Northwest. The offshore Cascadia Subduction Zone (CSZ) running from Northern California up to British Columbia periodically produces a magnitude 9 earthquake, generating a tsunami of magnitude similar to that seen in the Indian Ocean in 2004 or from the Japanese tsunami of 2011 (The last major CSZ tsunami was in 1700). The entire West Coast, Hawaii, and Alaska are also at risk from tsunamis arising from many other potential sources. Hazard mitigation and early warning systems require accurate computer simulation tools based on mathematical models of the generation and propagation of tsunamis and the subsequent flooding and inundation along the coast. It is important to test these models against real events, and the 11 March 2011 Great Tohoku Tsunami provides a wealth of data from a variety of sources. Performing a careful series of computational experiments will assist in validating the computational model developed at the University of Washington and will guide the development of further improvements to the model.

2011年3月11日的东北大海啸产生了大量数据，这些数据对于帮助验证海啸模型（如PI及其合作者正在开发的GeoClaw软件）非常宝贵。这个快速项目将为两名博士后研究员和两名研究生提供短期支助，以协助收集数据和进行模拟。主要目标是进一步验证软件和组成的数值算法作为海啸建模的工具，并比较各种建议的震源机制，这一事件已经开发了不同的地震学家团体。数据来源将包括NOAA DART浮标、验潮仪、录像和照片以及海啸后的近场和远场调查。博士后研究员是海啸科学方面的专家，他们有处理各种海啸数据的经验，也有在论文工作中使用GeoClaw软件的经验。该软件实现了高分辨率有限体积法的非线性浅水方程，规定鲁棒模型淹没。自适应网格细化被纳入到允许的空间scales.Tsunamis的巨大范围内的问题的有效解决方案构成了严重的威胁，美国的许多沿海地区，特别是在太平洋西北地区。从北方加州到不列颠哥伦比亚省的卡斯卡迪亚俯冲带（CSZ）定期产生9级地震，产生的海啸与2004年印度洋或2011年日本海啸的规模相似（CSZ最后一次大海啸发生在1700年）。整个西海岸、夏威夷和阿拉斯加也面临着来自许多其他潜在来源的海啸的危险。 减灾和预警系统需要精确的计算机模拟工具，其基础是海啸的产生和传播以及随后沿海岸沿着的洪水和淹没的数学模型。用真实的事件来检验这些模型是很重要的，2011年3月11日的东北大海啸提供了来自各种来源的丰富数据。进行一系列细致的计算实验将有助于验证华盛顿大学开发的计算模型，并将指导对模型的进一步改进。