NEESR Payload: Determining the Added Hazard Potential of Tsunamis by Interaction with Ocean Swell and Wind Waves

NEESR 有效负载：通过与海浪和风浪的相互作用确定海啸的附加危险潜力

• 批准号: 0936579
• 负责人: James Kaihatu
• 金额: $ 10万
• 依托单位: Texas A&M Engineering Experiment Station
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-10-01 至 2012-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0936579&HistoricalAwards=false
• 关键词: NEESR; Payload; Determining; Added; Hazard

This award is an outcome of the NSF 09-524 program solicitation "George E. Brown Jr. Network for Earthquake Engineering Simulation (NEES) Research (NEESR)" competition and includes Texas A&M University (lead institution). This project will utilize the NEES equipment site at Oregon State University. The destructive power of a tsunami on the world's coastlines is unquestioned; ample evidence can be seen in photos of the aftermath of the 2004 Indian Ocean tsunami. The scale of destruction, however, has perhaps inadvertently justified the study of tsunamis in isolation from the other components of the ocean wave climate. The intellectual merit of the proposed work is the investigation of the tsunami phenomenon not as an isolated event, but as an inherent part of the world's ocean climate. For all their differences in destructive power, size, and generation, tsunamis and swell waves (which are always present on the ocean surface) are both gravity waves, and follow many of the same physical laws. Additionally, gravity waves of different frequencies exchange energy, which affects the shape of the front face of the wave and, in turn, the destructive power, travel time, and damage potential (structural damage and erosion) of the tsunami. Experiments will be conducted in the NEES Tsunami Wave Basin during summer 2010 to investigate this interaction. Both tsunamis and swell-band waves will be generated, in isolation and in combination, and their interaction determined by analysis of the measured velocities and free surface heights. Both standard (Fourier-based) and advanced (Hilbert-Huang transforms) methods will be used to determine the degree of the tsunami-swell interaction and the resulting changes on the evolution of the front face of the tsunami wave. These data will be used to determine the change in the tsunami front face characteristics due to the interaction with swell waves and further deduce the effect to its destructiveness.The broader impacts of the proposed activities concern the effect of the investigation on the profession's present understanding of the destructive power of the tsunami. This may in turn alter present policies for evacuation, construction, and public safety in coastal areas potentially subject to tsunami inundation. In addition, the research team will work with the NEES Tsunami Basin Facility's education and outreach personnel to enhance their programs for public education and engaging students into science and engineering. This will include live demonstrations of the added effect of swell wave-tsunami interaction on the destructiveness of an onrushing tsunami. Data from this project will be archived and made available to the public through the NEES data repository.

该奖项是 NSF 09-524 项目征集“乔治·E·布朗地震工程模拟 (NEES) 研究网络 (NEESR)”竞赛的结果，其中包括德克萨斯 A&M 大学（牵头机构）。 该项目将利用俄勒冈州立大学的 NEES 设备场地。海啸对世界海岸线的破坏力是毋庸置疑的。 2004 年印度洋海啸后果的照片中可以看到充足的证据。 然而，破坏的规模也许无意中证明了将海啸与海浪气候的其他组成部分隔离开来进行研究的合理性。 拟议工作的智力价值在于对海啸现象的调查不是孤立的事件，而是世界海洋气候的固有组成部分。 尽管海啸和涌浪（始终存在于海洋表面）在破坏力、大小和产生方面存在差异，但它们都是重力波，并且遵循许多相同的物理定律。 此外，不同频率的重力波会交换能量，从而影响波前表面的形状，进而影响海啸的破坏力、传播时间和潜在破坏（结构破坏和侵蚀）。 2010 年夏季，我们将在 NEES 海啸波盆地进行实验来研究这种相互作用。 海啸和涌浪波都会单独或组合产生，它们的相互作用通过对测量的速度和自由表面高度的分析来确定。 标准（基于傅里叶）和高级（希尔伯特-黄变换）方法都将用于确定海啸-涌浪相互作用的程度以及由此产生的海啸波正面演变的变化。 这些数据将用于确定由于与涌浪相互作用而导致的海啸正面特征的变化，并进一步推断对其破坏性的影响。拟议活动的更广泛影响涉及调查对行业目前对海啸破坏力的理解的影响。 这可能反过来会改变可能遭受海啸淹没的沿海地区目前的疏散、建筑和公共安全政策。 此外，研究团队将与 NEES 海啸盆地设施的教育和外展人员合作，加强他们的公共教育计划，并让学生参与科学和工程。 这将包括现场演示涌浪与海啸相互作用对海啸破坏力的附加影响。该项目的数据将被存档并通过 NEES 数据存储库向公众开放。