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

该奖项是NSF 09-524项目招标“小乔治·e·布朗地震工程模拟（NEES）研究网络（NEESR）”竞赛的结果，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设备站点。海啸对世界海岸线的破坏力是毋庸置疑的；从2004年印度洋海啸后的照片中可以看到充分的证据。然而，破坏的规模可能无意中证明了将海啸与海浪气候的其他组成部分分开研究的合理性。这项工作的学术价值在于，它不是把海啸现象作为一个孤立的事件来研究，而是把它作为世界海洋气候的一个固有部分来研究。尽管海啸和巨浪（总是出现在海面上）的破坏力、大小和产生方式不同，但它们都是引力波，并遵循许多相同的物理定律。此外，不同频率的重力波交换能量，从而影响波前面的形状，进而影响海啸的破坏力、传播时间和破坏潜力（结构破坏和侵蚀）。2010年夏季将在NEES海啸波盆地进行实验，以调查这种相互作用。海啸和膨胀带波将单独或联合产生，它们的相互作用由对测量速度和自由表面高度的分析确定。标准（基于傅里叶的）和先进（希尔伯特-黄变换）方法将被用于确定海啸-涌浪相互作用的程度以及由此产生的海啸波前面的演变变化。这些数据将用于确定海啸与涌浪相互作用导致的海啸锋面特征的变化，并进一步推断其破坏性的影响。拟议活动的更广泛影响涉及调查对专业人员目前对海啸破坏力的认识的影响。这可能会反过来改变目前的疏散政策，建设，以及可能受到海啸淹没的沿海地区的公共安全。此外，研究小组将与NEES海啸盆地基金的教育和外联人员合作，加强他们的公共教育计划，吸引学生参与科学和工程。这将包括现场演示巨浪-海啸相互作用对冲来的海啸破坏性的附加影响。该项目的数据将存档，并通过NEES数据储存库向公众提供。

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.