Collaborative Research: Long (Tsunami) Waves in Riverine Estuaries

合作研究：河口的长波（海啸）

• 批准号: 1830024
• 负责人: Harry Yeh
• 金额: $ 43.31万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-10-01 至 2023-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1830024&HistoricalAwards=false
• 关键词: Collaborative; Research; Long; Tsunami; Waves

Physics of tsunami propagation through riverine environments is not understood well enough to quantify the hazard with reasonable confidence. Unanticipated tsunami behavior in rivers can be harmful to riverine ports, marinas, bridges, and other critical infrastructure. Tsunami penetration in rivers is largely determined by the interaction among the flow components of the tsunami, river, and tide as well as by river morphology. This project utilizes analytical, laboratory experimental and numerical modeling work, designed to reveal the conditions that determine tsunami intrusion and propagation in rivers. The findings would enable accurate predictions of riverine tsunami transformation that is directly beneficial for public safety and for reducing infrastructure damage in areas along rivers. The research program emphasizes education for undergraduate and graduate students entering the fields of physical oceanography, applied mathematics and engineering. Because of the topic's appeal, the project will be effective in promoting students to further advance their education and research, thereby potentially leading them to academic careers. The laboratory experiments will yield the time evolution of complex long-wave patterns which will be packaged into visual material that could be used in classrooms from high school to college graduate levels; the material will emphasize the tight linkage between mathematics and oceanography. In addition, outcomes from laboratory experiments will yield solid benchmark cases for the validation of numerical codes for simulating tsunamis in rivers suitable for benchmark testing within the research community. The research is designed to advance fundamentals in tsunami mechanics through the integration of theoretical approaches, numerical simulation, and laboratory experiments, all guided by field data analyses. It will bring insight into the mechanics associated with tsunami transition into a river, thereby leading us to identify which adjustments should be made to improve numerical representation of these critical tsunami processes. The specific questions to be addressed are: 1) how incident tsunamis transmit their energy through the river-mouth environment, 2) explaining why tsunami intrusion into a river results in a prolonged water accumulation, and 3) exploring interactions of tsunamis with river discharge. For analytical considerations, the large body of work from the tidal research community, will be utilized to determine which existing theoretical consideration for propagation of tides in rivers are applicable to tsunamis. Numerical simulations will be implemented for field-scale conditions, guided by 2011 Japan observations, to determine the physical parameters necessary to properly design the laboratory experiments. In addition, numerical experiments will be carried out in tandem with the controlled laboratory experiments to further explore the hydrodynamics associated with the tsunami transition from ocean to river. The laboratory research makes use of two different but complimentary experimental facilities: 1) a 2D flume designed to study the interaction between free surface waves, internal waves, and vertically sheared currents at the University of Southern California, and 2) a 3D wave basin designed for the high-precision study of nonlinear free surface wave transformation in the horizontal plane at Oregon State University.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

人们对海啸在河流环境中传播的物理学了解还不够透彻，无法以合理的置信度量化危害。河流中意外的海啸行为可能会对河港、码头、桥梁和其他关键基础设施造成损害。海啸对河流的渗透很大程度上取决于海啸、河流和潮汐的水流成分之间的相互作用以及河流形态。该项目利用分析、实验室实验和数值模拟工作，旨在揭示决定海啸入侵和在河流中传播的条件。这些发现将能够准确预测河流海啸的转变，这对公共安全和减少沿河地区基础设施的破坏直接有益。该研究项目强调对本科生和研究生进入物理海洋学、应用数学和工程学领域的教育。由于该主题的吸引力，该项目将有效促进学生进一步推进他们的教育和研究，从而有可能引导他们走向学术生涯。实验室实验将产生复杂的长波模式的时间演化，这些模式将被打包成视觉材料，可在从高中到大学研究生水平的课堂上使用；该材料将强调数学和海洋学之间的紧密联系。此外，实验室实验的结果将产生可靠的基准案例，用于验证模拟河流海啸的数值代码，适合研究界的基准测试。该研究旨在通过理论方法、数值模拟和实验室实验的整合，推进海啸力学的基础知识，所有这些都以现场数据分析为指导。它将深入了解与海啸过渡到河流相关的力学，从而引导我们确定应该进行哪些调整来改进这些关键海啸过程的数值表示。 要解决的具体问题是：1）海啸如何通过河口环境传递能量，2）解释为什么海啸侵入河流会导致长期积水，3）探索海啸与河流流量的相互作用。出于分析考虑，潮汐研究界的大量工作将用于确定哪些现有的潮汐在河流中传播的理论考虑适用于海啸。将在 2011 年日本观测结果的指导下，对现场规模条件进行数值模拟，以确定正确设计实验室实验所需的物理参数。此外，数值实验将与受控实验室实验同时进行，以进一步探索与海啸从海洋过渡到河流相关的流体动力学。该实验室研究利用了两种不同但互补的实验设施：1）南加州大学设计用于研究自由表面波、内波和垂直剪切流之间相互作用的 2D 水槽，以及 2）设计的 3D 波池俄勒冈州立大学水平面非线性自由表面波变换的高精度研究。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Long-Wave Penetration through a Laterally Periodic Continental Shelf

长波穿过横向周期性大陆架

• DOI: 10.3390/jmse8040241
• 发表时间: 2020-04
• 期刊: Journal of Marine Science and Engineering
• 影响因子: 2.9
• 作者: Knowles, Jeffrey;Yeh, Harry
• 通讯作者: Yeh, Harry

Solitary waves perturbed by a broad sill. Part 2. Propagation along the sill

宽阔的窗台扰动着孤独的波浪。

• DOI: 10.1017/jfm.2019.873
• 发表时间: 2019-11-26
• 期刊: Journal of Fluid Mechanics
• 影响因子: 3.7
• 作者: H. Yeh;H. Ko;J. Knowles;S. Harry
• 通讯作者: S. Harry

Long-wave response to laterally periodic reef-lagoon bathymetry

对横向周期性礁湖测深的长波响应

• DOI: 10.1016/j.coastaleng.2022.104218
• 发表时间: 2022-12
• 期刊: Coastal Engineering
• 影响因子: 4.4
• 作者: Bheeroo, Vivek A.;Yeh, Harry
• 通讯作者: Yeh, Harry

Solitary waves perturbed by a broad sill. Part 1. Propagation across the sill

宽阔的窗台扰动着孤独的波浪。

• DOI: 10.1017/jfm.2019.712
• 发表时间: 2019-12
• 期刊: Journal of Fluid Mechanics
• 影响因子: 3.7
• 作者: Ko, Harrison T.;Yeh, Harry
• 通讯作者: Yeh, Harry

Standing longwave formations in reef-lagoon bathymetries

礁湖测深中的直立长波地层

• DOI: 10.1016/j.coastaleng.2021.103949
• 发表时间: 2021-09-01
• 期刊: Coastal Engineering
• 影响因子: 4.4
• 作者: Vivek A. Bheeroo;H. Yeh
• 通讯作者: H. Yeh