Collaborative Research: Initial Wave Characteristics from Deformable Submarine Landslides

合作研究：可变形海底滑坡的初波特征

• 批准号: 1201390
• 负责人: Robert Weiss
• 金额: $ 6.78万
• 依托单位: Virginia Polytechnic Institute and State University
• 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: 2011-08-01 至 2013-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1201390&HistoricalAwards=false
• 关键词: Collaborative; Research; Initial; Wave; Characteristics

Understanding the entire range of coastal hazards is becoming increasingly necessary as populations shift towards nearshore areas. Coastal hazards typically cause flooding and predicting the maximum penetration of the water inland is important in efforts to reduce the coastal destruction and save lives. Flooding from tsunamis generated from earthquakes is far better understood than tsunamis that are generated by submarine ground movements that resemble underwater avalanches. While there have been some attempts to estimate the initial waves caused by submarine slides, predictions vary over a wide range for the same slide conditions, and it is very difficult to meaningfully evaluating the hazard.This research aims at the derivation of empirical formulae that more reliably allow for prediction of initial waves from submarine mass movements. We will use the state-of-the-art hydrocode iSALE which incorporates most essential physical processes to jointly simulate the movement of the slide masses and the generation of the surface waves. The sliding mass is represented as a deformable material and moves freely under the influence of gravity. No external forcing is needed. In this way, not only we can simulate slides that were studied in laboratory experiments, but also able to investigate slides on realistic scales employing realistic geo- materials. We will also develop a graphic tool to allow easy visualization of the landslide motion and the ocean or lake waves that are generated.

随着人口向近海地区的转移，了解整个沿海危害的范围变得越来越必要。 沿海危害通常会导致洪水并预测内陆水的最大渗透对于减少沿海破坏并挽救生命的努力很重要。 与类似于水下雪崩的海底地面运动所产生的海啸相比，从地震产生的海啸洪水泛滥。 尽管有一些尝试估算海底幻灯片引起的初始波动的尝试，但预测在相同幻灯片条件下在较大范围内有所不同，并且很难有意义地评估危害。这项研究的目的是衍生出更多的经验公式。可靠地可以预测海底质量运动的初始波。 我们将使用最先进的液头iSale，该液体底漆结合了最重要的物理过程，以共同模拟幻灯片质量的运动和表面波的产生。 滑动质量表示为可变形物质，并在重力的影响下自由移动。 不需要外部强迫。 这样，我们不仅可以模拟在实验室实验中研究的幻灯片，而且还可以研究采用现实的地理材料的现实尺度上的幻灯片。 我们还将开发一个图形工具，以便容易地可视化滑坡运动以及生成的海洋或湖泊波。