Collaborative Interdisciplinary Research-Initial Waves from Deformable Submarine Landslides

跨学科合作研究——可变形海底滑坡的初始波

• 批准号: 0928905
• 负责人: Costas Synolakis
• 金额: $ 16.66万
• 依托单位: University of Southern California
• 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 2013-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0928905&HistoricalAwards=false
• 关键词: Collaborative; Interdisciplinary; Research; Initial; Waves

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.

随着人口向近岸地区转移，了解沿海灾害的整个范围变得越来越必要。 沿海灾害通常会导致洪水，预测内陆水的最大渗透量是 这对减少沿海破坏和拯救生命的努力至关重要。 地震引发的海啸引发的洪水，远比类似于水下雪崩的海底地面运动引发的海啸更容易理解。 虽然已经有一些尝试来估计由海底滑坡引起的初始波，预测在一个很大的范围内相同的滑动条件，这是很难有意义的评估hazards.This研究的目的是在推导的经验公式，更可靠地允许预测的初始波从潜艇质量运动。 我们将使用最先进的Hydrocode iSALE，它结合了最基本的物理过程，以共同模拟滑体的运动和表面波的产生。 滑块被表示为可变形材料，并在重力的影响下自由移动。 不需要任何外部压力。 通过这种方式，我们不仅可以模拟在实验室实验中研究的幻灯片，而且还能够使用真实的地质材料在真实的尺度上研究幻灯片。 我们还将开发一个图形工具，使滑坡运动和产生的海洋或湖泊波浪的可视化。