Numerical Constraints on the Causes and Processes of Submarine Slope Failure along Active, Passive, and Volcanic Margins

主动、被动和火山边缘海底斜坡破坏原因和过程的数值约束

• 批准号: 0851525
• 负责人: Julia Morgan
• 金额: $ 13.88万
• 依托单位: William Marsh Rice University
• 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: 2009-08-01 至 2012-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0851525&HistoricalAwards=false
• 关键词: Numerical; Constraints; Causes; Processes; Submarine

The PIs will attempt to understand why submarine slopes fail where and when they do, through numerical modeling that will simulate the evolution of stresses and fluid pressures (and flow) in sedimentary buildups. They propose to use Discrete Element Methods (DEM) to model these processes, inputting laboratory and borehole constraints such as shear strength, internal friction, density and porosity and deriving internal friction, compressive and tensile shear strengths, and elastic modulii through modeling. The focus of the study research will be to attempt to understand the causes of failure in these environments, which is difficult to accomplish through direct observation. Broader impacts include graduate student training, support of underrepresented groups in the Earth Sciences, K-12 outreach, enhanced computational infrastructure, dissemination of results to the broader geohazards community, and the societal benefits of understanding the risk associated with submarine landslide hazards.

PI 将尝试通过模拟沉积物堆积过程中应力和流体压力（和流动）演变的数值模型，了解海底斜坡何时何地发生失效的原因。他们建议使用离散元方法（DEM）对这些过程进行建模，输入实验室和钻孔约束条件，例如剪切强度、内摩擦、密度和孔隙率，并通过建模导出内摩擦、压缩和拉伸剪切强度以及弹性模量。该研究的重点将是试图了解这些环境中故障的原因，这很难通过直接观察来完成。更广泛的影响包括研究生培训、对地球科学领域代表性不足群体的支持、K-12 推广、增强计算基础设施、向更广泛的地质灾害社区传播结果，以及了解与海底滑坡灾害相关风险的社会效益。