Investigating Feedbacks Between Deformation and Groundwater Flow in a Slow Moving Landslide

GSTDTAP

项目编号	1658800
	Investigating Feedbacks Between Deformation and Groundwater Flow in a Slow Moving Landslide
	Noah Finnegan
主持机构	University of California-Santa Cruz
项目开始年	2017
	2017-02-15
项目结束日期	2020-01-31
资助机构	US-NSF
项目类别	Standard Grant
项目经费	333968(USD)
国家	美国
语种	英语
英文摘要	In the U.S., landslides annually claim 25-50 lives and cause $1.6-3.2 billion in damage. While some landslides fail catastrophically, others exhibit slow seasonal slip, often amounting to only centimeters to meters per year. What determines which of these two differing modes of behavior dominates remains a key problem in landslide mechanics and natural hazard prediction. This project will investigate the physical processes that are thought to govern slow slip in landslides. Specifically, this project will test two hypotheses for feedbacks between landslide deformation and groundwater flow at a large, active, slow-moving landslide (Oak Ridge earthflow) near San Jose, CA. The first hypothesis argues that sliding along a landslide's margins causes changes in permeability that will lead both to retention of water and to patterns of groundwater flow that will encourage future failure in one location. The second hypothesis argues that sliding induces expansion of soil pore spaces in slow moving landslides, which reduces water pressure inside the slide and hence stabilizes basal sliding. Both of these hypotheses suggest feedbacks on sliding that are fundamental to the process of landslide failure. Although each hypothesis rests on a sound physical and experimental basis, only very limited field data exist to test each.
来源学科分类	Geosciences - Earth Sciences
文献类型	项目
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/70797
专题	环境与发展全球科技态势
推荐引用方式 GB/T 7714	Noah Finnegan.Investigating Feedbacks Between Deformation and Groundwater Flow in a Slow Moving Landslide.2017.