The 2007 Fox Creek landslide, Peace River Lowland, Alberta, Canada

被引:6
作者
Kim, Tai Hoon [1 ]
Cruden, David M. [1 ]
Martin, C. Derek [1 ]
Froese, Corey R. [2 ]
机构
[1] Univ Alberta, Dept Civil & Environm Engn, Edmonton, AB T6G 2W2, Canada
[2] Alberta Geol Survey, Energy Resources Conservat Board, Edmonton, AB T6B 2X3, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
Landslide; Landslide dam; Preglacial valley; Peace River Lowland; Alberta; DAM;
D O I
10.1007/s10346-009-0184-1
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
Fox Creek is a small tributary of the Saddle River, a tributary of the Peace River in northwestern Alberta. It has several dormant landslides with degraded scarps and grabens. A new, reactivated landslide on the north bank of the Fox Creek occurred on 5 May 2007. The landslide formed two major sliding blocks. A rapid translational block slide, it mobilized 47 Mm(3) of displaced materials, blocked the creek, and made a natural dam with a maximum height of 19 m at the tips of the displaced blocks. The rupture surfaces of the 2007 landslide were within the advance phase glaciolacustrine sediments. The residual friction angles are about 10A degrees similar to those of the previous landslides in the Peace River Lowland. Precipitation and snow melt prior to the landslide are likely triggers of the 2007 Fox Creek landslide. The farmlands on the crest of the river valley and timber resources were impacted. The current landslide dam in Fox Creek does not have any evidence of seepage downstream; it may last for many years. Eventually, the creek will overtop and erode the dam. The same cycle of actions, landsliding, damming, and erosion will continue in the foreseeable future.
引用
收藏
页码:89 / 98
页数:10
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