DOI: 10.1038/s41561-021-00739-8
论文题名: Topographic stress control on bedrock landslide size
作者: Li G.K. ; Moon S.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2021
卷: 14, 期: 5 起始页码: 307
结束页码: 313
语种: 英语
英文关键词: bedrock
; carbon cycle
; chemical weathering
; groundwater flow
; landscape evolution
; topographic effect
英文摘要: Landslides are a major natural hazard and act as a primary driver of erosion, chemical weathering and organic carbon transfer in mountain ranges. Evaluating the impact of landslides on Earth systems requires knowledge about the controls on their size, which are not well understood. Here we show that topographic stress, resulting from the interaction between tectonic stress and topography, influences bedrock landslide size at landscape scales by modulating the subsurface material strength through fracturing and weathering. Using a three-dimensional topographic stress model, we characterize the spatial pattern of subsurface open-fracture zones in a crystalline-rock terrain of the eastern Tibetan mountains. Then, we compare the predicted open-fracture zones with 982 mapped bedrock landslides. The results show that areas with deeper subsurface open-fracture zones tend to accommodate larger landslides. This is probably due to the influences of topographically induced fractures on the material strength and groundwater flow paths and rates. We conclude that the extent of hillslope failure depends on both distant tectonic forces and local topography, which has implications for hazard mitigation, landscape evolution and the global carbon cycle. © 2021, The Author(s), under exclusive licence to Springer Nature Limited. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169780
Appears in Collections: 气候变化与战略
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作者单位: Department of Earth, Planetary, and Space Sciences, University of California Los Angeles, Los Angeles, CA, United States; Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, United States
Recommended Citation:
Li G.K.,Moon S.. Topographic stress control on bedrock landslide size[J]. Nature Geoscience,2021-01-01,14(5)