Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019GL082351 |
Coulomb Mechanics and Relief Constraints Explain Landslide Size Distribution | |
Jeandet, L.; Steer, P.; Lague, D.; Davy, P. | |
2019-04-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:8页码:4258-4266 |
文章类型 | Article |
语种 | 英语 |
国家 | France |
英文摘要 | Despite the idea that topography could control landslide size scaling law, the contribution of landscape geometry to landslide size distribution remains elusive. We define a simple mechanical model accounting for the complexity and variability of natural hillslopes to infer the landslide depth probability density function (PDF) in a given landscape and upscale it to landslide area PDF. This model is based on both a Mohr-Coulomb stability analysis, accounting for cohesion and friction, and a criterion of intersection between rupture planes and the topographic surface. It can reproduce the distribution of observed landslide areas triggered by several past events. We found the ranges of effective cohesion (10-35 kPa) and friction (20-45 degrees) consistent with previous estimates of large-scale rock strength. Using synthetic topographies, we found that the finite geometry of hillslopes (length, steepness, and concavity) exerts a first-order control on the PDF of landslide areas, especially for large landslides. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000467949200022 |
WOS关键词 | 2008 WENCHUAN EARTHQUAKE ; MOUNTAIN BELT ; SLOPE-FAILURE ; TOPOGRAPHY ; EROSION ; MODEL ; SEDIMENT ; MOBILITY ; AREAS ; RATES |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/182509 |
专题 | 气候变化 |
作者单位 | Univ Rennes, CNRS, Geosci Rennes, UMR 6118, F-35000 Rennes, France |
推荐引用方式 GB/T 7714 | Jeandet, L.,Steer, P.,Lague, D.,et al. Coulomb Mechanics and Relief Constraints Explain Landslide Size Distribution[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(8):4258-4266. |
APA | Jeandet, L.,Steer, P.,Lague, D.,&Davy, P..(2019).Coulomb Mechanics and Relief Constraints Explain Landslide Size Distribution.GEOPHYSICAL RESEARCH LETTERS,46(8),4258-4266. |
MLA | Jeandet, L.,et al."Coulomb Mechanics and Relief Constraints Explain Landslide Size Distribution".GEOPHYSICAL RESEARCH LETTERS 46.8(2019):4258-4266. |
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