DOI: 10.1002/2016GL068378
论文题名: Historic drought puts the brakes on earthflows in Northern California
作者: Bennett G.L. ; Roering J.J. ; Mackey B.H. ; Handwerger A.L. ; Schmidt D.A. ; Guillod B.P.
刊名: Geophysical Research Letters
ISSN: 0094-8992
EISSN: 1944-8723
出版年: 2016
卷: 43, 期: 11 起始页码: 5725
结束页码: 5731
语种: 英语
英文关键词: aerial photograph
; drought
; earthflow
; landslide
; pixel tracking
; Worldview
Scopus关键词: Aerial photography
; Climate change
; Drought
; Moisture
; Photographic equipment
; Photography
; Pixels
; Sensitivity analysis
; Soil moisture
; Tracking (position)
; Aerial Photographs
; Earthflow
; Hydrologic interactions
; Landslide movements
; Palmer drought severity indices
; Satellite interferometry
; Velocity variations
; Worldview
; Landslides
英文摘要: California's ongoing, unprecedented drought is having profound impacts on the state's resources. Here we assess its impact on 98 deep-seated, slow-moving landslides in Northern California. We used aerial photograph analysis, satellite interferometry, and satellite pixel tracking to measure earthflow velocities spanning 1944–2015 and compared these trends with the Palmer Drought Severity Index, a proxy for soil moisture and pore pressure that governs landslide motion. We find that earthflow velocities reached a historical low in the 2012–2015 drought, but that their deceleration began at the turn of the century in response to a longer-term moisture deficit. Our analysis implies depth-dependent sensitivity of earthflows to climate forcing, with thicker earthflows reflecting longer-term climate trends and thinner earthflows exhibiting less systematic velocity variations. These findings have implications for mechanical-hydrologic interactions that link landslide movement with climate change as well as sediment delivery in the region. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84971607434&doi=10.1002%2f2016GL068378&partnerID=40&md5=ceb959424ffc1a86cf43538f673f0dd6
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9955
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Geological Sciences, University of Oregon, Eugene, OR, United States
Recommended Citation:
Bennett G.L.,Roering J.J.,Mackey B.H.,et al. Historic drought puts the brakes on earthflows in Northern California[J]. Geophysical Research Letters,2016-01-01,43(11).