DOI: 10.1002/2017JF004594
Scopus记录号: 2-s2.0-85045962606
论文题名: InSAR Measurements and Viscoelastic Modeling of Sinkhole Precursory Subsidence: Implications for Sinkhole Formation, Early Warning, and Sediment Properties
作者: Baer G. ; Magen Y. ; Nof R.N. ; Raz E. ; Lyakhovsky V. ; Shalev E.
刊名: Journal of Geophysical Research: Earth Surface
ISSN: 21699003
出版年: 2018
卷: 123, 期: 4 起始页码: 678
结束页码: 693
语种: 英语
英文关键词: Dead Sea
; InSAR
; land subsidence
; sediment viscosity
; sinkholes
; viscoelastic modeling
Scopus关键词: numerical model
; sediment property
; sinkhole
; subsidence
; synthetic aperture radar
; viscoelasticity
; viscosity
; Dead Sea
; Israel
; Jordan
英文摘要: During the past three decades, thousands of sinkholes were formed along the Dead Sea (DS) shorelines in Israel and Jordan, due to dissolution of subsurface salt by undersaturated groundwater. The sinkholes are associated with gradual subsidence preceding their collapse by periods ranging from a few days to almost 5 years. To determine the factors controlling this precursory subsidence, we examine tens of subsidence-sinkhole sequences along the DS shorelines in Israel. The duration and magnitude of the precursory subsidence are determined by Interferometric Synthetic Aperture Radar (InSAR) measurements and simulated by viscoelastic damage rheology models. Longer periods of precursory subsidence are found in the cemented alluvial fans and in simulations of higher-viscosity sediments. While surface subsidence accelerates during the precursory period, the widths of the subsiding areas remain uniform, suggesting that during this period upward propagation of damage from the subsurface cavity is not accompanied by upward migration of the actual cavity. Our observations and simulations are used to constrain the viscosity of the sediments along the DS and to reduce sinkhole hazards by assessing the precursory times of future sinkholes in the different sedimentary environments. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114132
Appears in Collections: 气候减缓与适应
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作者单位: Geological Survey of Israel, Jerusalem, Israel; The Dead Sea and Arava Science Center, Tamar Regional Council, Israel
Recommended Citation:
Baer G.,Magen Y.,Nof R.N.,et al. InSAR Measurements and Viscoelastic Modeling of Sinkhole Precursory Subsidence: Implications for Sinkhole Formation, Early Warning, and Sediment Properties[J]. Journal of Geophysical Research: Earth Surface,2018-01-01,123(4)