| DOI: | 10.1007/s11069-019-03813-y
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| 论文题名: | Variation patterns of landslide basal friction revealed from long-period seismic waveform inversion |
| 作者: | Yu D.; Huang X.; Li Z.
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| 刊名: | Natural Hazards
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| ISSN: | 0921030X
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| 出版年: | 2020
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| 卷: | 100, 期:1 | | 起始页码: | 313
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| 结束页码: | 327
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| 语种: | 英语
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| 中文关键词: | Basal friction
; Broadband seismic signals
; Dynamic processes
; Xiaoba landslide
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| 英文关键词: | catastrophic event
; data inversion
; friction
; hazard assessment
; landslide
; seismic survey
; slope failure
; waveform analysis
; China
; Guizhou
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| 英文摘要: | A catastrophic landslide struck the Xiaoba village in Fuquan, Guizhou, southwestern China at about 8:30 p.m. (Beijing Time, UTC + 8) on August 27, 2014. The landslide and induced impulse water waves destroyed two villages and killed 23 persons. By reprocessing seismic signals from a seismic network deployed in the surrounding area of the landslide, we recognized the event from low-frequency seismic signals and subsequently performed a long-period seismic waveform inversion to obtain its force–time history. The inversion results reveal that the maximum force for the landslide is 5 × 109 N, and the duration of the landslide is 38.4 s. The landslide reached its maximum velocity of 12.4 m/s at 13.2 s after its initiation, and the mass center plugged into the quarry at 24.2 s. Based on the inversion results, we estimated basal friction of the landslide. We found the friction coefficient rapidly reduces to a relatively steady-state value of ~ 0.4 at a steady-state distance of 35 m and subsequently reduces in a near-linear manner that satisfies the empirical formula μ= - 1.4 d+ 0.44 , where d is sliding distance in km. The reduction in friction revealed by the formula is compatible with the finding of previous studies for landslides of similar volume in landslide acceleration stage. However, our result does not make it possible for the friction coefficient to increase again in landslide deceleration stage that a velocity-dependent friction law would allow. The friction variation patterns can be used to constrain input parameters in numerical landslide simulation, which can predicate runout distance and deposit areas for massive landslides to carry out landslide hazard assessment. © 2019, The Author(s). |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/168831
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| Appears in Collections: | 气候变化与战略
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作者单位: | China Earthquake Networks Center, Beijing, 100045, China
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| Recommended Citation: | |
Yu D.,Huang X.,Li Z.. Variation patterns of landslide basal friction revealed from long-period seismic waveform inversion[J]. Natural Hazards,2020-01-01,100(1)
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