globalchange  > 气候变化与战略
DOI: 10.1007/s11069-021-04803-9
论文题名:
New insights into the delayed initiation of a debris flow in southwest China
作者: Peng T.; Chen N.; Hu G.; Tian S.; Han Z.; Liu E.
刊名: Natural Hazards
ISSN: 0921030X
出版年: 2021
卷: 108, 期:3
起始页码: 2855
结束页码: 2877
语种: 英语
中文关键词: Delayed debris flow ; Fluid–solid coupling ; Hollow deposits ; Landslide initiation
英文摘要: On 6 July 2020, 3 h 40 min after rainfall stopped, a delayed debris-flow disaster occurred due to colluvium deposits in a hollow region (CDH) in the Chenghuangmiao Gully, Sichuan Province, China, resulting in 4 deaths and 27 injuries. This study explores the initiation process of the delayed debris flow and the cause for the delay. Field investigations, catchment geometry interpretation, laboratory tests, theoretical calculations, and fluid–solid coupling numerical simulation were performed to obtain landslide parameters and understand the mechanisms of the event. Results show that (1) the event was a giant low-frequency viscous debris flow. (2) It was initiated by the delayed landslide process under the influence of back-end confluence. (3) The debris-flow discharge in the main gully increased over 19.5 min. (4) The seepage process inside the CDH continued for 3 h 20 min after the rainfall stopped before the pore pressure and reduction in strength were sufficient to initiate the debris flow. This research provides new insights on delayed debris-flow disasters and can be a reference for improving disaster management systems, especially monitoring and early warning systems, thereby avoiding future casualties. © 2021, The Author(s), under exclusive licence to Springer Nature B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169289
Appears in Collections:气候变化与战略

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作者单位: Key Lab of Mountain Hazards and Surface Process, Institute of Mountain Hazards and Environment (IMHE), Chinese Academy of Sciences (CAS), Chengdu, 610041, China; University of Chinese Academy of Sciences (UCAS), Beijing, 100049, China; Academy of Plateau Science and Sustainability, Xining, 810016, China; School of Civil Engineering, Central South University, Changsha, 410075, China; State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resources and Hydropower, Sichuan University, Chengdu, 610065, China

Recommended Citation:
Peng T.,Chen N.,Hu G.,et al. New insights into the delayed initiation of a debris flow in southwest China[J]. Natural Hazards,2021-01-01,108(3)
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