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摘要:
Two large landslides successively blocked the Jinsha River at the same location in Jiangda Village on October 10 and November 3,2018,respectively.The dynamic processes and possible interactions of the two landslides need to be studied to better understand the physical processes involved,and to provide information on future disaster mitigation.We investigated their force histories and sliding directions by inverting regional broadband seismograms.The scale of the October landslide was approximately three times that of the November event.The October event revealed a particularly strong deceleration force,which may have been caused by a collision between the sliding mass and ground surface.In contrast,the November event had a relatively weaker deceleration force,indicating that it may have been gradually stopped by the landslide dam formed during the October landslide.The sliding directions of the two landslides differed significantly in terms of both horizontal and vertical directions,indicating a change in their sliding surfaces.We conclude that unconsolidated materials at the top of the October landslide continued sliding along a curved slope during the November event.From our seismic models of dynamic processes,both the October landslide and local background may have affected and even changed a subsequent landslide's mechanism.
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篇名 Complex dynamics of repeating and river-blocking landslides in Jiangda during 2018
来源期刊 地震学报(英文版) 学科
关键词
年,卷(期) 2021,(1) 所属期刊栏目 Special Issue on Complicated Features on Seismic Sources and Deep Structures
研究方向 页码范围 3-14
页数 12页 分类号
字数 语种 英文
DOI 10.29382/eqs-2020-0034
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地震学报(英文版)
双月刊
1674-4519
11-5695/P
16开
北京民族学院南路5号(北京8116信箱)
1980
eng
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