Journal
LANDSLIDES
Volume 16, Issue 12, Pages 2433-2444Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s10346-019-01262-z
Keywords
Landslide; Yanyuan County; Rainfall; Characteristics; Failure mechanism
Funding
- Major Program of the National Natural Science Foundation of China [41790433]
- National Natural Science Foundation of China [41772312]
- NSFC-ICIMOD Collaborative Project [41661144041]
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This paper reports on a recent landslide event, which occurred in Yanyuan County at Xichang City, Sichuan Province, China, on 19 July 2018. Due to the continuous and heavy rainfall between 8 July 2018 and 18 July 2018, approximately 18 million m(3) of soil detached from an ancient landslide and buried 65 buildings, the entire sliding process lasted for severalminutes. Here, based on field investigations and unmanned aerial vehicle (UAV) photography, we describe the characteristics and failure mechanism of this landslide. The results showed that the landslide was triggered by the continuous and heavy rainfall. Additionally, during the first post-failure stage, the motion of this landslide involved typical successive movement, and over time, the style of movement progressively turned flow-like, which can be classified as debris slide by using the 1978 Varnes classification scheme. The landslide event described here is an outstanding case for landslide studies. In particular, this landslide represents a good illustration of the transform mechanism of landslide movement from sliding to flow-like.
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