IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2017  > Vol14 No.6
Effect of rainfall ona colluvial landslide in a debris flow valley
QIAO Liang; MENG Xing-min; CHEN Guan; ZHANG Yi; GUO Peng; ZENG Run-qiang; LI Ya-jun
Corresponding AuthorMENG Xing-min
2017-06
Source PublicationJournal of Mountain Science
ISSN1672-6316
Volume14Issue:6Pages:1113-1123
Subtype期刊论文
AbstractA colluvial landslide in a debris flow valley is a typical phenomena and is easily influenced by rainfall. The direct destructiveness of this kind of landslide is small, however, if failure occurs the resulting blocking of the channel may lead to a series of magnified secondary hazards. For this reason it is important to investigate the potential response of this type of landslide to rainfall. In the present paper, the Goulingping landslide, one of the colluvial landslides in the Goulingping valley in the middle of the Bailong River catchment in Gansu Province, China, was chosen for the study. Electrical Resistivity Tomography (ERT), Terrestrial Laser Scanning (TLS), together with traditional monitoring methods, were used to monitor changes in water content and the deformation of the landslide caused by rainfall. ERT was used to detect changes in soil water content induced by rainfall. The most significant findings were as follows:(1) the water content in the central-upper part (0~41 m) of the landslide was greater than in the central-front part (41~84 m)and (2) there was a relatively high resistivity zone at depth within the sliding zone. The deformation characteristics at the surface of the landslide were monitored by TLS and the results revealed that rainstorms caused three types of deformation and failure: (1) gully erosion at the slope surface; (2) shallow sliding failure; (3) and slope foot erosion. Subsequent monitoring of continuous changes in pore-water pressure, soil pressure and displacement (using traditional methods) indicated that long duration light rainfall (average 2.22 mm/d) caused the entire landslide to enter a state of creeping deformation at the beginning of the rainy season. Shear-induced dilation occurred for the fast sliding (30.09 mm/d) during the critical failure sub-phase (EF). Pore-water pressure in the sliding zone was affected by rainfall. In addition, the sliding L1 parts of the landslide exerted a discontinuous pressure on the L2 part. Through the monitoring and analysis, we conclude that this kind of landslide may have large deformation at the beginning and the late of the rainy season.
KeywordColluvial Landslide Debris Flow Rainfall Electrical Resistivity Tomography Terrestrial Laser Scanning Electrical Resistivity Tomography
DOI10.1007/s11629-016-4142-9
Indexed BySCI
Language英语
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18731
CollectionJournal of Mountain Science_Journal of Mountain Science-2017_Vol14 No.6
Recommended Citation
GB/T 7714
QIAO Liang,MENG Xing-min,CHEN Guan,et al. Effect of rainfall ona colluvial landslide in a debris flow valley[J]. Journal of Mountain Science,2017,14(6):1113-1123.
APA QIAO Liang.,MENG Xing-min.,CHEN Guan.,ZHANG Yi.,GUO Peng.,...&LI Ya-jun.(2017).Effect of rainfall ona colluvial landslide in a debris flow valley.Journal of Mountain Science,14(6),1113-1123.
MLA QIAO Liang,et al."Effect of rainfall ona colluvial landslide in a debris flow valley".Journal of Mountain Science 14.6(2017):1113-1123.
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