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题名: Effect of rainfall on a colluvial landslide in a debris flow valley
作者: Qiao, L; Meng, XM; Chen, G; Zhang, Y; Guo, P; Zeng, RQ; Li, YJ
收录类别: SCIE ; CSCD
出版日期: 2017-06
刊名: JOURNAL OF MOUNTAIN SCIENCE
卷号: 14, 期号:6, 页码:1113-1123
出版者: SCIENCE CHINA PRESS
出版地: BEIJING
英文摘要: A 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 centralupper part (0 similar to 41 m) of the landslide was greater than in the central-front part (41 similar to 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.
关键词: Colluvial landslide ; Debris flow ; Rainfall ; Electrical resistivity tomography ; Terrestrial laser scanning ; Electrical resistivity tomography
作者部门: [Qiao, Liang ; Meng, Xing-min ; Chen, Guan ; Zhang, Yi ; Guo, Peng ; Zeng, Run-qiang] Lanzhou Univ, Key Lab Western Chinas Environm Syst, Minist Educ, Lanzhou 730000, Peoples R China ; [Li, Ya-jun] Royal Holloway Univ London, Dept Geog, Surrey TW20 0EX, England
通讯作者: Meng, XM (reprint author), Lanzhou Univ, Key Lab Western Chinas Environm Syst, Minist Educ, Lanzhou 730000, Peoples R China.
学科分类: Environmental Sciences & Ecology
文章类型: Article
所属项目编号: International S&T Cooperation Program of China (ISTCP) [2013DFE23030] ; Fundamental Research Funds for the Central Universities [lzujbky-2014-273, lzujbky-2015-133]
所属项目名称: 国家国际科技合作专项 ; 中央高校基本科研业务费专项资金
项目资助者: MOST ; LZU
语种: 英语
DOI: 10.1007/s11629-016-4142-9
ISSN号: 1672-6316
WOS记录号: WOS:000403677100009
CSCD记录号: CSCD:5998098
IR记录号: WOS:000403677100009
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/189878
Appears in Collections:资源环境学院_期刊论文

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Recommended Citation:
Qiao, L,Meng, XM,Chen, G,et al. Effect of rainfall on a colluvial landslide in a debris flow valley[J]. JOURNAL OF MOUNTAIN SCIENCE,2017,14(6):1113-1123.
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