Main types of soil mass failure and characteristics of their impact factors in the Yuanmou Valley, China
文献类型： 外文期刊
作者： Chen, Anqiang 1 ; Zhang, Dan 2 ; Yan, Bangguo 3 ; Lei, Baokun 1 ; Liu, Gangcai 3 ;
作者机构： 1.Yunnan Acad Agr Sci, Inst Agr Environm & Resources, Kunming 650205, Peoples R China
2.Yunnan Agr Univ, Coll Resources & Environm, Kunming 650205, Peoples R China
3.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
4.Minist Water Resources, Chengdu 610041, Peoples R China
关键词： Gully erosion;Gully sidewall;Luvisols;Vertic soil material
期刊名称：CATENA （ 影响因子：5.198； 五年影响因子：5.594 ）
ISSN：
年卷期：
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收录情况： SCI
摘要： Gully erosion is a dominant process causing soil loss in the Yuanmou Valley of Yunnan Province, China. Soil mass failure is a common process involved in gully development. The development of the gully and the occurrence of mass failure are interdependent and mutually promotive, but mass failure types have not been very well understood. In this study we identify the main types of soil mass failure and the characteristics of their impact factors in the Yuanmou Valley. A detailed field survey was conducted in May 2010 in a representative area of the studied region, and selected soil parameters were measured in the field and laboratory. Results showed that there are four different soil mass failure types: falling, sliding, exfoliating, and toppling, each having unique characteristics of geology, topography, soil, and climate. Examination of these characteristics indicates that the occurrence of mass failure is controlled by four factors: 1) the typical geological structure of the Yuanmou Group represented by alternating layers of sand and clay; 2) the different terrain and landforms; 3) the different gully development stages; and 4) the particular soil properties under special weather conditions, including a dry-hot climate with distinct wet and dry seasons. (C) 2014 Elsevier B.V. All rights reserved.
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