干旱区生态环境知识资源中心(Arid): An exploratory analysis of vegetation strategies to reduce shallow landslide activity on loess hillslopes, Northeast Qinghai-Tibet Plateau, China

Arid

	An exploratory analysis of vegetation strategies to reduce shallow landslide activity on loess hillslopes, Northeast Qinghai-Tibet Plateau, China
	Hu Xiasong; Brierley Gary; Zhu Haili; Li Guorong; Fu Jiangtao; Mao Xiaoqing; Yu Qinqin; Qiao Na
来源期刊	Journal of Mountain Science
ISSN	1672-6316
出版年	2013
卷号	10 期号:4 页码:668-686
英文摘要	Heavy summer rainfall induces significant soil erosion and shallow landslide activity on the loess hillslopes of the Xining Basin at the northeast margin of the Qinghai-Tibet Plateau. This study examines the mechanical effects of five native shrubs that can be used to reduce shallow landslide activity. We measured single root tensile resistance and shear resistance, root anatomical structure and direct shear and triaxial shear for soil without roots and five rootsoil composite systems. Results show that Atriplex canescens (Pursh) Nutt. possessed the strongest roots, followed by Caragana korshinskii Kom., Zygophyllum xanthoxylon (Bunge) Maxim., Nitraria tangutorum Bobr. and Lycium chinense Mill. Single root strength and shear resistance relationships with root diameter are characterized by power or exponential relations, consistent with the Mohr-Coulomb law. Root mechanical strength reflects their anatomical structure, especially the percentage of phloem and xylem cells, and the degree and speed of periderm lignifications. The cohesion force of root-soil composite systems is notably higher than that of soil without roots, with increasing amplitudes of cohesion force for A. canescens, C. korshinskii, Z. xanthoxylon, N. tangutorum and L. chinense of 75.9%, 75.1%, 36.2%, 24.6% and 17.0 % respectively. When subjected to shear forces, the soil without root samples show much greater lateral deformation than the root-soil composite systems, reflecting the restraining effects of roots. Findings from this paper indicate that efforts to reduce shallow landslides in this region by enhancing root reinforcement will be achieved most effectively using A. canescens and C. korshinskii.
英文关键词	Arid environments Shallow landslide Vegetative hillslope protection Root-soil composite systems Tensile strength Root reinforcement
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:4921734
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335259
作者单位	Hu Xiasong, Department of Geological Engineering, Qinghai University, Xining, Qinghai 810016, China.; Zhu Haili, Department of Geological Engineering, Qinghai University, Xining, Qinghai 810016, China.; Li Guorong, Department of Geological Engineering, Qinghai University, Xining, Qinghai 810016, China.; Mao Xiaoqing, Department of Geological Engineering, Qinghai University, Xining, Qinghai 810016, China.; Yu Qinqin, Department of Geological Engineering, Qinghai University, Xining, Qinghai 810016, China.; Qiao Na, Department of Geological Engineering, Qinghai University, Xining, Qinghai 810016, China.; Brierley Gary, School of Environment, University of Auckland, Auckland, 1142, New Zealand.; Fu Jiangtao, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, Qinghai 810008, China.
推荐引用方式 GB/T 7714	Hu Xiasong,Brierley Gary,Zhu Haili,et al. An exploratory analysis of vegetation strategies to reduce shallow landslide activity on loess hillslopes, Northeast Qinghai-Tibet Plateau, China[J],2013,10(4):668-686.
APA	Hu Xiasong.,Brierley Gary.,Zhu Haili.,Li Guorong.,Fu Jiangtao.,...&Qiao Na.(2013).An exploratory analysis of vegetation strategies to reduce shallow landslide activity on loess hillslopes, Northeast Qinghai-Tibet Plateau, China.Journal of Mountain Science,10(4),668-686.
MLA	Hu Xiasong,et al."An exploratory analysis of vegetation strategies to reduce shallow landslide activity on loess hillslopes, Northeast Qinghai-Tibet Plateau, China".Journal of Mountain Science 10.4(2013):668-686.