An exploratory analysis of vegetation strategies to reduce shallow landslide activity on loess hillslopes, Northeast Qinghai-Tibet Plateau, China

ISL OpenIR > 青海盐湖研究所知识仓储

	An exploratory analysis of vegetation strategies to reduce shallow landslide activity on loess hillslopes, Northeast Qinghai-Tibet Plateau, China
	Hu Xia-song 1,2; Brierley, Gary 3; Zhu Hai-li 1; Li Guo-rong 1; Fu Jiang-tao 2; Mao Xiao-qing 1; Yu Qin-qin 1; Qiao Na 1
	2013-08-01
发表期刊	JOURNAL OF MOUNTAIN SCIENCE
卷号	10 期号:4 页码:668-686
关键词	Arid Environments Shallow Landslide Vegetative Hillslope Protection Root-soil Composite Systems Tensile Strength Root Reinforcement
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.
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/4473
专题	青海盐湖研究所知识仓储中国科学院青海盐湖研究所
作者单位	1.Qinghai Univ, Dept Geol Engn, Xining 810016, Qinghai, Peoples R China 2.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Qinghai, Peoples R China 3.Univ Auckland, Sch Environm, Auckland 1142, New Zealand
推荐引用方式 GB/T 7714	Hu Xia-song,Brierley, Gary,Zhu Hai-li,et al. An exploratory analysis of vegetation strategies to reduce shallow landslide activity on loess hillslopes, Northeast Qinghai-Tibet Plateau, China[J]. JOURNAL OF MOUNTAIN SCIENCE,2013,10(4):668-686.
APA	Hu Xia-song.,Brierley, Gary.,Zhu Hai-li.,Li Guo-rong.,Fu Jiang-tao.,...&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 Xia-song,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.