IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2013  > Vol10 No.4
An Exploratory Analysis of Vegetation Strategies to Reduce Shallow Landslide Activity on Loess Hillslopes, Northeast Qinghai-Tibet Plateau, China
HU Xia-song; BRIERLEY Gary; ZHU Hai-li; LI Guo-rong; FU Jiang-tao; MAO Xiao-qing; YU Qin-qin; QIAO Na
Corresponding AuthorBRIERLEY Gary
2013-08
Source PublicationJournal of Mountain Science
Volume10Issue:4Pages:668-686
AbstractHeavy 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 root-soil 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.
KeywordArid Environments Shallow Landslide Vegetative Hillslope Protection Root-soil Composite Systems Tensile Strength Root Reinforcement
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/5672
CollectionJournal of Mountain Science_Journal of Mountain Science-2013_Vol10 No.4
Corresponding AuthorBRIERLEY Gary
Recommended Citation
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.
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