Estimation of soil reinforcement by the roots of four post-dam prevailing grass species in the riparian zone of Three Gorges Reservoir, China

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2016 > Vol13 No.3

	Estimation of soil reinforcement by the roots of four post-dam prevailing grass species in the riparian zone of Three Gorges Reservoir, China
	Zhong Rong-hua1,2 ; He Xiu-bin1 ; Bao Yu-hai1 ; Tang Qiang3 ; Gao Jin-zhang1,2 ; Yan Dan-dan1,2 ; Wang Ming-feng 1,2; Li Yu1,2
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2016-03-01
卷号	13 期号:3 页码:508-521
关键词	Bank stabilization Root area ratio Root tensile strength Soil reinforcement Riparian zone Three Gorges Reservoir
ISSN号	1672-6316
通讯作者	BAO Yu-hai
英文摘要	Soil erosion and bank degradation is a major post-dam concern regarding the riparian zone of the Three Gorges Reservoir. The development and succession of vegetation is a main countermeasure, especially to enhance bank stability and mitigate soil erosion by the root system. In this study, the roots of four prevailing grass species, namely, Cynodon dactylon, Hemarthria altissima, Hemarthria compressa, and Paspalum paspaloides, in the riparian zone were investigated in relation to additional soil cohesion. Roots were sampled using a single root auger. Root length density (RLD) and root area ratio (RAR) were measured by using the WinRHIZO image analysis system. Root tensile strength (T-R) was performed using a manual dynamometer, and the soil reinforcement caused by the roots was estimated using the simple Wu's perpendicular model. Results showed that RLD values of the studied species ranged from 0.24 cm/cm(3) to 20.89 cm/cm(3) at different soil layers, and RLD were significantly greater at 0-10 cm depth in comparison to the deeper soil layers (> 10 cm). RAR measurements revealed that on average 0.21% of the reference soil area was occupied by grass roots for all the investigated species. The measured root tensile strength was the highest for P. paspaloides (62.26 MPa) followed by C. dactylon (51.49 MPa), H. compressa (50.66 MPa), and H. altissima (48.81 MPa). Nevertheless, the estimated maximum root reinforcement in this investigation was 22.5 kPa for H. altissima followed by H. compressa (21.1 kPa), P. paspaloides (19.5 kPa), and C. dactylon (15.4 kPa) at 0-5 cm depth soil layer. The root cohesion values estimated for all species were generally distributed at the 0-10 cm depth and decreased with the increment of soil depth. The higher root cohesion associated with H. altissima and H. compressa implies their suitability for revegetation purposes to strengthen the shallow soil in the riparian zone of the Three Gorges Reservoir. Although the soil reinforcement induced by roots is only assessed from indirect indicators, the present results still useful for species selection in the framework of implementing and future vegetation recovery actions in the riparian zone of the Three Gorges Reservoir and similar areas in the Yangtze River Basin.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Environmental Sciences
研究领域[WOS]	Environmental Sciences & Ecology
关键词[WOS]	LEVEL-FLUCTUATION ZONE ; SLOPE STABILITY ; TREE ROOTS ; TENSILE-STRENGTH ; STREAMBANK STABILITY ; ANTI-SCOURABILITY ; NITROGEN DYNAMICS ; CONCENTRATED FLOW ; SHEAR-STRENGTH ; LOESS PLATEAU
收录类别	SCI
语种	英语
WOS记录号	WOS:000373020100012
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/14094]
专题	成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2016_Vol13 No.3 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
作者单位	1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Ecoenvironm Sci Res Ctr, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China
推荐引用方式 GB/T 7714	Zhong Rong-hua,He Xiu-bin,Bao Yu-hai,et al. Estimation of soil reinforcement by the roots of four post-dam prevailing grass species in the riparian zone of Three Gorges Reservoir, China[J]. JOURNAL OF MOUNTAIN SCIENCE,2016,13(3):508-521.
APA	Zhong Rong-hua.,He Xiu-bin.,Bao Yu-hai.,Tang Qiang.,Gao Jin-zhang.,...&Li Yu.(2016).Estimation of soil reinforcement by the roots of four post-dam prevailing grass species in the riparian zone of Three Gorges Reservoir, China.JOURNAL OF MOUNTAIN SCIENCE,13(3),508-521.
MLA	Zhong Rong-hua,et al."Estimation of soil reinforcement by the roots of four post-dam prevailing grass species in the riparian zone of Three Gorges Reservoir, China".JOURNAL OF MOUNTAIN SCIENCE 13.3(2016):508-521.