IMHE OpenIR  > 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-feng1,2; Li Yu1,2
Corresponding AuthorBAO Yu-hai
2016
Source PublicationJOURNAL OF MOUNTAIN SCIENCE
ISSN1672-6316
EISSN1993-0321
Volume13Issue:3Pages:508-521
SubtypeArticle
AbstractSoil 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.
KeywordBank Stabilization Root Area Ratio Root Tensile Strength Soil Reinforcement Riparian Zone Three Gorges Reservoir
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1007/s11629-014-3397-2
WOS Subject ExtendedEnvironmental Sciences & Ecology
Indexed BySCI
WOS KeywordLEVEL-FLUCTUATION ZONE ; SLOPE STABILITY ; TREE ROOTS ; TENSILE-STRENGTH ; STREAMBANK STABILITY ; ANTI-SCOURABILITY ; NITROGEN DYNAMICS ; CONCENTRATED FLOW ; SHEAR-STRENGTH ; LOESS PLATEAU
Language英语
Quartile4区
TOP
WOS SubjectEnvironmental Sciences
WOS IDWOS:000373020100012
Funding OrganizationNational Natural Science Foundation of China(41201272) ; Chinese Academy of Sciences Action-plan for West Development(KZCX2-XB3-09) ; Chinese Academy of Science (Light of West China Program)
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Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/14094
CollectionJournal of Mountain Science_Journal of Mountain Science-2016_Vol13 No.3
山地表生过程与生态调控重点实验室
Affiliation1.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
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
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.
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