干旱区生态环境知识资源中心(Arid): Effects of riparian plant roots on the unconsolidated bank stability of meandering channels in the Tarim River, China

Arid

DOI	10.1016/j.geomorph.2019.106958
	Effects of riparian plant roots on the unconsolidated bank stability of meandering channels in the Tarim River, China
	Yu, Guo-An 1; Li, Zhiwei 2,3; Yang, Hanyuan 2; Lu, Jianying 1,4; Huang, He Qing 1; Yi, Yujun 5
通讯作者	Li, Zhiwei
来源期刊	GEOMORPHOLOGY
ISSN	0169-555X
EISSN	1872-695X
出版年	2020
卷号	351
英文摘要	Meandering channels with highly sinuous and distorted bends have developed along the middle and lower reaches of the Tarim River in northwestern China. Riverbanks composed of unconsolidated materials have much lower bank strengths and are susceptible to fluvial erosion and bank collapse, particularly under high flow conditions. Thus, the formation and development of meander bends in such environments appear unintuitive. It is logical to speculate that riparian plant roots in unconsolidated banks have significant effects on bank stability and bend development in the absence of cohesive sediments, but this has not been verified. To determine the influence of root cohesion on the bank stability of meandering channels in the Tarim River, in situ measurements and sampling of roots from locally dominant riparian vegetation, i.e., Populus euphratica (PE), Tamarix ramosissima (TR), and Phragmites australis (PA), were conducted on the meandering bends to obtain root parameters, induding diameter and root area ratio. The radius of curvature of local bends corresponding to sampling sites was also calculated using remote sensing imagery. We used the Bank Stability and Toe Erosion Model (BSTEM) to quantitatively estimate the effects of different root conditions on channel bank strength. The results confirmed that roots (and sand-root composites) provide effective reinforcement to unconsolidated banks, control the bank erosion, and hence enhance bank stability. However, the effects were highly variable under different root conditions. PA roots generally improved bank strength more than those of PE or TR, with PA, PE, and TR improving bank strength by 88.2%, 73.2%, and 63.6%, respectively. Riparian vegetation in this extremely arid and unconsolidated sediment environment therefore appears to be a prerequisite for sustaining the meandering channel. (C) 2019 Elsevier B.V. All rights reserved.
英文关键词	Meandering channel Riparian vegetation Sand-root composite Bank collapse
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000514254300005
WOS关键词	TREE ROOTS ; COMPOSITE RIVERBANK ; SPATIAL VARIABILITY ; FLUVIAL LANDFORMS ; TENSILE-STRENGTH ; JINGJIANG REACH ; VEGETATION ; REINFORCEMENT ; MIGRATION ; CUTOFF
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
来源机构	中国科学院地理科学与资源研究所 ; 北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314610
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China; 2.Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Peoples R China; 3.Changsha Univ Sci & Technol, Key Lab Water Sediment Sci & Water Disaster Preve, Changsha 410114, Peoples R China; 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 5.Beijing Normal Univ, Sch Environm, State Key Lab Water Environm Simulat & Pollut Con, Beijing 100875, Peoples R China
推荐引用方式 GB/T 7714	Yu, Guo-An,Li, Zhiwei,Yang, Hanyuan,et al. Effects of riparian plant roots on the unconsolidated bank stability of meandering channels in the Tarim River, China[J]. 中国科学院地理科学与资源研究所, 北京师范大学,2020,351.
APA	Yu, Guo-An,Li, Zhiwei,Yang, Hanyuan,Lu, Jianying,Huang, He Qing,&Yi, Yujun.(2020).Effects of riparian plant roots on the unconsolidated bank stability of meandering channels in the Tarim River, China.GEOMORPHOLOGY,351.
MLA	Yu, Guo-An,et al."Effects of riparian plant roots on the unconsolidated bank stability of meandering channels in the Tarim River, China".GEOMORPHOLOGY 351(2020).