Sediment dynamics of an allogenic river channel in a very arid environment

doi:10.1002/hyp.11171

	Sediment dynamics of an allogenic river channel in a very arid environment
	Yu, Guo-An 1,2; Li, Zhiwei 3,4; Disse, Markus 2; Huang, He Qing 1
刊名	HYDROLOGICAL PROCESSES
	2017-05-30
卷号	31 期号:11 页码:2050-2061
关键词	allogenic and perennial river effective discharge hysteresis effects sediment dynamics Tarim River
ISSN号	0885-6087
DOI	10.1002/hyp.11171
通讯作者	Li, Zhiwei(lzhiwei2009@163.com)
英文摘要	Despite a growing interest in the sediment dynamics of dryland rivers, most research has been based on ephemeral streams in endogenic hydrological systems (runoff and sediment transport determined by local precipitation). Less attention, however, has been paid to allogenic and perennial dryland rivers. Here, we report a case study on the suspended sediment dynamics of the Tarim River, an allogenic and perennial river flowing in a very arid environment in China, based on mean daily discharge and mean daily suspended sediment concentration (SSC) over the last 5 decades (1960-2011). Results reveal that discharge and SSCs are predominantly low and have distributions with large positive skewness. The SSC-discharge relationships can be fairly well generalized by power functions, with quite large scatter at extreme (low and high) flow conditions. Marked temporal and spatial variations were observed in the effective discharge for sediment transport. The frequency of the effective discharge ranged from 0.5% to 2% (or an average flow duration of 2-7 days/year), implying that moderate to high flows play an important role in sediment transport. The sediment rating curves show strong hysteresis effects, with 3 types of hysteresis loops observed, clockwise (the most predominant), anticlockwise, and figure of eight. The high potential for bank collapse near the peak and falling limb of the flood hydrograph is the major cause of anticlockwise and figure-of-eight hysteresis loops.
资助项目	Alexander von Humboldt Foundation ; National Natural Science Foundation of China (NSFC)[41571009] ; National Natural Science Foundation of China (NSFC)[41330751] ; National Natural Science Foundation of China (NSFC)[91547112] ; National Natural Science Foundation of China (NSFC)[91647204] ; State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University[2017-KF-01]
WOS关键词	SUSPENDED-SEDIMENT ; EFFECTIVE DISCHARGE ; TARIM RIVER ; FREQUENCY-ANALYSIS ; NORTHERN NEGEV ; LOESS PLATEAU ; FLASH FLOODS ; TRANSPORT ; BASIN ; CHINA
WOS研究方向	Water Resources
语种	英语
出版者	WILEY
WOS记录号	WOS:000402884100006
资助机构	Alexander von Humboldt Foundation ; National Natural Science Foundation of China (NSFC) ; State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/63555]
专题	中国科学院地理科学与资源研究所
通讯作者	Li, Zhiwei
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, 11A Datun Rd, Beijing 100101, Peoples R China 2.Tech Univ Munich, Arcisstr 21, D-80333 Munich, Germany 3.Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha 410114, Hunan, Peoples R China 4.Qinghai Univ, State Key Lab Plateau Ecol & Agr, Xining 810016, Peoples R China
推荐引用方式 GB/T 7714	Yu, Guo-An,Li, Zhiwei,Disse, Markus,et al. Sediment dynamics of an allogenic river channel in a very arid environment[J]. HYDROLOGICAL PROCESSES,2017,31(11):2050-2061.
APA	Yu, Guo-An,Li, Zhiwei,Disse, Markus,&Huang, He Qing.(2017).Sediment dynamics of an allogenic river channel in a very arid environment.HYDROLOGICAL PROCESSES,31(11),2050-2061.
MLA	Yu, Guo-An,et al."Sediment dynamics of an allogenic river channel in a very arid environment".HYDROLOGICAL PROCESSES 31.11(2017):2050-2061.