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Evaluating Regime Change of Sediment Transport in the Jingjiang River Reach, Yangtze River, China
He, Li1; Chen, Dong1,2; Zhang, Shiyan1; Liu, Meng1,2; Duan, Guanglei3
2018-03-01
Source PublicationWATER
ISSN2073-4441
Volume10Issue:3Pages:21
Corresponding AuthorHe, Li(heli@igsnrr.ac.cn)
AbstractThe sediment regime in the Jingjiang river reach of the middle Yangtze River has been significantly changed from quasi-equilibrium to unsaturated since the impoundment of the Three Gorges Dam (TGD). Vertical profiles of suspended sediment concentration (SSC) and sediment flux can be adopted to evaluate the sediment regime at the local and reach scale, respectively. However, the connection between the vertical concentration profiles and the hydrologic conditions of the sub-saturated channel has rarely been examined based on field data. Thus, vertical concentration data at three hydrological stations in the reach (Zhicheng, Shashi, and Jianli) are collected. Analyses show that the near-bed concentration (within 10% of water depth from the riverbed) may reach up to 15 times that of the vertical average concentration. By comparing the fractions of the suspended sediment and bed material before and after TGD operation, the geomorphic condition under which the distinct large near-bed concentrations occur have been examined. Based on daily discharge-sediment hydrographs, the reach scale sediment regime and availability of sediment sources are analyzed. In total, remarkable large near-bed concentrations may respond to the combination of wide grading suspended particles and bed material. Finally, several future challenges caused by the anomalous vertical concentration profiles in the unsaturated reach are discussed. This indicates that more detailed measurements or new measuring technologies may help us to provide accurate measurements, while a fractional dispersion equation may help us in describing. The present study aims to gain new insights into regime change of sediment suspension in the river reaches downstream of a very large reservoir.
Keywordsediment regime suspended sediment concentration vertical profiles of concentration the Jingjiang River Reach the Yangtze River
DOI10.3390/w10030329
WOS Keyword3 GORGES DAM ; SUSPENDED SEDIMENT ; CONCENTRATION PROFILES ; VERTICAL-DISTRIBUTION ; SPANISH PYRENEES ; RATING CURVES ; UNSTEADY ; TURBULENCE ; CATCHMENT ; OPERATION
Indexed BySCI
Language英语
Funding ProjectNational Key R&D Program of China[2016YFC0402303] ; National Natural Science Foundation of China[51579230] ; National Natural Science Foundation of China[51779242] ; National Natural Science Foundation of China[51509234] ; National Natural Science Foundation of China[41330751] ; National Natural Science Foundation of China[51479179]
Funding OrganizationNational Key R&D Program of China ; National Natural Science Foundation of China
WOS Research AreaWater Resources
WOS SubjectWater Resources
WOS IDWOS:000428516000094
PublisherMDPI
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/54815
Collection中国科学院地理科学与资源研究所
Corresponding AuthorHe, Li
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
3.Yangtze River Water Resources Commiss, Jingjiang Hydrol & Water Resources Surveying Bur, Wuhan 434020, Hubei, Peoples R China
Recommended Citation
GB/T 7714
He, Li,Chen, Dong,Zhang, Shiyan,et al. Evaluating Regime Change of Sediment Transport in the Jingjiang River Reach, Yangtze River, China[J]. WATER,2018,10(3):21.
APA He, Li,Chen, Dong,Zhang, Shiyan,Liu, Meng,&Duan, Guanglei.(2018).Evaluating Regime Change of Sediment Transport in the Jingjiang River Reach, Yangtze River, China.WATER,10(3),21.
MLA He, Li,et al."Evaluating Regime Change of Sediment Transport in the Jingjiang River Reach, Yangtze River, China".WATER 10.3(2018):21.
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