Evaluating Regime Change of Sediment Transport in the Jingjiang River Reach, Yangtze River, China
文献类型：期刊论文
| 作者 | He, Li2; Chen, Dong2,3; Zhang, Shiyan2; Liu, Meng2,3; Duan, Guanglei1 |
| 刊名 | WATER
 |
| 出版日期 | 2018-03-01 |
| 卷号 | 10期号:3页码:21 |
| 关键词 | sediment regime suspended sediment concentration vertical profiles of concentration the Jingjiang River Reach the Yangtze River |
| ISSN号 | 2073-4441 |
| DOI | 10.3390/w10030329 |
| 通讯作者 | He, Li(heli@igsnrr.ac.cn) |
| 英文摘要 | The 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. |
| WOS关键词 | 3 GORGES DAM ; SUSPENDED SEDIMENT ; CONCENTRATION PROFILES ; VERTICAL-DISTRIBUTION ; SPANISH PYRENEES ; RATING CURVES ; UNSTEADY ; TURBULENCE ; CATCHMENT ; OPERATION |
| 资助项目 | National 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] |
| WOS研究方向 | Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000428516000094 |
| 出版者 | MDPI |
| 资助机构 | National Key R&D Program of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/54814]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | He, Li |
| 作者单位 | 1.Yangtze River Water Resources Commiss, Jingjiang Hydrol & Water Resources Surveying Bur, Wuhan 434020, Hubei, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China 3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：地理科学与资源研究所
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