Reshuffling of the sediment suspension regime in the starving middle Yangtze River downstream from cascade mega-reservoirs
文献类型：期刊论文
| 作者 | Guo, Anan; Chen, Dong; He, Li; Peng, Yuming; Duan, Guanglei |
| 刊名 | JOURNAL OF HYDROLOGY
 |
| 出版日期 | 2023-07-01 |
| 卷号 | 622页码:129694 |
| ISSN号 | 1879-2707 |
| 关键词 | Sediment suspension regime Cascade reservoirs Nonequilibrium Wash-load Jingjiang reach |
| DOI | 10.1016/j.jhydrol.2023.129694 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | The impoundment of cascade mega-reservoirs in the upper Yangtze River (uYR) has exerted profound and accumulative impacts on the lower reaches-not only a drastic drop in the incoming sediment load but also overturning of the runoff-sediment relationship. Based on a 1990-2021 dataset, we examined fundamental changes in the sediment suspension regime in the Jingjiang reach, approximately 100 km below the Three Gorges Dam (TGD). The cascade mega-reservoir impacts are elucidated by three parameters: inflow water discharge and sediment concentration released to the Three Gorges Reservoir (TGR) and operating water levels in front of the TGD. The wash-load concentrations in the reach in the post-TGR period illustrate strong relationships with the flow capacity index, they, however, were actually determined by the above three parameters. The relative importance of the three parameters in determining the wash-load concentrations was evaluated by a random forest model. After upstream reservoir impoundment starting in 2003, the unsaturation degrees in the reach tended to increase, and the thresholds distinguishing wash-load and bed-material-load have risen to -0.125 mm and -0.25 mm at SS/JL and ZC after TGD impoundment, respectively. In addition, the flow capacity coefficients, i.e., m and k, in the starving reach became significantly lower than their equilibrium counterparts. The study aims to facilitate effective management of the uYR cascade mega-reservoirs and the experience could be drawn on for other large rivers facing hydropower development. |
| 学科主题 | Engineering ; Geology ; Water Resources |
| WOS关键词 | 3 GORGES DAM ; SUSPENDED SEDIMENT ; ALLUVIAL RIVER ; BED-LOAD ; TRANSPORT ; PREDICTION ; IMPACTS ; MODEL |
| WOS研究方向 | Engineering ; Geology ; Water Resources |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/193862]  |
| 专题 | 陆地水循环及地表过程院重点实验室_外文论文 |
| 作者单位 | 1.University of Chinese Academy of Sciences, CAS 2.Chinese Academy of Sciences 3.Institute of Geographic Sciences & Natural Resources Research, CAS |
| 推荐引用方式 GB/T 7714 | Guo, Anan,Chen, Dong,He, Li,et al. Reshuffling of the sediment suspension regime in the starving middle Yangtze River downstream from cascade mega-reservoirs[J]. JOURNAL OF HYDROLOGY,2023,622:129694. |
| APA | Guo, Anan,Chen, Dong,He, Li,Peng, Yuming,&Duan, Guanglei.(2023).Reshuffling of the sediment suspension regime in the starving middle Yangtze River downstream from cascade mega-reservoirs.JOURNAL OF HYDROLOGY,622,129694. |
| MLA | Guo, Anan,et al."Reshuffling of the sediment suspension regime in the starving middle Yangtze River downstream from cascade mega-reservoirs".JOURNAL OF HYDROLOGY 622(2023):129694. |
入库方式： OAI收割
来源：地理科学与资源研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。