| 梯级水库蓄水对三峡水库洪峰沙峰异步特性的影响 |
| |
| 引用本文： | 张为,李昕,任金秋,董炳江.梯级水库蓄水对三峡水库洪峰沙峰异步特性的影响[J].水科学进展,2020,31(4):481-490. |
| |
| 作者姓名： | 张为 李昕 任金秋 董炳江 |
| |
| 作者单位： | 武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072;长江水利委员会水文局,湖北武汉430010 |
| |
| 基金项目： | 国家重点研发计划资助项目2017YFC0405202 |
| |
| 摘 要： | 梯级水库蓄水后,三峡水库入库泥沙大幅度减少,同时三峡水库洪峰沙峰传播特性发生变化,有必要研究新水沙条件下三峡水库洪峰沙峰异步特性变化及其原因,为深入认识水库洪峰沙峰异步特性机理和精细化减淤调度方式提供理论基础。采用实测资料分析法和理论分析法,以2003-2018年三峡水库实测水文资料为基础,对梯级水库蓄水后三峡水库洪峰沙峰异步特性变化进行分析,初步探讨这些变化的主要原因。结果表明:梯级水库蓄水后,三峡水库洪峰沙峰异步现象加剧,表现为入库滞后沙峰比例增加最多、库区洪峰传播时间减少以及沙峰传播时间增加。造成该现象的原因是入库泥沙来源发生变化、入库洪峰流量减少以及入库泥沙颗粒粗化。
|
| 关 键 词： | 梯级水库 洪峰 沙峰 传播特性 异步 三峡水库 |
| 收稿时间： | 2019-10-14 |
Influence of the impoundment of cascade reservoirs on the asynchronies of flood peak and sediment peak in the Three Gorges Reservoir |
| |
| ZHANG Wei,LI Xin,REN Jinqiu,DONG Bingjiang.Influence of the impoundment of cascade reservoirs on the asynchronies of flood peak and sediment peak in the Three Gorges Reservoir[J].Advances in Water Science,2020,31(4):481-490. |
| |
| Authors: | ZHANG Wei LI Xin REN Jinqiu DONG Bingjiang |
| |
| Affiliation: | 1.State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China2.Bureau of hydrology, Changjiang River Water Resources Commission, Wuhan 430010, China |
| |
| Abstract: | After impoundment of the cascade reservoirs, the incoming suspended sediment in the Three Gorges Reservoir (TGR) greatly decreased, and the asynchronous characteristics of the sediment peak and flood peak in the TGR changed simultaneously. Therefore, it is necessary to study the asynchronous characteristics of the flood peak and sediment peak and their causes, which can provide a theoretical basis for understanding the mechanism of the asynchronous characteristics of the flood peak and sediment peak and for optimizing the regulation of reservoir sediment peak discharge. The observed data of the hydrological station in the TGR from 2003 to 2018 and a theoretical analysis were used to analyse the new asynchronous characteristics of the flood peak and sediment peak in the TGR after the impoundment of the Cascade Reservoirs and to preliminarily explore the factors affecting the asynchronous changes. It was found that after the impoundment of the Cascade Reservoirs, the asynchronism of the flood peak and sediment peak in the TGR was aggravated, which revealed that the proportion of the hysteretic sediment peak increased, the propagation time of the flood peak decreased, and the propagation time of the sediment peak increased. The reasons for these changes were the source of incoming sediment being switched to the TGR, the reduction in the flood peak and the increased particle size of the suspended sediment. |
| |
| Keywords: | the cascade reservoirs flood peak sediment peak propagation characteristic the asynchronism the Three Gorges Reservoir |
| 本文献已被 维普 万方数据 等数据库收录！ |
| 点击此处可从《水科学进展》浏览原始摘要信息 |
|
点击此处可从《水科学进展》下载全文 |
|
