摘要
近年来,三峡水库多次开展汛期沙峰排沙调度,排沙效果显著,而泥沙预报是沙峰排沙调度的关键环节。基于泥沙实时报汛技术,提出了一种结合降雨产沙理论、水沙相关关系、一维水沙数学模型计算等多种手段的三峡库区泥沙预报体系,对三峡库区内沙峰输移过程进行预报。2020年汛期,三峡水库出现较大入库水沙过程,利用提出的预报体系对沙峰过程开展了泥沙实时预报。泥沙预报结果表明:预报沙峰峰值与报汛值基本吻合,泥沙预报成果整体上精度较高,为2020年汛期三峡水库沙峰排沙调度提供了重要技术支撑。
In recent years,the Three Gorges Reservoir(TGR)has carried out operation of sand releasing in flood season for many times,and has acquired favorable effect.Sediment forecast is the key step in the operation of sediment discharge.Hence,we constructed a sediment forecast system to forecast the sediment peak transport in TGR.This system combines rainfall and sediment yield theory,flow-sediment relationship and 1-D flow-sediment mathematical model,on the basis of real-time sediment monitoring technology.We adopted the poposed system to forecast sediment peak transport progress when a large amount of water and sediment flowed into TGR during flood season in 2020.The forecast results showed that forecast values of sediment peak were basically consistent with the measured values,that was,overall accuracy of sediment forecast results were relatively high.The sediment forecast system provided an important technical support for operation of sediment discharge of TGR.
作者
杨成刚
许全喜
董炳江
袁晶
李圣伟
YANG Chenggang;XU Quanxi;DONG Bingjiang;YUAN Jing;LI Shengwei(Bureau of Hydrology,Changjiang Water Resources Commission,Wuhan 430010,China)
出处
《人民长江》
北大核心
2020年第12期82-87,共6页
Yangtze River
基金
长江水科学研究联合基金“长江上游洪峰沙峰异步传播机理及水沙产输模型研究”
中国长江三峡集团有限公司科研项目(0704166)。
关键词
泥沙预报
沙峰传播
排沙调度
预报体系
三峡水库
2020年长江洪水
sediment forecast
sediment peak transport
operation of sediment discharge
forecast system
Three Gorges Reservoir(TGR)
Changjiang River flood in 2020
