摘要
铜锣峡至涪陵河段位于三峡水库库尾,长约110km,以该河段为研究对象,在深入研究河段内泥沙冲淤规律的基础上,分析了其冲淤变化的主要影响因素,结果表明,消落期该河段的泥沙冲淤变化主要受消落前期泥沙冲淤量、入库水沙条件、三峡水库坝前水位及其消落速率等因素影响,其规律十分复杂;研究提出了三峡水库库尾河段复杂因素影响(包括床沙组成、水沙条件、三峡水库运行调度方式等)的走沙条件,为三峡水库的泥沙调度提供了必要的参考数据和技术支持。
The reach from Tongluoxia to Fuling in the Yangtze River, with a length about llOkm, is in the fluctuating backwater area of Three Gorges Reservoir (TGR). This reach is selected as the research object. Based on analysis of the scouring and silting in the fluctuating backwater area of TGR, the mainly affecting factors to the scouring and silting change law is studied. Results show that in the falling period, the sediment scouring and silting amount is mainly affected by three factors: the early scouring and silting amount, incoming flow and sediment condition, the water level of Three Gorges Reservoir in front of the dam and its falling rate. The erosion and deposition conditions at the fluctuating backwater area are presented, including bed sediment composition, flow and sediment conditions, and the dispatching operation of the TGR. Those results provide the necessary reference data and technical support for the sediment scheduling of the TGR.
出处
《泥沙研究》
CSCD
北大核心
2015年第3期15-20,共6页
Journal of Sediment Research
基金
国家重点基础研究发展计划(973)项目(2012CB417001)
国家自然科学基金项目(51479146)
水利部公益性行业科研专项(201401011
201401021)
关键词
三峡水库
变动回水区
泥沙冲淤特性
消落期
走沙条件
Three Gorges Reservoir
fluctuating backwater area
water level in front of dam
drawdown period
erosion condition