摘要
本文研究了三峡水库减少淤积的双汛限水位调度方案及其综合影响 .建议在大洪水来临前 ,将坝前水位从 1 45m下降到 1 35m ,既腾空部分库容防洪、也增加冲沙减淤作用 .双汛限方案对航运和发电有一定的影响 .平均每年断航时间约 7d .但是变动回水区淤积大量减少 ,可改善通航条件 ,库区流速降低 ,既提高航运经济效益 ,也改善坝区通航条件 .后期可增加兴利库容 1 2亿m3以上 ,对于提高发电质量 ,改善枯水期下游通航条件也有好处 .还可增加水库初期排沙比 ,减轻下游河道冲刷 .双汛限方案是保持三峡水库长期效益的措施之一 .
An optimized operation scheme called double flood control levels scheme is proposed to reduce the deposition and enhance the flood control capacity of the reservoir in the Three Gorges Project. It is suggested that the water level of the reservoir should be additionally lowered to 135m before the emergence of the flood higher than 45,000 m 3/s, on the basis of the reservoir is controlled at a certain level in the flood season. Thereby, the sediment transport capacity of the reservoir can be enhanced and the deposition can be reduced. In the meantime, the reservoir capacity for flood control is expanded.
出处
《水利学报》
EI
CSCD
北大核心
2000年第10期1-11,共11页
Journal of Hydraulic Engineering
基金
国家杰出青年科学基金资助项目! ( 5992 592 1)
关键词
三峡工程
汛限水位
减少淤积
防洪库容
水库调度
Three Gorges Project
flood control level
deposition reduction
flood control capacity.
