摘要
本文建议在汛期中小流量时 (Q <35 0 0 0m3 s) ,将坝前水位维持在 14 8~ 15 1m ;出现汛情且流量更较大后 ,将坝前水位降低到 14 3m ;入库流量大于 35 0 0 0m3 s且短期预报将出现大于十年一遇洪水时 ,预泄洪水到135m .按这一调度 ,汛期约 80 %时间可以维持在较高水位 ,一般洪水期 .汛限水位 14 3m不影响坝区通航 ,135m水位迎洪可大量增加防洪库客 .到 10 0年后可减淤 30亿m3,增加防洪库容约 4 0亿m3.变动回水区减淤 4 0 % ,优化了坝区水沙搭配 ,可改善通航条件 .降低库区洪水位 ,缓解防洪与移民的矛盾 .可对发电带来较大好处 :提高发电效益 ,减少粗沙过机 .初期水库排沙比大于原方案 ,可减轻下游冲刷 .同时 ,可减小三峡汛初泄水与鄱阳湖防洪的矛盾 .
Based on the previous double flood control level scheme of operation proposed by the authors, a new scheme for further reducing the deposition and enhancing the flood control capacity of the TGP reservoir is presented.It is suggested that the impounding level should be raised to 148-150m in flood season when discharge is smaller than 35000m\+3/s and lowered to 143m otherwise,and furtter lowered to 135m when large flood of frequency smaller than 10% is predicted.The advantage of this new scheme is to further enhance the sluice capacity and minimize the possibility of blocking up of navigation due to sediment deposition.At the same time,the flood control capacity and power generation may also be increased.
出处
《水利学报》
EI
CSCD
北大核心
2002年第3期12-19,共8页
Journal of Hydraulic Engineering
基金
国家杰出青年科学基金资助项目 (5 992 5 92 1)
关键词
汛限水位
防洪
三峡水库
减淤增容
The Three Govges project
flood control level
deposition reduction
flood control capacity
optimization