三峡水库减淤增容调度方式研究——多汛限水位调度方案

本文建议在汛期中小流量时（Q<35000m3/s），将坝前水位维持在148～151m；出现汛情且流量更较大后，将坝前水位降低到143m；入库流量大于35000m3/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143m不影响坝区通航，135m水位迎洪可大量增加防洪库客。到100年后可减淤30亿m3，增加防洪库容约40亿m3.变动回水区减淤40%，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。

Optimized operation scheme for deposition reduction and enhancement flood control capacity of Three Gorges Project reservoir

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 35000m3/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.