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 . This paper proposes to maintain the water level in front of the dam at 14 8-15 1 m during the medium and small flood season (Q <35 000 m 3 s), reduce the water level in front of the dam to 14 3 m after the flood occurs and the flow rate is larger, Is greater than 3500m3 s and short-term forecast will occur more than once a year floods, the pre-discharge flood to 135m. According to this schedule, about 80% of the flood season can be maintained at a higher water level, the general flood period. 3m does not affect the navigation of the dam area, 135m water level welcome flood can increase flood control library passenger .10 years after the reduction of 3 billion m3, an increase of flood control capacity of about 40 million m3. Change backwater area 40% reduction siltation, optimization The combination of water and sediment in the dam area can improve the navigational conditions, reduce the flood level in the reservoir area and ease the contradiction between flood control and immigration, which can bring great benefits to power generation: improve the power generation efficiency and reduce the overburden. The original plan can reduce the erosion of the lower reaches and reduce the contradiction between the initial discharge of the Three Gorges flood and the flood control of Poyang Lake.