三峡蓄水后长江中游设计最低通航水位预报

摘要

设计最低通航水位是长江航道系统整治的关键技术参数之一.依据历史水文资料和水库设计运行方式,推算了三峡单库运行、三峡与上游控制性水库联合运行两种情况下,长江中游宜昌至武汉河段的设计最低通航流量,采用一维泥沙数学模型预测了两种情况下长江中游主要水文站的水位变化趋势,结合近期三峡电站日调节对下游各站的影响情况,预报了三峡蓄水后20a、30a宜昌至武汉河段的设计最低通航水位.%The design lowest navigable stage is one of key technical parameters for the systematic waterway regulation of the Yangtze River.Based on the historical hydrological data and the design operation of Three Gorges Project,the design minimum traffic flow under the condition of single operation of Three Gorges Project and joint operation with the upstream reservoirs was calculated in the middle reaches.And the change trend of water level corresponding to above situation was predicted by one-dimensional sediment mathematical model.Combined with daily regulations caused by the dam,the design lowest navigable stage after 20 a,30 a impoundment of Three Gorges Project was forecasted between Yichang and Wuhan reach.