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三峡水库运用后,从三口进入湖区的水沙将会在中枯水期发生一定的变化,对草尾河航道产生一定影响.利用三口分流以及城陵矶水位研究的最新成果,计算蓄水20 a后进入该河段水沙的变化,水库调蓄作用导致草尾河在10、11月份水位下降,河段比降、流速均增加,部分日期不能满足通航要求;12月至次年3月份枯水期水位略有增加,且低于设计水位的天数有一定减小,河段比降、流速减缓,因此通航条件将会有一定的改善;4月份水位下降,比降、流速略有增加,5、6月份水位增加,且河段比降、流速减缓,在该3个月期间均满足通航条件.
After the Three Gorges Reservoir is used, the water and sediment entering the lake from the three ports will change a certain amount during the dry season, which will have an impact on the Caowei River waterway. Using the latest achievements of the three-way diversion and Chenglingji water level study, The changes of water and sediment in the reach of the river and the regulation and control of reservoirs led to the decrease of the water level of Caowei River in October and November, the decrease of river reach and the increase of the flow rate. Some of the dates did not meet the navigation requirements. The water level in the dry season from December to next March was slightly Increase, and the number of days below the design level is reduced, the river section down, the flow rate slowed down, so the navigation conditions will be some improvement; April water level down, down, the flow rate increased slightly, 5,6 month water level Increase, and the river section down, the flow rate slowed down during the three-month period to meet the navigation conditions.