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针对三峡水库入库水沙条件及实际运行方式的变化,计算分析了三峡水库蓄水方案变化对水库泥沙运动及变动回水区航运条件造成的影响.采用一维水沙数学模型,计算了不同蓄水方案对水库泥沙淤积情况的影响及各方案间的差别,进而对方案调整后变动回水区重点浅滩的水深变化进行了研究.结果表明,在新的水沙条件及考虑上游建库的影响下,蓄水方案调整带来的影响主要集中在6~11 a,并随水库运行时间的延长而缩小,不会对变动回水区浅滩河段通航条件产生不利影响.
According to the change of water and sediment conditions and actual operation mode of the Three Gorges Reservoir, the influence of the Three Gorges reservoir storage scheme on the sediment movement and the shipping conditions in the fluctuating backwater area has been calculated and analyzed. Using the one-dimensional mathematical model of water and sediment, The influence of different water storage schemes on reservoir sedimentation and the differences among various schemes, and then the water depth changes of key shallow shoals in the fluctuating backwater area after the program adjustment were studied.The results show that under the new conditions of water and sediment and considering the upstream Under the influence of the reservoir, the impact of the water storage plan adjustment will mainly be concentrated in 6 ~ 11 a and will decrease with the extension of the reservoir operation time, and will not adversely affect the navigable conditions of the shoals.