三峡水库变动回水区泥沙问题研究

通过分析三峡水库运用前后的入库水沙特点和变动回水区泥沙冲淤变化规律后认为:建库前该河段年际间河床冲淤基本平衡.三峡水库运用5年来,入库沙量比建库前有较大的减少;该河段总体淤积,主要淤积在边滩,深槽淤积较少甚至有冲刷,土脑子河段发生河型转化;由于长江上游水库拦沙的作用,变动回水区河段的泥沙淤积速率会比原来预计的要小.

Study on sedimentaion within fluctuation backwater area of Three Gorges Reservoir

Based on the analysis of the features of both the inflowing water and sediment and the de-silting law within the fluctuation backwater area before and after the operation of Three Gorges Reservoir,it is concluded that the bed de-siltation of the river reach among years before the reservoir construction is basically equilibrated.However,the inflowing sediment is larger that before the reservoir construction five years since the operation of Three Gorges Reservoir,and then the river reach is generally silted,...