在实地调研和对大量实测资料分析的基础上 ,对该河段近年来的冲淤特性进行深入分析后指出 :该河段近年来河道淤积量尤其是主槽淤积量明显增加 ,导致滩槽高差减小 ,河槽排洪能力下降 ,已建工程防洪标准降低 ,工程临背差加大 ,险情发生频繁 On the basis of field investigation and analysis of a large number of measured data, the paper analyzes the scouring and silting characteristics of this section in recent years and points out that: in recent years, the siltation of the channel, especially the main channel, has obviously increased, leading to high trough height The difference decreases, flood discharge capacity of the river channel decreases, the flood control standards of the existing projects have been reduced, the number of temporary backprojects has increased, and the danger has been frequent