三峡蓄水后芦家河水道沙泓进口浅滩演变特征及其对航道条件的影响

三峡水库蓄水运用后,下游河段发生河流再造床过程,河床进行冲淤调整。基于芦家河水道三峡蓄水后2003—2013年原型观测资料,分析蓄水后该水道沙泓进口浅滩以及航道条件的变化情况,提出进口浅滩发展机理以及对航道条件的影响规律。在此基础上,对进口浅滩和本水道航道条件变化趋势进行预测:认为进口航道条件在自然作用下仍有进一步衰退的可能,为本水道航道治理思路的形成和方案设计提供参考。

Characteristics of Shahong entrance shoal of Lujiahe channel and its effect on channel condition after impoundment of the Three Gorges

Since the impoundment of Three Gorges reservoir,water and sediment to the downstream reach has changed,resulting in the process of river transformation on the Changjiang-Lujiahe river and erosion of the bed.Based on the latest prototype observation data of the reach after construction of the Gorges project,we analyze the changes about imported shoal of Shahong and the waterway conditions,and propose the development mechanism of the imported shallow of Shahong and the impact of the regularity on the waterway conditions.We also predict the trend of the bed evolution of the imported shallow and the waterway conditions,and consider that the waterway conditions maybe further decline under the natural role.The research result may serve as reference for the channel regulation ideas and engineering design in the project.