长江中游牧鹅洲关联演变河段航道整治方案

长江中游河段河床多为沙质,河床演变剧烈,受两岸石山、矶头和人工护岸工程等节点控制,上下游河段演变具有明显的关联性特征.以牧鹅洲水道为例,对其演变特征及其与下游湖广水道的关联特性进行分析,基于目前航道的不利变化趋势,结合已实施航道整治工程对本河段整治方案进行研究.通过在牧鹅洲水道实施护滩工程,同时解决牧鹅洲边滩中低滩冲刷...

Channel regulation scheme for associated evolution reach of Mu ezhou in middle reaches of the Yangtze River

The river bed in the middle reaches of the Yangtze River is mostly sandy,and the river bed evolution is violent,which is controlled by the nodes of rocky mountains,rock spurs and artificial revetment projects on both banks.The evolution of the upper and lower reaches has obvious relevance features.Taking the Mu ezhou channel as an example,we analyze its evolution characteristics and relevance features with the downstream Huguang channel.Considering the adverse change trend of the current channel and the implemented channel regulation project,we study the regulation scheme of the associated evolution reach.The implementation of the beach protection project in the Mu ezhou channel addresses the lower and medium beaches scouring in the Mu ezhou beach and the shallowing in Wangjiapu of the Huguang channel.Adopting a mathematical model and a physical model,we verify the effect of the scheme with post-flood observation data since 2020.The results show that after the scheme implementation,the scouring of Mu ezhou beach is effectively controlled,and the shoal channel pattern turns stable.Moreover,the channel width of 6 m water depth basically meets planning requirements.