长江上游莲石滩航道生态整治方案  

Ecological channel regulation of Lianshitan in upper Yangtze River

作　　者：曾涛 范鹏朋 陈希 ZENG Tao;FAN Peng-peng;CHEN Xi(Chongqing Shipping Engineering Survey and Design Institute of the Yangtze River,Chongqing 401147,China)

机构地区：[1]长江重庆航运工程勘察设计院,重庆401147

出　　处：《水运工程》2022年第9期141-146,165,共7页Port & Waterway Engineering

摘　　要：20世纪以来,长江上游频繁的采砂活动造成河道地形变化剧烈,采砂河段航道内泥沙淤积威胁通航安全。以长江上游莲石滩为例,在综合分析水沙条件的基础上,着重分析了洲滩破坏后河道地形及航道条件的变化,结合外部调研情况,针对碍航特性提出了治理方案。除通过疏浚、清礁保障航道水深外,采用筑坝与回填固滩相结合的形式恢复关刀碛心滩高大完整的形态以提高中洪水束水能力,并采用清礁石料、生态鱼巢砖等构建生态涵养区以营造良好的生境。模型研究表明生态整治方案效果较好,可为类似滩险的治理提供一定参考。Since the 20^(th) century,the frequent sand mining activities in the upper Yangtze River have caused dramatic changes in the river topography,and the sediment deposition in the channel of the sand mining reaches has threatened navigation safety.Taking Lianshitan in the upper Yangtze River as an example,this study comprehensively analyzes its water and sediment conditions and focuses on the changes in river topography and channel conditions after the destruction of the islands and bars.Then,it puts forward a regulation scheme according to the navigation-obstructing characteristics and the external investigation.In addition to dredging and reef clearing to ensure the channel depth,damming and shoal consolidation with backfilling are combined to restore the high and complete form of the Guandaoqi central bar and thereby improve the flow-converging capacity for medium floods.Moreover,the reef clearing stone and ecological fish nest bricks are used to build an ecological conservation area and ultimately create a pleasant ecological environment.The model study shows that the proposed ecological regulation scheme is effective and provides a reference for the regulation of similar shoals.

关 键 词：长江上游 航道生态整治 莲石滩 碍航特性 

分 类 号：U617[交通运输工程—船舶及航道工程]