长洲枢纽下游河床下切水位下降原因分析  

Causes analysis of undercutting water declining of Changzhou hub downstream riverbed

作　　者：欧诚 庹莜葭 舒丹[2,3] 吴林键[2,3] 

机构地区：[1]广西壮族自治区港航管理局,广西南宁530408 [2]重庆交通大学国家内河航道整治工程技术研究中心,水利水运工程教育部重点实验室,重庆400074 [3]重庆交通大学河海学院,重庆400074

出　　处：《水运工程》2014年第4期138-142,共5页Port & Waterway Engineering

基　　金：国家科技支撑计划(2011BAB09B00);重庆市重大科技攻关项目(CSTC;2009AA6029);重庆市交委科技项目(2011-15)

摘　　要：近年来,长洲枢纽下游航道水位实测值呈现下降趋势,与原航道水位设计值不符。通过收集该河道的水文资料对河床演变原因进行分析。结果表明:上游来水来沙对枢纽下游河床的影响、下游河道过度采砂、河流梯级开发及水利枢纽建设以及航道整治建筑物的修建等是导致长洲枢纽下游河床下切水位下降的原因。结合该处具体情况,提出控制枢纽下游河道过度采砂、采用限制性整治措施以及加强河道断面检测的改善措施,为确保长洲枢纽下游航道的正常通航提供技术支撑。In recent years,the measured value of channel water level in Changzhou hub downstream has shown a trend of declining,which was inconsistent with the design value of the original channel water level. An analysis for the reason of bed evolution is carried out based on the hydrological data of the channel,and the result shows that the reasons for the declining of the channel water level of Changzhou hubs downstream lies in the influence of riverbed hubs downstream from upstream inflow and sediment, excessive sand mining in downstream river channel, river cascade development and construction of water conservancy, as well as the construction of waterway regulation buildings,etc. Combining with the practical situation of the site,we put forward the improvement measures including controlling the excessive sand mining in the hubs downstream river channel,taking restrictive regulation measures and strengthening detection of the river section,which provides a support for the normal navigation of Changzhou hub downstream channel.

关 键 词：长洲枢纽下游 河床下切 水位下降 原因 改善措施 

分 类 号：U657.2[交通运输工程—港口、海岸及近海工程]