上荆江瓦口子至马家咀河段河床演变趋势预测研究  

Study of Bed Deformation Trend of Wakouzi-Majiazui Section in the Upper Jingjiang Reach of Yangtze River

作　　者：张红 刘启航 ZHANG Hong;LIU Qihang(Zigui County Water Administrative Law Enforcement Team,Yichang 443600,China;Hubei Hanxin Water Consulting Co.,Ltd.,Wuhan 430070,China)

机构地区：[1]秭归县水行政执法大队,湖北宜昌443600 [2]湖北汉鑫水务咨询有限公司,湖北武汉430070

出　　处：《人民珠江》2021年第9期77-85,共9页Pearl River

摘　　要：三峡水库蓄水运用以来,长江中游荆江沙质河段的河床冲淤调整变化显著,河道及洲滩演变趋势备受关注。以瓦口子至马家咀河段为例,采用平面二维水沙数学模型结合近期河段河道地形及来水来沙情况,对河段未来20年河床演变趋势进行了模拟预测。研究结果表明,未来20年内瓦口子至马家咀河段的总体河势将保持稳定,河道主槽将持续冲刷且河床冲刷逐步向下游发展。金城洲变化不大,突起洲左汊淤积、右汊冲刷,继续维持“左支右主”的分汊格局,为河道和整治工程提供重要参考。The riverbed scour and deposition of sandy section in Jingjiang reach of Yangtze River deforms dramatically since the operation of the Three Georges Reservoir.Taking the Wakouzi-Majiazui section as the example,based on recent channel topography and hydrological data,this paper simulates and predicts the bed deformation trend of the section for the next 20 years through a two-dimensional flow-sediment numerical model.The results indicate that:The river regime of Wakouzi-Majiazui section is generally stable for the next 20 years,and the main channel erosion will continue and develop downstream.The Jincheng sandbar shows no significantly variation,and the evolution of Tuqi sandbar is characterized by the sedimentation of left branch and scouring of right branch,with the right branch in dominant position continuously,which offer an important reference for channel and waterway regulation.

关 键 词：突起洲 金城洲 瓦口子水道 马家咀水道 

分 类 号：TV147[水利工程—水力学及河流动力学]