摘要
长江中游罗湖洲河段为典型的鹅头分汊型河道,其以河势变化频繁、浅滩冲淤剧烈为主要演变特征,河道航行安全存在严重隐患.在进口节点群的挑流作用下,罗湖洲河段水动力特性有异于其他分汊河型,进而影响河床年内冲淤分布规律.以三峡水库蓄水前2001~2003年水文系列为例,通过对比不同几届洪、中、枯水期心滩冲淤性质以及冲淤幅度的变化,分析了年内流量过程对心滩冲淤的影响,总结了影响不同心滩部位冲淤的特征流量,可为水库蓄水引起的年内水沙过程改变对河道冲淤特性的影响研究提供参考.
Evolution within a year of the goose-headed braided channel is different from other river patterns because of flow deflecting by the fixed node situated in the inlet of channel.Based on a case study of Luohuzhou reach,a typical goose-headed channel located in the middle of the Yangtze River,comparison among evolution properties and discharge magnitude in several hydrological years is promoted.By analyzing the response of riverbed to discharge process,several hydraulic characteristic values are obtained.
出处
《武汉大学学报(工学版)》
CAS
CSCD
北大核心
2014年第4期445-451,共7页
Engineering Journal of Wuhan University
基金
中央级公益性科研院所基本科研业务(编号:CKSF2014017)
国家自然科学基金面上项目(编号:51379018)
关键词
鹅头分汊河型
心滩演变
径流过程
goose-headed pattern braided channel
shoal evolution
discharge process