摘要
针对黄河下游高村—孙口河段近年来平滩流量偏小的情况,通过分析各河段历年平滩流量变化情况、河槽冲淤变化情况、下游河道几何形态和下游来水来沙情况,认为20世纪90年代后期至2001年日益严重的断流或准断流是导致平滩流量偏小的主要因素;下游"上陡下缓"的剖面形态与非汛期孙口以上河段水面宽相差不大的特点遭遇,也有利于孙口附近河段淤积。
In response to the issue that the Gaocun-Sunkou reach of the lower Yellow River had a smaller bankfull discharge than its upstream and lower reaches in the recent years,the author did an in-depth analysis of annual bankfull discharges in the different reaches,deposition and erosion in main channel,channel configuration and oncoming flow and sediment conditions.It is found out that the main factor that caused the smaller values of the bankfull discharge in period from late 1990's to 2001 is ever-aggravated flow cut-off.The longitudinal profile featuring decreased slope in the downstream direction,combined with the less differences of river widths upstream of Sunkou during non-flood season,makes sediment silting easy in the reach around Sunkou.
出处
《人民黄河》
CAS
北大核心
2009年第5期21-22,25,共3页
Yellow River
关键词
河槽冲淤
断流
平滩流量
高村—孙口河段
黄河下游
deposition and erosion in main channel
flow cut-off
bankfull discharge
the reach from Gaocun to Sunkou
the lower Yellow River
作者简介
刘晓燕（1964-），女，河南永城人，博士，研究方向为河流健康。E-mail：Liuxiaoyan@yrec．gov．cn
