黄河下游水沙变化及河床纵横断面的演变  

Water & sediment load variation and development at longitudinal & transversal profiles of the lower Yellow River

作　　者：王兆印[1] 周静[1] 李昌志[2] 

机构地区：[1]清华大学水利系,北京100084 [2]中国水利水电科学研究院,北京100044

出　　处：《水力发电学报》2006年第5期42-45,共4页Journal of Hydroelectric Engineering

基　　金：科技部国际科技合作重点项目(2004CB720402)

摘　　要：近年来,黄河下游来水来沙出现一些新的特点,水沙的变化必然影响下游河床纵剖面和横断面的调整变化。本文利用黄河下游1960-1997年的水沙资料和1977-2002年的断面资料统计分析了黄河下游水沙历年、汛期和脉动变化特点以及主槽平均河床高程和河相系数变化特点。分析表明:1)1986年以后,黄河下游水沙量和水沙脉动量显著减少,艾山以下河流非汛期时常出现断流现象;2)黄河下游纵剖面呈S型发展;3)黄河下游主槽断面面积减小,主槽明显萎缩。In the past 30 years, the lower Yellow River has been watching obvious variation in water and sediment load, which has caused the readjustment of longitudinal ＆ transversal river bed profiles. This article studies the characteristics of the water ＆ sediment load from 1960 to 1997 and the longitudinal ＆ transversal bed profile from 1977 to 2002 by employing statistic analysis. The main results are： i） Water ＆ sediment load and their fluctuation decreases sharply after 1986. The river is dried up very often in the reach from Aishan to Lijin; ii） The longitudinal profile of the lower Yellow River is developing toward an S shape; iii） The wet area of the stem channel of the lower Yellow River becomes smaller.

关 键 词：河流泥沙工程学 黄河 来水来沙 纵剖面 河相系数 

分 类 号：TV143.5[水利工程—水力学及河流动力学]