人民黄河2018，Vol.40Issue(5)：12-16,5.DOI:10.3969/j.issn.1000-1379.2018.05.003
黄河小北干流河段洪水演进规律变化分析
Variations in Flood Routing Rules in Xiaobeiganliu Reach of the Yellow River
摘要
Abstract
In order to provide references for the river management works in Xiaobeiganliu reach of the Yellow River,by using 50 big floods data which are over 6,000 m3/s during the years from 1960 to 2015 of Longmen Hydrological Station,the rule of flood routing in Xiaobeigan-liu reach of the Yellow River was analyzed. The results show that the average flood propagation time in Xiaobeiganliu reach is 15.2 hours,af-ter 1986 the propagation time gradually extends,reaches the maximum in 2003. In recent years, with the continued erosion of the channel propagation time was shortened,approximately 20 h. The average flood clipping rate in Xiaobeiganliu reach is 30%, in late 1960s to early 70s and 90s until 2015 is two periods that clipping rate is high, after 2003 with river scour occurs across the board, clipping rate is de-creased. The variation of flood propagation time and clipping rate correlates closely to the conditions of river and the conditions of water and sediment. After the construction of Sanmenxia Reservoir, river channel sedimentation causes the over-current capacity weakened and the reach suffered unfavorable water and sediment conditions since 1990s is the direct reason that the flood propagation time prolongs and the clipping rate increases.At the same time,the flood peak flow size,peak shape and the bottom tearing erosion may also influence the propaga-tion time and clipping rate.关键词
传播时间/削峰率/演进规律/洪水/小北干流/黄河Key words
propagation time/clipping rate/routing rule/flood/Xiaobeiganliu reach/Yellow River分类
建筑与水利引用本文复制引用
李保国,崔振华..黄河小北干流河段洪水演进规律变化分析[J].人民黄河,2018,40(5):12-16,5.基金项目
国家重点研发计划项目(2016YFC0402407). （2016YFC0402407）
