淮河干流刘台子弯道河段水沙特征及变化趋势

以淮河干流鲁台子站1951—2015年的水沙原型资料为基础,基于SPSS、Matlab等工具,采用累积距平、M-K和R/S分析等方法,研究刘台子河段来水来沙特性及变化趋势。结果表明:在径流量未发生系统增加或减少的前提下,输沙量和含沙量均呈明显降低趋势,至2000年以后含沙量基本稳定在0. 1 kg/m~3;来沙变化具有较明显的阶段性特征,输沙量突变开始年份在1984年左右,含沙量突变和开始年份发生在1980—1986年;输沙量与含沙量在未来一段时间整体呈现增加的趋势;该河段河床整体以冲刷下切为主。

Water and sediment characteristics in curved section of Liutaizi in main stream of Huaihe River

Based on the data from 1951 to 2015 of water and sediment prototype of Lutaizi station of Huaihe River main stream,we apply the tools including SPSS and Matlab,methods including correlation analysis,cumulative anomaly,M-K and R/S analysis to study the the characteristics and change trend of water and sediment in the Liutaizi river section.The results show that,on the premise of no increasing or decreasing of the flow rate,the sediment transport and sediment content are obviously reduced,and the sediment content is basically stable in 0.1 kg/m3 after the year of 2000,and the change of sand sediment has a distinct stage characteristic.The change of sediment transport volume begins in the year of 1984,the sediment content mutation and the beginning of the year.From 1980 to 1986 years,the sediment discharge and the sediment concentration show an increasing trend .The river bed is mainly scoured and undercut.