黄河小北干流河段水沙变化及冲淤特性  

Water & Sediment Volume Change of Xiaobeiganliu Reach of Yellow River and Its Erosion Characteristics

作　　者：刘社强[1] 郭宝群[1] 田文君[1] 

机构地区：[1]黄河水利委员会水文局,河南郑州450004

出　　处：《人民黄河》2015年第8期13-16,共4页Yellow River

摘　　要：依据实测水沙及淤积断面资料,对黄河小北干流河段水沙变化及冲淤特性等进行了分析。结果表明:1多年平均进入黄河小北干流的水、沙量分别为295.3亿m3、8.07亿t,汛期水、沙量分别占全年水、沙量的54.5%、87.7%,多年平均含沙量为27.3 kg/m3;2用实测淤积测验资料计算的1960—2012年黄河小北干流累计淤积量为23.26亿m3,"汛期淤积,非汛期冲刷"是该河段的冲淤特性;3床沙粒径小于0.025 mm和小于0.050 mm沙重百分数沿程分布的特点是自上游向下游沿程逐渐增大,即床沙逐渐变细。Based on the hydrometrical data of flow,sediment concentration and siltation,water＆amp;sediment volume change and scouring and silting characteristics of Xiaobeiganliu segment were analyzed. The results show that a）the average annual volume of water and sediment quantity that flow into the segment is 295. 3 × 10^8 m^3 and 8. 07 × 10^8 t respectively,among which 54. 5% and 87. 7% are in flood period. The average annual sediment concentration is 27. 3 kg/m^3 . b）The siltation volume during 1960—2012 of the segment is 23. 26× 10^8 m^3 , which reflects the scouring and silting characteristics in the segment-deposition in flood season and erosion in non-flood season. c）The percentage of sediment smaller than 0. 025 mm and 0. 050 mm on the river bed is gradually increasing from upstream to downstream,which means the particle size gets smaller along the river.

关 键 词：水沙变化 冲淤特性 小北干流 黄河 

分 类 号：P333[天文地球—水文科学] TV882.1[水利工程—水文学及水资源]