黄河内蒙古河段洪水期冲淤临界条件分析  

Critical condition of erosion or deposition during flood season in Inner Mongolia reach of the Yellow River

作　　者：林秀芝[1] 苏林山 李婷[1] 常温花[1] 

机构地区：[1]黄河水利委员会黄河水利科学研究院水利部黄河泥沙重点实验室,河南郑州450003 [2]黄河水利委员会黄河勘测规划设计有限公司,河南郑州450003

出　　处：《泥沙研究》2015年第4期26-30,共5页Journal of Sediment Research

基　　金："十二五"国家科技支撑计划项目(2012BAB02B03);中央级公益性科研院所基本科研业务费专项(HKY-JBYW-2013-07;HKY-JBYW-2014-05)

摘　　要：分析了黄河内蒙古巴彦高勒-三湖河口和三湖河口-头道拐河段洪水期冲淤变化与水沙组合因子的响应关系,结果表明,两河段洪水期单位水量冲淤量与来沙系数的相关关系最密切。上段1952-1968年、1969-1986年和1987-2012年三个时段其相关系数分别达到0.83、0.80和0.94,都有随着来沙系数增加单位水量淤积量增加的趋势,洪水期冲淤临界来沙系数分别为0.0040kg·s/m6、0.0046kg·s/m6和0.0063kg·s/m6;下段1952-1968年和1987-2012年两个时段其相关系数分别达到0.96和0.84,洪水期冲淤临界来沙系数分别为0.0055kg·s/m6和0.0050kg·s/m6。对于上段洪水期,当平均含沙量大于10kg/m3时,各级流量洪水都发生淤积;当平均含沙量小于7kg/m3时,各级流量洪水都发生冲刷。Analysis is based on the variation of erosion or deposition and the relationship between combination factors of runoff and sediment load in the upper reach of Yellow River from Bayangaole to Sanhuhekou and Sanhuhekou to Toudaoguai during flood season in Inner Mongolia. The results show that erosion or deposition per cubic meter water is most closely related to empirical coefficient of runoff and sediment load in two reaches during flood period. The erosion or deposition per cubic meter water is increasing with growing of empirical coefficient of runoff and sediment load from 1952 to 1968,1969 to 1986 and 1987 to 2012. Correlation coefficients are 0. 83,0. 80 and 0. 94,and critical empirical coefficients of runoff and sediment load are 0. 0040 kg·s/m6,0. 0046 kg·s/m6 and 0. 0063 kg. s / m6 during flood season in upper reach,respectively. While erosion or deposition per cubic meter water has a high positive correlation with empirical coefficient of runoff and sediment load from 1952 to 1968 and 1987 to 2012. It is suggested that when average sediment concentration is more than 10 kg / m3,deposition is caused in each flood level; while when average sediment concentration is less than 7kg / m3,erosion is caused in each level flood.

关 键 词：洪水期 冲刷 淤积 临界条件 内蒙古 黄河 

分 类 号：TV147[水利工程—水力学及河流动力学]