摘要
黄河下游特殊的来水来沙条件和独特的地理环境使高村-艾山河段成为了典型的“驼峰”河段。利用黄河下游各水文站1990-2020年的水沙实测资料,重点分析了黄河下游花园口-高村、高村-艾山河段来水来沙情况和断面形态特征,并通过黄河下游不平衡输沙率公式,建立排沙比与河道来沙系数、河相系数之间的函数关系。结果表明:小浪底水库投入运行后黄河下游“驼峰”河段来沙量急剧减少。在此基础上构建了黄河下游排沙比与淤积量之间的数值关系,并进一步建立了排沙比与来沙系数、河相系数之间的幂函数公式,该公式可以根据黄河下游河道来水来沙条件和河道断面形态等参数更加准确地计算出下游各河段的冲淤变化情况。
Due to the special water and sediment inflow conditions and unique geographical environment,the Gaocun-Aishan reach of the lower Yellow River has become a typical“hump”reach.Taking the water and sediment data of hydrological stations in the lower Yellow River from 1990 to 2020 as the research object,this paper focuses on the water and sediment inflow and section morphological characteristics of Huayuankou-Gaocun and Gaocun-Aishan sections in the lower Yellow River,and establishes the functional relationship between sediment discharge ratio,river sediment inflow coefficient and river facies coefficient using the formula of non-equilibrium sediment transport rate.The results show that after the Xiaolangdi Reservoir was put into use,the sediment inflow in the hump reach of the lower Yellow River decreased sharply.Based on this situation,the numerical relationship between the sediment discharge ratio and the sediment deposition in the lower Yellow River is constructed and the power function formula of sediment discharge ratio,sediment inflow coefficient and river facies coefficient is further established.This formula can calculate the scouring and silting changes of each reach more accurately using the parameters such as water and sediment inflow conditions and river section morphology of the lower Yellow River.
作者
黄飞扬
周子骏
HUANG Feiyang;ZHOU Zijun(College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210024,China;Nanjing Hydraulic Research Institute,Nanjing 210024,China)
出处
《水资源与水工程学报》
CSCD
北大核心
2022年第4期125-132,共8页
Journal of Water Resources and Water Engineering
基金
中央级公益性科研院所基本科研业务费专项资金项目(Y222010)。
关键词
来水来沙条件
水沙关系
驼峰河段
来沙系数
河相关系
黄河下游
water and sediment inflow condition
water sediment relationship
hump reach
sediment inflow coefficient
river facies relationship
the lower Yellow River
