两种挟沙力公式在黄河游荡段的适用性研究  

Study of the Suitability of Two Carrying Capacity Formulas of Suspended Sediment in Wandering Reach of the Yellow River

作　　者：刘欣 刘远征 LIU Xin;LIU Yuan-zheng(Design and Research Institute,Henan Yellow River Reconnaissance,Zhengzhou 450003,China;College of Geosciences and Engineering,North China University of Water Resources and Electric Power,Zhengzhou 450045,China)

机构地区：[1]河南黄河勘测设计研究院,河南郑州450003 [2]华北水利水电大学地球科学与工程学院,河南郑州450045

出　　处：《水电能源科学》2020年第12期24-27,共4页Water Resources and Power

基　　金：华北水利水电大学2019年大学生创新创业训练计划重点项目(2019XA009)。

摘　　要：基于黄河游荡段花园口断面、水文站及夹河滩断面、水文站的实测数据,对张瑞瑾挟沙力公式和张红武挟沙力公式在黄河游荡段的适用性进行了分析。张瑞瑾公式结构简单,但准备数据过程复杂,通过分段函数拟合,给出了确定系数K和指数m的有效办法;张红武公式结构复杂,准备过程简单,且计算结果更贴近45°线。此外,张瑞瑾公式不需要实测的体积含沙量,强调一定水流条件下能够携带的碎屑物质量,适用范围更广;张红武公式则需要实测体积含沙量,强调挟沙水流对河床的冲、淤趋势,计算精度更高。与实测数据相比,两者均能反映水流挟沙力的情况,对所选用数据二者计算结果相关系数达0.985,说明在计算黄河游荡段挟沙力时两者均适用。Huayuankou is an important place in wandering reach of the Yellow River.According to the data of the hydrologic station and channel cross-section,carrying capacity of supended sediment is calculated by different formulas of Zhang Hongwu and Zhang Ruijin.The structure of Zhang Ruijin’s formula is simple.But many parameters are analyzed for achieving a dependable calculation.Piecewise function is used to determine the coefficient K and exponent m.In Zhang Hongwu’s formula,the sediment concentration is needed,and the structure is more complex.However,the parameters for calculation are easily obtained.Compared with the measured data,the result obtained by Zhang Hongwu’s formula is less error than that of Zhang Ruijin’s.However,the correlation coefficient of the results by the two formulas is 0.985.It means that the two formulas are similar when they are used to calculate the carrying capacity of supended sediment in the wandering reach of the Yellow River.

关 键 词：挟沙力 非均匀沙 黄河游荡段 水尺 

分 类 号：TV147[水利工程—水力学及河流动力学]