渭河漫滩饱和带垂向渗透系数研究  

Research on vertical hydraulic conductivity of saturated zone in floodplain of Weihe river

作　　者：米海存[1] Chen X.H. 何红曼[1] 刘睿翀 段吉波 

机构地区：[1]长安大学环境科学与工程学院,陕西西安710054 [2]内布拉斯加林肯大学自然资源学院,美国林肯ne685830996

出　　处：《水资源与水工程学报》2014年第1期62-66,共5页Journal of Water Resources and Water Engineering

基　　金：国家自然科学基金项目(41072183)

摘　　要：采用竖管法现场测定渭河漫滩饱和带渗透系数,为测定漫滩沉积物渗透系数提供一种更为简便的方法。分析渗透系数各排内的变化以及各排之间的差别。应用Matlab软件检验实验数据的统计分布规律,应用地质统计原理计算渗透系数的变异函数并分析其空间变异性。分析得出各排的渗透系数属于对数正态分布。结果表明:①78个采样点测定垂向渗透系数平均值为11.35m/d,沿河岸线方向渗透系数相近,与河岸线垂直方向渗透系数差异较大;②渭河漫滩饱和带垂向渗透系数具有较强的空间变异性。This paper adopted a standpipe method to measure the vertical hydraulic permeability coefficient of a floodplain saturated zone in Weihe river so as to provide a more convenient way to determine the permeability coefficient of floodplain sediment. The paper analyzed the variations of hydraulic conductivity coefficient within a row and between rows. Matlab was used to test the statistical distribution rule of experimental data. The principle of geological statistics was applied to calculate the variation function of the coefficient and analyze the spatial correlation. The hydraulic conductivity values belong to lognormal distribution. The average Kvvalue of 78 sampling points is 11. 35m / d,the Kvvalue along the river is close and differs from the direction perpendicular to the river. The vertical hydraulic conductivity of the floodplain saturated zone in Weihe river has strong spatial variability.

关 键 词：竖管法 饱和带 垂向渗透系数 空间变异性 渭河漫滩 

分 类 号：TV139.1[水利工程—水力学及河流动力学]