柳林县供水项目水源地覆盖层渗透系数的计算方法

On Method to Calculate Percolation Coefficient in Overburden of Water Source Field of Liulin County's Water Supply Project

通过设置三个抽水井、四个观测井进行的抽水试验,利用两种确定影响半径的公式,分别计算得出单井试验时覆盖层的渗透系数,并利用群井抽水试验,将三个抽水井假想成一个大口井,计算得出覆盖层渗透系数,通过综合比较这些不同结果,最后确定了采用的渗透系数。

By means of water-pumping test in three pumping wells and four observation wells,and using two formulas of calculating groundwater influence radius,the calculated results of percolation coefficients for every well in overburden of water source field of Liuling County＇s water supply project are put forward.Subsequently,through the unity water-pumping test that is conducted together in three wells,a coefficient of a hypothetical large-diameter well which is composed by above-mentioned three wells is calculated.Through comprehensively comparing these different results of calculated cofficients,the suitable result is selected at last.