基于电导率深度变化曲线的地层渗透系数变化趋势模拟方法

Simulation Method of Hydraulic Conductivity Trend Using Electrical Conductivity Curve

渗透系数(K)是影响地下水流运动和溶质运移的重要水文地质参数之一。为研究地层垂向渗透系数(K_v)连续变化情况,引入滤波处理电导率实测曲线法,建立了滤波后电导率(E′C)与K_v的回归模型。结果表明,K_v与E′C的深度变化曲线具有较好的相似性,利用所提出的估算方法可以对地层渗透系数进行合理的估计,掌握地层渗透系数沿深度连续变化的情况,区分地层渗透系数高低,具有较强的应用前景。

Hydraulic conductivity is one of the most important hydrogeological parameters for influencing groundwater movement and solute transport. Filter method is introduced into the regression model of Kv and E′C in order to study the continuous variation of Kv . The results show that the curve of Kv changing with the depth is similar to the curve of E′C-depth. The proposed method can yield a reasonable estimation of hydraulic conductivity. The new method has a promising application prospect to model the continuous variation of hydraulic conductivity and to distinguish the zone of high and low hydraulic conductivity.