策克白垩纪承压水含水层渗透系数变化规律

Variation Regulation of Permeability Coefficient in Cretaceous Confined Water Aquifer in Ceke

以渗透系数的对数作为区域化变量,计算0度、90度方向的试验变差函数,并进行理论变差函数模型拟合,所得结果用来分析策克地区白垩纪承压含水层空间结构并判定含水层可能的各向异性。变差函数模型经交互验证后,再采用普通克里格法进行二维空间插值获得该含水层的渗透系数二维分布。利用地质剖面资料、岩土样分析成果、岩相古地理分析成果对插值得到的二维对数渗透系数等值线图进行验证。

The article takes the logarithm （ base e ） of permeability coefficient as regionalized variables to calculate ex- perimental variation function of direction of 0° , direction of 90°, to conduct fitting of the theoretical model of variation func- tion, the results was used to analyze the spatial structure of the aquifer and to determine the potential anisotropy of aquifer. Af- ter we got the model of variation function by cross validation, then used ordinary kriging for two - dimensional spatial interpola- tion for two - dimensional distribution of the coefficient of permeability in aquifer. Geological cross section data, geotechnical sample analysis results, the results of lithofacies palaeogeography analysis the interpolated. Key words ： Hydrogeological condi- tions, geostatistical analysis, coefficient of permeability, Experimental variation function, rtwo - dimensional spatial interpola- tion, map of logarithm （ base e ） of permeability coefficient interpretation, two - dimensional contour map of logarithm （ base e ） of permeability coefficient interpretation