浅层含水层导水系数空间变异分析——以河套平原呼和浩特市为例

An analysis of spatial variation in transmissivity in shallow aquifers,exemplified by the Hetao Plain near Hohhot

水文地质参数空间变异性是影响地下水水流及溶质运移不确定性的主要因素。呼和浩特市浅层地下水导水系数空间变异研究对导水系数等值线的绘制与校正有实际意义。剔除异常值后,利用地质统计方法研究区域、N-S向、E-W向剖面的空间分布,利用GS+对其空间变异结构进行分析,得出以下结论:导水系数在区域上属于强变异程度,N-S向剖面属于强变异程度,E-W向剖面上属于中等变异程度;导水系数在区域上、N-S向剖面、E-W向剖面均近似服从对数正态分布;区域上变程为2910m,E-W向剖面变程为3729.92m,N-S向剖面变程为2478.74m。

The spatial variation of Hydrogeological parameters is the main factors of affecting uncertainty of groundwater flow and solute transport. There is practical significance to study Hohhot shallow groundwater conduction coefficient spatial variation in drawing and correcting the isoline of conduction coefficient. After eliminating the outliners, using the method of geological statistics to study the spatial distribution of whole area, N -S profile, E- W profile, using GS ＋ to analyze the spatial variation structure of conduction coefficient, we come to conclusions that： hydraulic conduction coefficient belongs to high degree of variation in whole area, the N -S profile belongs to high degree of variation and E - W profile belongs to moderate degree of variation; shallow groundwater hydraulic conduction coefficient approximate obeys the logarithmic normal distribution in whole area, the N -S profile and E- W profile; the range of shallow aquifer conduction coefficient of Hohhot city in area is 291Om, the range of E-W direction is 3729. 92m, he range of N-S direction is 2478. 74m.