寒武系中上统地层工业场址地下水污染研究

通常情况下在碳酸盐岩分布的地区,由于地下岩溶管道的发育,地下水主要赋存在大尺度的管道和裂隙中。地下水的流速和流向在空间上具有很大的差异性。以上问题造成在碳酸盐岩地区难以对地下水的流动和溶质运移问题进行数值模拟评价。但在实际工作中发现,某些白云岩裂隙水中地下水的运动符合孔隙水中的运动规律,溶质的运移符合弥散理论的基础条件。以松桃县某工业场地为例,研究该白云岩地层中地下水水质弥散参数的获取和参数特征,并以此为基础建立数值模型对污染情况进行模拟,采用现场试验对数值模型进行验证。数值模型采用Visual MODFLOW计算机辅助软件建立。通过验证表明,以泥质白云岩为主的碳酸盐岩地区的地下水流动及溶质运移适用于数值法进行模拟。

RESEARCH ON GROUNDWATER POLLUTION IN AN INDUSTRIAL SITE IN THE UPPER CAMBRIAN STRATA

Generally，because of karst growth， the velocity and direction of groundwater has great difference in space in the karst area． So the build-up of numerical model for simulating the groundwater flow and solute transport is very difficult． However，in practice，the movement rules of fissure water in the dolomite was found to conform to that in pore water． At the same time，solute transport mechanism conforms to basic conditions required for the diffusion theory． Taking an industrial site in Songtao County as an example，it was studied the dispersion parameter of groundwater quality in the dolomite formation and verified the numerical model through the field test． Visual MODFLOW computer software was used to establish the numerical model． Through the verification，the numerical method could simulate groundwater flow and solute transport in argillaceous dolomite stratum．