【摘要】 在各项异性渗流模型的基础上,建立了地下水污染物质输移运动的二维数学预测模型,采用有限元法对渗流和污染物分布进行模拟,并且用解析解检验了数学模型的可靠性。对于污染物随地面降雨入渗的二维非恒定问题,计算结果与已有文献进行比较,证明了数值模拟的可信度。进一步实际模拟在非均匀介质情况下的污染物随地下水输移过程,分析了介质的透水特性对污染物浓度的影响。更多还原

【Abstract】 A twodimensional numerical model for the prediction of contaminant transport in groundwater was developed based on an unisotropic seepage flow model. The finite element method was used to simulate the seepage flow and contaminant distribution. The reliability of the numerical model was checked by analytical solution. As for the twodimensional unsteady problems of contaminant infiltration along with rainfall, the calculated results were compared with those in the literature. The reliability of the numerical simulation was verified. Additionally, the process of contaminant transportation in nonuniform medium was simulated. And the impact of medium infiltration characteristic on contaminant concentration was analyzed.更多还原