中文摘要：

选择垃圾渗滤液中邻苯二甲酸二甲酯（DMP）和邻苯二甲酸二丁酯（DBP）为特征污染物，通过室内实验确定了DMP和DBP在包气带土层的降解、吸附、弥散参数，建立了DMP和DBP在包气带迁移的对流-弥散数学模型．利用有限差分数值解方法，预测了DMP和DBP在包气带土层中迁移及其对饱水带地下水的污染风险结果表明，DMP和DBP的包气带污染距离分别可达6．5m和0．5m，DMP存在丰水期污染饱水带地下水的风险，而DBP的污染风险较小．

英文摘要：

The study selected dimethyl phthalate（DMP） and dibutyl phthalate（DBP） in landfill leachate as the characteristic contaminant to make sure the adsorption, degradation and dispersion parameters through laboratory experiments, establish the convection-dispersion mathematical mode of DMP and DBP migration in vadose zone. And its risk to groundwater in vadose zone were predicted by finite difference numerical solution method. The most tong-distances where the contaminant could get in the vadose zone： the DMP was 6.5m, and the DBP was 0.5m. DMP would contaminate the groundwater of saturation zone at rainy days, but DBP would have little affect on the groundwater.