研究污染物在土壤中运移的时空规律, 为土壤环境质量评价及污染预测和防治提供科学的根据与途径, 具有重要的理论和实际意义. 通过建立土壤中污染物运移问题的全离散守恒混合元格式, 讨论了守恒混合元解的存在唯一性, 并给出了误差估计. 最后给出了数值算例, 数值模拟结果表明, 用该方法模拟污染物运移问题是合理有效的.

In this paper, a  contaminants transporting equation in the nonstick soil water is studied. The existence and uniqueness of its fully discrete mixed finite element (FD-MFE) solutions are proved, and   error estimates of FD-MFE solutions are analyzed.  Finally,  a numerical example shows that the method proposed here is effective.