本文根据欧拉-拉格朗日坐标相结合解法、交替方向解法和有限单元法的基本思想,提出了求解二维饱和-非饱和溶质运移问题的交替方向特征有限单元法(ADCG)。计算实例结果表明,ADCG集这三种解法之优点,在克服数值弥散和数值波动方面和提高计算速度方面具有显著的优越性。 Based on the Eulerian-Lagrangian co-ordinate method, the alternating direction method and the finite element method, this paper proposes an Alternating-Direction Finite Element Method (ADCG) for solving two-dimensional saturated-unsaturated solute transport problems. The calculation example shows that the advantages of these three solutions of ADCG set have significant advantages in overcoming numerical dispersion and numerical fluctuations and in increasing computational speed.