土壤水-盐运移规律数值模拟研究综述

Review on Numerical Models of Transfer Between Soil Water and Salt

土壤水是联系地表水与地下水的纽带,在水资源的形成、转化及消耗过程中有着重要作用,与农业、水文、环境等领域都有密切联系,所以对土壤水盐运移机制的深入认识,有助于推求模拟土壤水盐运移过程中简单而适用的数学模型,对盐碱地的开发利用有一定的指导意义.讨论了土壤水分运动基本方程、土壤盐分运移基本方程以及可用于模拟土壤水盐运移规律的数值方法——有限差分法、有限元法、特征线法和有限体积法,并比较了有限差分法和有限元法.

Soil water is a linkage of surface water and groundwater. It is of great significance in formation, transformation and consumption of the water resources, which closely relates to agriculture, hydrology and environment etc. So study on the processes of transfer between the soil water and salt contributes to develop simple and applicable mathematic models to guide utilization of the saline-alkali soil. In this paper, three numerical models to simulate process of transfer between the soil water and salt are compared and discussed, which are finite volume model, finite differential model and finite element model.