粘性土壤溶质运移新模型的应用

Applications of a New Model to Simulating Water Flow and Solute Transport in Clayey Soil

将Ｍｏｌｄｒｕｐ等提出的模拟水流和溶质运移的运动平均斜率模型和运动浓度斜率模型联合，模拟了重粘土在入渗和蒸发条件下的水盐动态并与特征－有限差分数值模型的计算结果进行了比较。在模拟过程中新模型显示出更加高效的优点，这对粘性土壤地区盐渍化趋势的长期预报具有重要的实际意义。

In this study, the moving mean slope (MMS) model and the moving concentration slope (MCS) model presented by Moldrup et al. for vertical, unsaturated water flow and solute transport are applied to simulate the variation of moisture and solute under infiltration and evaporation in high clayey soil. Compared with the finite difference method combined with charateristic (CFD), the computational results shaw that the new model has the advantage of more efficiency. It is of great importance to predict the long dynamics of salt content in a saline region.