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通过对淹灌条件下砂质壤土的盐水入渗试验，以传递函数模型作为数学模拟的工具，探讨了对流占优运移机制下土壤盐分的迁移特征，得到了盐分在４５ｃｍ土层的迁移时间概率分布函数与迁移时间概率密度函数及土壤盐分平均孔隙流速和水动力弥散系数，进行了盐分出流过程的数学模拟，同时对描述稳定流场中土壤盐分对流迁移特征的有关参量进行了初步分析。
Through the salt water infiltration test of sandy loam under flooded irrigation, the transfer function model was used as a mathematical simulation tool to study the migration characteristics of soil salinity under the action of convective dominant transport. The migration time of salinity in 45cm soil layer The probability distribution function, the probability density function of migration time, the mean pore water velocity and the hydrodynamic dispersion coefficient of soil salinity, the mathematical simulation of salt outflow process was carried out, and the parameters describing the characteristics of soil salt convection in stable flow field were also analyzed .