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在室内使用特殊形状的土柱隔板成功地填装了在水平横截面上呈“川”字型分布、由质地相差较大的两种土壤相间构成的非均质土柱.当土柱出流达到稳态后,灌入CaC l2溶液,监测土柱出流液的浓度动态,通过计算表征氯离子迁移时间随机特征的概率密度函数,对出流盐分的优先运移采用传递函数模型进行仿真,并对构成非均质土柱的两种均质土壤分别进行了条件类似的水盐入渗实验和模拟.在此基础上获得了参与氯离子输运的土壤水运移体积和可动体积以及土壤溶液中氯离子的体积平均驻留浓度.
In the indoor use of special shape of soil column partition successfully filled in the horizontal cross-section was “Chuan ” font distribution, by the texture of two different soil between the phase heterogeneous soil column.When the soil After the column effluent reaches the steady state, CaC12 solution is poured into the column to monitor the concentration dynamics of effluent in the soil column. The probability density function of the random characteristic of the chloride ion migration time is calculated, and the transfer function model And simulate the water and salt infiltration of the two kinds of homogeneous soils that constitute the heterogeneous soil column under the similar conditions respectively.On the basis of this, we obtained the volume and the movement of soil water transport involved in chloride ion transport Volume and average concentration of chloride ions in soil solution.