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以湖南红壤和陕西塿土为试验土样,测定了不同容重条件下的Cl-的穿透曲线,并应用对流弥散溶质迁移模型和CXTFIT软件程序对实验数据进行拟合获得平均孔隙流速和水动力弥散系数.结果表明:随着容重的增大,Cl-的运移穿透转折点和平均穿透点的时间越长,平均孔隙流速呈幂函数递减,而水动力弥散系数以幂函数递增.容重变化对红壤中溶质运移的影响明显大于塿土.
Taking Hunan red soil and Shaanxi soil as test soil samples, the penetration curves of Cl- under different bulk density were measured and the experimental data were fitted by convection-diffusion solute transport model and CXTFIT software program to obtain the average pore velocity and hydrodynamic The results show that with the increase of the bulk density, the longer the penetration of Cl- penetrates the turning point and the average penetration point, the smaller the average pore velocity is the power function, while the hydrodynamic dispersion coefficient increases with the power function. The effect of change on solute transport in red soil was obviously greater than that of soil.