中文摘要：

通过一维水平土柱入渗模拟试验,研究了不同质量浓度钠盐溶液下红壤水分运移特征,并确定了水力参数。结果表明,Kostiakov模型可以很好地描述累积入渗量与时间的关系,且累积入渗量与钠盐质量浓度负相关;湿润锋与时间呈良好幂函数关系,湿润锋推进速度随钠盐质量浓度的增加而减慢,土柱中含水率和土壤扩散度有减小趋势;黏性红壤土水入渗特征在钠盐质量浓度5-10g/L之间存在拐点。

英文摘要：

Soil water migration properties and hydraulic parameters were determined under different sodium concentrations by one-dimensional horizontal soil column in red soil. Results showed that Kostiakov model could well fit the relationship of cumulative infiltration with time, and cumulative infiltration was negatively correlated with salt concentration. There was a good power function between wetting front depth and time. The wetting front velocity decreased with the increase of salt concentration. Water content in soil column and soil diffusivity tended to decrease. The inflection point of water infiltration characteristics appeared at salt solution concentration of 5-10 g/L in viscous soil.