以甘肃省河西走廊石羊河流域为例,在78个土壤样品试验数据的基础上,建立了土壤水分特征曲线、土壤水分扩散率和土壤导水率的单一参数模型,并对模型中的参数特征进行了分析。研究表明,单一参数模型具有一定的拟合精度,模型中的唯一参数能够描述土壤水力参数曲线,可以作为描述这些参数空间变异的变异系数,是进行大尺度区域土壤水力参数空间变异研究中比较理想的模型。
The one-parameter models for soil hydraulic parameters were established based on experimental data of 78 soil samples in Shiyang River basin, Gansu Province, China. The characteristics of these parameters were analyzed. The results indicated that one-parameter models have high accuracy and can be used to describe the soil hydraulic parameter curves. The unique parameter of these models can be used as the variable coefficient to describe the spatial variability of soil hydraulic properties. They are useful in describing the spatial distribution of soil hydraulic parameters in basin scale.