并结合特征曲线方程，给出了土壤水分扩散率的表达式。
With the soil water characteristic curve, the expression of soil water diffusivity is also given in this paper.
因此，三次样条函数法是计算土壤水分扩散率的一种简便可行的方法。
Therefore, the method is a simple workable one for calculation of soil water diffusivity.
非饱和土壤水分扩散率是研究土壤水分运动规律必不可少的基本参数之一。
Unsaturated soil water diffusivity is a necessarily basal parameter to study soil water movement laws and quantificationally analyze soil water movement with method of mathematical simulation.
土壤容重、孔隙大小、孔隙类型及土壤颗粒组成中粘粒含量对土壤水分扩散率都有一定的影响。
Then, the bulk density, porosity, the type of pore and clay content in the soil affected the soil moisture diffusivity.
土壤容重、孔隙大小、孔隙类型及土壤颗粒组成中粘粒含量对土壤水分扩散率都有一定的影响。
Then, the bulk density, porosity, the type of pore and clay content in the soil affected the soil moisture diffusivity.
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