土壤导水参数的温度效应及其数学模式

The temperature effect of hydraulic parameters of unsaturated soil and its mathematical model

本文对非饱和土壤导水参数包括土壤水分特征曲线ｈ（θ），土壤水分扩散率Ｄ（θ）及土壤非饱和导水率Ｋ（θ）的温度效应进行了定量研究，在此基础上应用表面张力──粘滞流理论（ＳＴＶＦ），Ｇ（θ）因子函数及Ｐｈｉｌｉｐ扩散理论对其温度效应的机理进行了分析。

The temperature effect of hydraulic parameters of unsaturated soil including soil water characteristic curve h(θ),water diffusivity D(θ) and hydraulic conductivity K(θ)are studied quantitatively in this paper. The mechanism of the temperature effect has been analysed by using surface tension-viscous flow(STVF) model, the empirical Gain factor and Philip diffusion theory. The data resulted from the model is compared with the experimental test.