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《Journal of Glaciology and Geocryology》 1984-04
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Laboratory-Determined Parameters of Water Migration in Un-Saturated Soil

Shen Yanli (Irrigation Laboratory of Hydroulic-Engineering Department, Qinghua University) Wang Yaqing (Lanzhou Institute of Glociology and Geocryology, Academia Sinica)  
In order to study the mechamism of water migration in un-saturated soil during freezing experiments on the soil water characteristics, hydrulic conductivity K(θ) and diffusivity D(θ) were conducted with various soil,such as clay, clayey-loam, sandy- loam and very fine sand collected from Zhangye Frost Station, Gansu Province. The experimental methods are briefly described. Their soil water characteristics are given in Fig.l. The relationship between hydraulic conductivity K or diffusivity D and the degree of saturation G can be expressed by K = KSGβ (Fig.2) and D = DsGa (Fig. 4) respectively.
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