The Study of Moisture Characteristics and Numerical Simulation in Seasonal Frozen Soil under the Stable Snow Cover
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Abstract:
For an in-depth study on the soil moisture transfer law of snow-covered boundary conditions, a moisture transfer model of seasonal frozen soil under the stable snow-covered condition was established ,which through the observed experiments of the winter soil moisture and using the soil hydrodynamics theory. The study result shows that: the average temperature of soil which covered with snow is 1℃ higher than the bare and the water content of unit volume (soil profile is 0cm to 100cm) is 2% higher. It reflects that the covered snow can not only prevent the loss of soil heat, but also maintain the soil moisture content. The model can accurately simulate the transfer dynamics of frozen soil under the snow cover. The relative average inaccuracy is just 3.51%.The research result has important theoretical and practical significance to rich and perfect the frozen soil moisture transfer theory and solved the spring drought and “cold drawing” of winter wheat and so on.
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