Abstract
The purpose of this study is to develop a 2-D soil model for heat and water transfer in permafrost regions.It was suggested by the field observation on the Tibetan Plateau that the local topography affects considerably the distribution of soil moisture and temperature and the active layer depth, that is, the lower soil temperature, the higher soil moisture and the more shallow active layer at the bottom of the slope. To incorporate the effect of horizontal soil water movement on vertical heat and water transfer in permafrost regions, a 2-D permafrost model is developed in this study. The numerical simulation by using the proposed 2-D model shows that the model can express the adequate distributions of soil moisture and active layer depth which correspond to the observed ones qualitatively.
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