论文部分内容阅读
在寒区,关于冻结层上包气带边界特征的分析一直备受人们关注。在充分梳理既有研究成果的基础上指出:冻结层上包气带一般指的是位于地表与冻结层上地下水之间岩层圈最顶部的地带;包气带的分类依据冻土和地貌条件划分;在包气带边界处,岩层中的孔隙气体会和大气圈进行交换;冻结层上包气带水分迁移的影响因素有水分饱和差和热梯度差。
In the cold area, the analysis of the characteristics of the aeolian zone on the frozen layer has drawn much attention. On the basis of fully reviewing the existing research results, it is pointed out that the gas-bearing zone on the frozen layer generally refers to the topmost zone of the lithosphere between the ground surface and the groundwater on the frozen layer. The classification of the gas-bearing zones is based on the conditions of the frozen soil and the topography At the zone boundary of the gas-bearing zone, the pore gas in the rock layer will exchange with the atmosphere. The influencing factors of moisture migration in the gas zone in the frozen layer are poor water saturation and thermal gradient.