中文摘要：

本文运用从TDR数据估算得到的液态水分量分析了内蒙古河套灌区土壤的冻融行进过程。根据液态水分量的变化,将冻土层区分为＂完全冻结层＂和＂部分冻结层＂。一方面,完全冻结层保持着0.05～0.1cm3cm-3的液态水分量垂直向下推进,而在其下方30～40cm厚的土壤为部分冻结土层,液态水分量出现了由0.1cm3cm-3到0.35～0.4cm3cm-3的剧烈变化,这部分土层随着时间的推移平行向下方推进的趋势。融解过程的速度要比冻结过程大得多。分析结果表明,部分冻结层在4月末到5月初,深度为70cm～90cm的剖面依然存在。

英文摘要：

Based on the distribution of liquid water content in freezing process the frozen soils were classified into completely and partially frozen zone.The completely frozen zone contained unfrozen water content of 0.05~0.1cm3cm-3.It developed downward vertically.The unfrozen water content changed abruptly from 0.1cm3cm-3 to 0.35~0.4cm3cm-3 in the partially frozen zone with a thickness of 30~40cm below the completely frozen zone.It developed downward with a similar behavior.The investigation showed that the thawing speed is larger than freezing velocity.The partially frozen zones still existed in the period from the end of April to the beginning of May in the depth of 70~90cm.