doi:10.12202/j.0476-0301.2020059王永琦^{1, 2,},
苏小四^{1, 2},
吕航^{3, 4,,},
高佳祥³
1.吉林大学水资源与环境研究所，130021，吉林长春
2.吉林大学建设工程学院，130021，吉林长春
3.吉林大学新能源与环境学院，130021，吉林长春
4.北京师范大学水科学研究院，100875，北京
基金项目:中国博士后科学基金资助项目（2015M570963）；吉林省科技发展计划资助项目（20180520094JH）

详细信息

通讯作者:吕航（1985—），男，副教授，博士. 研究方向：地表水-地下水相互作用、水文地球化学. e-mail: lvhangmail@163.com

中图分类号:X523

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出版历程

收稿日期:2019-10-30
网络出版日期:2020-07-29
刊出日期:2020-04-01

Freeze-thaw effect on soil water migration and groundwater level fluctuation

Yongqi WANG^{1, 2,},
Xiaosi SU^{1, 2},
Hang LV^{3, 4,,},
Jiaxiang GAO³
1. Institute of Water Resources and Environment, Jilin University, 130026, Changchun, Jilin,China
2. College of Construction Engineering, Jilin University, 130026, Changchun, Jilin,China
3. College of New Energy and Environment, Jilin University, 130026, Changchun, Jilin,China
4. College of Water Sciences, Beijing Normal University, 100875, Beijing ,China



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摘要
摘要:相比于非冻土分布区，季节性冻土区冬春季节的冻融作用显著影响着土壤水分运动和地下水位动态，进而改变地下水土环境中的水力条件和污染物分布特征。针对冻融作用下地下水位的波动过程尚缺乏定量化的具体研究，本文首次建立包气带、含水层水分迁移过程的冻融循环模拟实验装置，定量模拟分析了不同介质粒径和不同温度条件下冻融过程造成的水位波动差异，揭示冻融作用下土壤水分迁移和地下水位的波动规律。结果表明：冻融过程地下水位变化阶段与土壤冻融阶段相对应，且存在滞后现象；土壤的介质条件和温度条件均对冻融过程中地下水的波动具有重要影响，粒径越细，温度梯度越大，水分迁移量越大，水位波动越显著。
关键词:季节性冻土/
冻融/
含水层/
土壤水分迁移/
地下水位波动
Abstract:Different from areas of non-frozen soil, seasonal freezing and thawing of soil significantly affects soil water movement and groundwater level dynamics, resulting in altered hydraulic conditions and pollutant distribution characteristics in groundwater and soil environment. Specific quantifications in the fluctuation process of groundwater levels under freeze-thaw conditions have not been performed before. Therefore in the present work we established a device to simulate freeze-thaw cycle for moisture migration in aerated zones and aquifers, to quantitatively analyze different particle sizes and different temperature conditions. Differences in water level fluctuation due to freezing and thawing process indicated that freezing and thawing had direct effects on soil water migration and groundwater levels. Changes in groundwater levels in the freeze-thaw process corresponded to freeze-thaw stage of soil, and hysteresis was observed. Soil media conditions and temperature conditions were found to have marked effect on fluctuations in groundwater during freeze-thaw process. With larger amount of water migration, the water level fluctuations become more significant.
Key words:seasonal frozen soil/
freeze-thaw/
aquifer/
soil water migration/
groundwater level fluctuation