Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun, 130021, China.
Jilin Provincial Key Laboratory of Water Resources and Environment, Jilin University, Changchun, 130021, China.
Environ Monit Assess. 2019 Feb 9;191(3):151. doi: 10.1007/s10661-019-7285-7.
The effect of spring snowmelt infiltration in a seasonal soil frost area on groundwater recharge was evaluated by systematically monitoring meteorological factors, soil temperature and humidity, groundwater table and temperature, electrical conductivity, and the value of δO in a small field site over a 2-year period. The variation of soil temperature and humidity, groundwater table during the freezing period, and the snowmelt period respectively, as well as their correspondence to the relevant environmental factors, and the influencing factors of the permeability of frozen layer were analyzed. The results showed that the evaluation of precipitation infiltration in seasonal soil frost areas should be divided into three stages: a non-freezing period, a freezing period, and a snowmelt period. Snow is the main form of precipitation during the freezing period, and groundwater cannot be recharged. During the snowmelt period of spring, the snow cover that accumulated during the freezing period infiltrates together with rainfall and has a significant effect on groundwater recharge. The general precipitation infiltration process occurs after the frozen soil thaws completely. These research results can improve the accuracy of groundwater recharge calculations for snowmelt infiltration in the seasonal soil frost area of Northeast China and provide a scientific basis for the evaluation and management of regional water resources.
通过系统监测小场地 2 年的气象因素、土壤温度和湿度、地下水位和温度、电导率和δO 值，评估了季节性土壤冻结区春季融雪入渗对地下水补给的影响。分析了冻结期和融雪期土壤温度和湿度、地下水位的变化及其与相关环境因素的对应关系，以及影响冻结层渗透性的因素。结果表明，对季节性土壤冻结区降水入渗的评价应分为非冻结期、冻结期和融雪期三个阶段。在冻结期，雪是主要的降水形式，地下水不能补给。在春季融雪期，冻结期积累的积雪与降雨一起渗透，对地下水补给有显著影响。一般的降水入渗过程发生在冻土完全融化之后。这些研究结果可以提高对中国东北季节性土壤冻结区融雪入渗地下水补给计算的准确性，为区域水资源评价和管理提供科学依据。
