天山北坡融雪期季节性冻土融化过程分析

发布时间：2018-06-16 15:46

本文选题：融雪期 + 季节性冻土　；参考：《干旱区研究》2017年02期

【摘要】：利用军塘湖河流域典型试验场2013年11月至2014年3月整个冻结融化期野外观测的季节性冻土温度和水分数据,对融雪期该地区季节性冻土的融化过程和特点进行了分析,研究了融雪期土壤在融化过程中各土壤层的时间与垂直温度和水分的变化,并探讨了融雪期季节性冻土的水文效应。结果表明:1季节性冻土的融化过程可以分为融雪前期、融雪中期和融雪后期3个阶段;2融雪期季节性冻土的温度呈阶段性变化,随着土壤深度的增加,大气温度对土壤温度的影响越小,且存在明显的滞后性;3土壤的水分含量在融雪中期才有所提升,季节性冻土从上下2个方向融解;4融雪中后期的积雪液态含水率对土壤水热状况的影响显著,整个融雪期积雪密度对土壤水热状况影响较小;5季节性冻土的冻融过程对春季融雪径流有着十分重要的影响。
[Abstract]:The melting process and characteristics of seasonal frozen soil in the snow melting period were analyzed by using the data of the seasonal frozen soil temperature and moisture in the whole freezing thawing period from November 2013 to March 2014, and the time and vertical temperature and water of each soil layer during the melting period of the snow melting period were studied. The hydrological effect of the seasonal frozen soil during the snowmelt period was discussed. The results showed that the melting process of the 1 seasonal frozen soil could be divided into 3 stages, the early snowmelt period, the middle period of snow melting and the late snowmelt period, and the temperature of the seasonal frozen soil during the 2 snowmelt period showed a phased change, and the effect of the atmospheric temperature on the soil temperature was smaller with the increase of soil depth. There is a significant lag in the water content of 3 Soil in the middle of snowmelt, and the seasonal frozen soil melts from 2 directions. 4 the liquid water content of snow in the late period of melting snow has a significant influence on the water and heat condition of the soil, and the snow density of the whole snowmelt period has little effect on the soil water and heat condition; and the freezing thawing process of 5 seasonal frozen soil is on spring. Snowmelt runoff has a very important impact.
【作者单位】：新疆大学资源与环境科学学院;新疆大学教育部绿洲生态重点实验室;新疆大学干旱生态环境研究所;新疆环境保护科学研究院新疆环境污染监控与风险预警重点实验室;
【基金】：国家自然科学基金面上项目(41171023);国家自然科学基金重点项目(41130531)
【分类号】：P642.14

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