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当前位置: 首页 > 文章 > 积雪覆盖下的季节性冻土对融雪水出流的影响 干旱区研究 2015,32 (3) 435-441
Position: Home > Articles > Effect on Snowmelt Water Outflow of Snow-covered Seasonal Frozen Soil Arid Zone Research 2015,32 (3) 435-441

积雪覆盖下的季节性冻土对融雪水出流的影响

作  者：
魏天锋;刘志辉;王元
单  位：
新疆大学资源与环境科学学院
关键词：
融雪期;季节性冻土;融雪水;出流量;军塘湖流域;天山北坡
摘  要：
以天山北坡军塘湖流域为研究区,利用2012—2013年融雪期实测逐日积雪、冻土数据,分析季节性冻土的水热状体对融雪水出流的影响。结果表明:1 2012年融雪期30 cm以上季节性冻土的冻融变化经历了稳定冻结期、冻融交替变化期、无冻期3个阶段,其中10 cm季节性冻土稳定冻结期、无冻期分别占融雪期50%和40%。2以2012年、2013年融雪期起始积雪厚度分别为18 cm和30 cm为例,有季节性冻土存在条件下融雪水出流时间比没有季节性冻土存在提前2 d。3不同深度土壤日积温与融雪水出流量均呈负相关,且土壤剖面10 cm以上负相关性最大(R2=0.825)。4季节性冻土延缓了土壤液态水含量的增加速度,使融雪水最大出流提前到来。
译  名：
Effect on Snowmelt Water Outflow of Snow-covered Seasonal Frozen Soil
作  者：
WEI Tian-feng;LIU Zhi-hui;WANG Yuan;College of Resources and Environment Science,Xinjiang University;Key Laboratory of Ministry of Education ,Oasis Ecology,Xinjiang University;Institute of Arid Ecology and Environment,Xinjiang University;International Center for Desert Affairs-Research on Sustainable Development in Arid and Semi-arid Lands;
关键词：
snow melting period;;seasonal frozen soil;;snowmelt;;outflow;;Juntang Lake Basin;;the Northern Slope of Tianshan Mountains
摘  要：
In northwest arid region in China,snowmelt water is the main recharge source of runoff,and plays special significance to the local economy development and people's production and living. However,because of the existence of seasonal frozen soil,the snow melting process is uncertain,lead to the spring snowmelt floods occurring,affecting people's life and property safety seriously. So the study of seasonal frozen soil influence on snowmelt water discharge mechanism is of great significance in this area. In this paper,the data of daily snow and frozen soil actually measured from 2012 to 2013 in snow melting period was used to analyze the effect on the snowmelt outflow of the hydrothermal body of seasonal frozen soil. The results showed: Snow melting period in 2012,freezing and thawing changes of seasonal frozen soil above 30 cm experienced stable freeze period,freezing and thawing change alternately and freeze-free period,of which,stable of freeze period and freeze-free period of frozen soil above 10 cm reached 50 percent and 40 percent of snowmelt season,respectively. Take the initial snow depth of 18 cm and 30 cm in snow melting season of 2012 and 2013 for example,the time of snowmelt outflow with seasonal frozen soil appeared two days earlier than that without seasonal frozen soil. There was negative correlation relationship between the daily accumulated temperature at different depth of soil and snowmelt outflow,and the biggest negative correlation coefficient,above 10 cm of seasonal frozen soil,is about 0. 825. Seasonal frozen soil delayed the increasing speed of soil water content,leading to the largest snowmelt outflows coming ahead.

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