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融雪期,浅层土壤水热变化影响融雪水下渗及积雪产流过程,是融雪产流模拟及汇流计算的重要参数。本研究以天山北坡军塘湖流域为研究区,从积雪消融角度来分析浅层土壤水热变化情况,通过分析积雪消融期土壤剖面水分、温度的变化规律确定二者之间的定量关系。结果表明,气温对土壤温度的影响随着土壤深度增加减弱,积雪越厚,土壤温度越高;土壤水分受地温影响较大,雪水入渗能在一定程度上补给土壤水,但消融后期剧烈的蒸发引起土壤表层10cm内水分损失较多。阴阳坡土壤水分均随时间呈中等变异(除阳坡60cm),在30-60cm土壤层土壤水热间表现出显著的相关性。此结果为该区域农业生产、春季融雪洪水预警进一步研究提供参考。
During the snowmelt period, the shallow soil hydrothermal changes affect the snowmelt infiltration and snow runoff process, which is an important parameter for snowmelt runoff simulation and confluence calculation. In this study, we studied the water and heat changes of shallow soil from the perspective of snow melting in the study area of Juntang Lake basin on the northern slope of Tianshan Mountain, and determined the quantitative relationship between soil moisture and temperature by analyzing the variation law of soil moisture and temperature during snow melting period relationship. The results showed that the influence of air temperature on soil temperature decreased with the increase of soil depth, the thicker the snow was, the higher the soil temperature was, and the soil water was more affected by the ground temperature. The snow infiltration could replenish soil water to a certain extent, Evaporation caused by evaporation of water within the soil surface 10cm more loss. The soil moisture in both Yin and Yang slope showed medium variation with time (except the sunny slope of 60cm), and showed significant correlation between soil water and heat in the soil layer of 30-60cm. The results provide reference for further research on agricultural production and snowmelt flood warning in the region.