摘 要：
融雪期的土壤湿度是影响融雪径流的主要因子。基于2016年天山北坡军塘湖流域融雪期林地、林间草地和草地下垫面的土壤温湿度数据,利用相关性分析方法研究融雪期不同下垫面土壤湿度变化特征,结果表明:融雪期三种下垫面气温总体呈波动上升趋势;低海拔草地下垫面土壤湿度呈"双峰"状,中高海拔林间草地土壤湿度均成"单峰",中海拔林地土壤湿度呈现"三升三降,同深度三种下垫面的土壤湿度是:林地>林间草地>草地;三种下垫面土壤温度和土壤湿度相关性均达到显著性水平(P<0.01),草地和林间草地下垫面土壤湿度不仅受到对应层土壤温度的影响,还受到下层土壤温度的制约,林地下垫面的土壤湿度除受到对应层和下层土壤温度的影响之外,还受到更深层次40 cm土壤温度的制约;从融雪期土壤湿度的垂深变化来看:草地下层土壤湿度自表层向下呈减小趋势,而林地呈增加趋势,林间草地浅层土壤湿度波动幅度大于深层。土壤湿度与土壤温度变化关系密切,且下垫面不同,其相关性也有所不同。不同下垫面土壤湿度的变化研究,对提高融雪径流模型中土壤湿度参数化、融雪洪水模拟和提高洪水预报精度有着重要意义。
译 名：
Study on Variation of Soil Moisture in Underlying Surface of Snowmelt in North of Tianshan Mountain
作 者：
DUAN Bin-bin;LI Cheng-zhi;LIU Zhi-hui;Institute of Arid Ecology and Environment,Xinjiang University;Key Laboratory of Oasis Ecology,Ministry of Education;College of Resources and Environmental Science,Xinjiang University;
关键词：
meltingsnow;;under the surface;;soil moisture;;north slope of Tian Shan Mountain
摘 要：
The soil moisture in the snow-melting stage is the main factor that influences the runoff of melting snow.Based on the data of soil temperature and moisture on three underlying surfaces in the Juntang Lake basin on the north slope of Tianshan mountain in 2016,correlation analysis was used to study the changes in soil moisture on different underlying surfaces during the snow-melting period. The results showed that in the snow-melting stage the temperature on the three underlying surfaces showed an overall trend of fluctuating rise; the soil moisture at the lower elevations was in the shape of "double peaks"; the soil moisture on the grassland in forest at the middle-high elevations was in the shape of "single peak"; the soil moisture on the high-elevation forest land showed a trend of "three rises and three drops"; the soil moisture on the three underlying surfaceswas in the order of that on the forestland>that on the grassland in forest>that on the grassland; the correlation between soil temperature and soil moisture of the three underlying surfaces reached a significant level( P < 0.01); the soil moisture on the grassland and the grassland in forest was not only affected by the soil temperature at the corresponding lays,but also constrained by the soil temperature at the lower layers,the soil moisture on the forest underlying surface was affected by the soil temperature at the corresponding layers and the lower-layer soil temperature and constrained by the soil temperature at a deeper level of 40 cm; from the perspective of the vertical-depth changes in the soil moisture in the snow-melting stage,the soil moisture at the lower layers of the grassland showed a trend of decrease from the surface to the depth,but that on the forest land showed an increasing trend,the shallow soil moisture on the grassland in forest fluctuated in a larger range than the deep soil moisture.Soil moisture is closely related with changes in soil temperature,and the relevance is different among underlying surface.The research on the changes in the moisture on different underlying surface is of great significance to the improvement of the model of melting snow runoff,to the simulatetion of melting snow flood and its prediction accuracy.
