和田河流域山区积雪覆盖时空变化规律研究  

Research on the Spatiotemporal Variation of Snow Cover in the Mountainous Areas over Hotan River Basin

作　　者：薛强 吕继强[1,2] 罗平平[1,2] 刘俊 聂启阳 沈冰 韩波 XUE Qiang;LU Ji-qiang;LUO Ping-ping;LIU Jun;NIE Qi-yang;SHEN Bing;HAN Bo(School of Environment Science and Engineering,Chang'an University,Xi'an 710054,China;Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Regions,Ministry of Education,Xi'an 710054,China;River Engineering and Technology Research Center of Shaanxi Province,Xi'an 710016,China;State Key Laboratory of Eco-Hydraulic in Arid Area,Xi'an University of Technology,Xi'an 710048,China;Administration Committee of Xi'an Chanba Ecological District 710024,Xi'an 710024,China)

机构地区：[1]长安大学环境科学与工程学院,西安710054 [2]长安大学旱区地下水文与生态效应教育部重点实验室,陕西西安710054 [3]陕西省河流工程技术研究中心,西安710016 [4]西安理工大学西北旱区生态水利工程国家重点实验室,陕西西安710048 [5]西安浐灞生态区管理委员会,西安710024

出　　处：《中国农村水利水电》2020年第1期88-96,共9页China Rural Water and Hydropower

基　　金：国家自然科学基金面上项目(51679185,51509203);长安大学中央高校基本科研业务费专项资金(300102299102)。

摘　　要：利用2007-2017年MOD10A2积雪产品数据与数字高程、气象数据结合,分析地形、气象因素对新疆和田河流域山区积雪覆盖的影响。结果表明:积雪覆盖率时空变化受高程影响,在海拔3500 m以下区域,年内变化逐渐呈现出由“U”型向“V”型的过渡。海拔3500~5500 m的中高区域,积雪年内变化呈现“消融-积雪-消融-积雪”的二次过程;从不同坡度带积雪覆盖率差异较为明显,其中12.4°~19.5°带的平均积雪覆盖率为68.68%,0°~5.3°带的积雪覆盖率最高仅为28.01%;不同坡向带的积雪覆盖率最大为东坡带,近11 a平均积雪覆盖率为60%。积雪覆盖率随坡度、坡向及高程变化趋势相仿;受年内气象条件变化影响,年内最大积雪覆盖率常出现在2月和3月,且最大为76.9%。和田河流域积雪覆盖率与气温变化紧密相关。By using the data of MOD10A2 snow cover from 2007 to 2017,combined with digital elevation model and meteorological data,the influence of topographic and meteorological factors on snow cover in the mountainous area of Hotan River Basin in Xinjiang is analyzed.The results show that the spatial and temporal variation of snow cove is affected by elevation.3500 meters below the basin,the annual snow cover fraction gradually shifts from“U”to“V”type.In the middle and high areas with an altitude of 3500~5500m,the variation of snow during the inner-annual shows the secondary process of“ablation,increase,ablation,increase”.The difference of snow cover from different slope band is obvious,and the average of 12.4°~19.5°The snow cover rate is 68.68%,the snow cover rate in the 0°~5.3°zone is only 28.01%,and the snow cover in the different slope zone is the east slope zone.The average snow coverage rate in the last eleven years is 60%.Snow cover coverage is similar to slope,aspect and elevation.Due to changes in meteorological conditions during the year,the maximum snow coverage during the year often occurs in February and March,with a maximum of 76.9%.Snow cover in the Hotan River Basin is closely related to temperature changes.

关 键 词：和田河 MOD10A2 年内变化 积雪覆盖率 气象因子 

分 类 号：TV121.6[水利工程—水文学及水资源] P426.635[天文地球—大气科学及气象学]