2004—2009年阿克苏地区积雪分布特征及其对春季径流的影响

Distribution Characteristics of Snow Cover and Its Effect on Spring-Runoff in Akesu Region during 2004-2009

利用2004—2009年EOS/MODIS卫星遥感积雪资料,分析了阿克苏地区积雪的时空分布特征以及冬季积雪对流域春季径流的影响。结果表明：阿克苏地区积雪属低盖度季节性积雪,积雪主要分布在北部山区,山区中段积雪较厚,冬季1~10 cm积雪面积增加明显。前冬11~20 cm积雪对托什干河春季径流的影响显著,对库马拉克河春季径流的作用不明显。

Base on EOS/MODIS satellite data from 2004 to 2009,the spatial and temporal distribution characteristics of snow cover in Akesu region,the impact of synoptic process on snow coverage and the impact of snow coverage on the runoff of Aksu River in spring were analyzed.The results showed that： the snow cover in Akesu Region is seasonal with low cover degree.Snow cover mainly lies in north mountain region and in the middle section of mountain with thick snow cover.The snow cover depth below 10cm increases obviously in winter.The snow cover depth during 11~20 cm in early winter can affect markedly spring runoff of Tuoshigan River and the snow cover in early winter less affect in Kumalake River in spring.