中文摘要：

积雪含水率是干旱区季节性积雪出流的重要条件。描述了融雪期干旱区季节性积雪含水率的变化,利用数理统计方法分析了影响因素,并采用多元统计模型进行模拟。结果表明：1）融雪期干旱区季节性积雪含水率变化范围在0-8%之间。积雪含水率融雪前期变化较小,在0-1%之间,融雪后期变化幅度增加,在1-8%之间;2）融雪前期、后期积雪含水率大致从下层至上层依次减少,中期反之;3）气温是积雪含水率变化的主要影响因素,其具有滞后性。

英文摘要：

Snow moisture is an important condition for the snowmeh water flow of seasonal snow cover in arid area. This paper described changes of snow moisture during snowmeh period of seasonal snow cover in arid area, ana- lyzed influential factors using mathematical statistical method and simulated snow moisture changes with multiva- riate statistical regression model. The results showed that： （1） Snow moisture of seasonal snow in arid area changed between 0 -8%. Snow moisture had small changes by 0 -1% during the early snowmeh period, but had a sudden increase in the late snowmelt period with 1 -8 %. （2） It had been reducing from the lower to up- per layer of snow during the early and later snowmelt period, but turned increase in medium - term of snowmeh period. （3） The air temperature was the main influencing factors for the snow water content changes.