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2007年5-10月,对纳木错曲嘎切流域上、下游水文过程进行观测,初步分析了曲嘎切流域冰川径流变化的特征.结果表明:2007年扎当冰川消融期径流主要集中在7-8月,该时段的径流在上、下游分别占整个消融期的69.0%和49.4%;径流在消融期前后日变化不明显,消融期出现明显的冰川融水峰值.2007年5-10月流域上、下游径流深度为1 302.5 mm和855.3 mm,流域径流模数为57.5 L.s-1.km-2.径流与气温和降水的多元回归分析表明,气温对上、下游径流的变化起主导作用,但上游因冰川面积所占比例较大,气温的主导作用则更加显著.
From May to October in 2007, the hydrological processes at the upper and lower reaches of the Quqaachec catchment in the Namco fault were observed, and the characteristics of the glacial runoff in the Quqache watershed were analyzed preliminarily. The results show that the runoff during the glacier ablation in 2007 was mainly in the 7- In August, the runoff in this period accounted for 69.0% and 49.4% of the total ablation period respectively in the upper and lower reaches, and the daily variation of runoff before and after ablation period was insignificant, with significant glacial meltwater peak during ablation period. The runoff depths at the upper and lower reaches were 1 302.5 mm and 855.3 mm, respectively, and the runoff modulus was 57.5 Ls-1.km-2.Multiple regression analysis of runoff and air temperature and precipitation showed that the temperature played a leading role in the runoff changes in the upper and lower reaches, However, due to the large proportion of glacier area in the upper reaches, the leading role of temperature is more significant.