摘要
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.
During the field observation in the upper and lower reaches of Qugaqie Rivers,which locates in to the Nam Co,from May to October in 2007,mass balance and hydrological features of the Zhadang Glacier were investigated.It is found that July and August is the main ablation period,when the discharge accounts for 69.0% in the upper reaches and 49.4% in the lower reaches of the total to the Qugaqie River.Diurnal discharge variation is inconspicuous before and after ablation season,and there is conspicuous meltwater peak during the ablation season.The glacier meltwater runoff depth is 1 302.5 mm.The mean modulus is around 57.5 L·s-1·km-2.Using multivariable regression analysis,the relations between runoff,temperature and precipitation are established.During the ablation season,the runoff change is controlled greatly by air temperature both in the upper and lower reaches of the river.However,the runoff in the upper reaches is much more affected by the air temperature than that in the lower reaches of the river.
出处
《冰川冻土》
CSCD
北大核心
2009年第4期725-731,共7页
Journal of Glaciology and Geocryology
基金
国家科技部“973”项目(2005CB422004)
中国科学院重要方向项目(KZCX2-YW-145)
科技报基础性工作专项(2006FY110200)
欧盟第六框架项目(FP6-036952)
欧盟第七框架项目(212921)资助
关键词
纳木错
曲嘎切流域
扎当冰川
水文特征
青藏高原
hydrological features
Nam Co
Qugaqie Basin
Zhadang Glacier
Tibetan Plateau
