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Hydrochemical Characteristics and Solute Dynamics of Meltwater Runoff of Urumqi Glacier No.1,Eastern Tianshan,Northwest China

查看全文 作　　者：FENG [1,2]Fang;LI [1,2]Zhongqin;JIN [1]Shuang;DONG [1]Zhiwen;WANG [1,2]Feiteng 高影响力作者 机构地区：[1]State Key Laboratory ofCryosphere Sciences/Tianshan Glaciological Station,Cold andArid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou 730000,Gansu,China.;[2]College of Geography and Environmental Science,Northwest Normal University,Lanzhou 730070,Gansu,China高影响力机构 出　　处：《Journal of Mountain Science》索引2012年第9卷第4期,共11页高影响力期刊 基　　金：supported by the Knowledge Innovation Project of the Chinese Academy of Sciences(KZCX2-EW-311);the National Natural Science Foundation of China(Nos. 91025012,40701034,J0630966/J0109, 40701035);the SKLCS founding(SKLCS-ZZ-201004,SKLCS-ZZ-2012-01-01);the Foundation for Excellent Youth Scholars of CAREERI,Chinese Academy of Sciences(Y184C81001) 摘　　要：Hydrochemical characteristics and solute dynamics of bulk meltwater draining from Urumqi Glacier No.1 were investigated in years 2006 and 2007.The glacial meltwater was slightly alkaline with the mean pH of 7.64 and 7.61 in 2006 and 2007,respectively.In the meltwater,the dominant anions were the bicarbonate and sulphate,and the dominant cation was calcium.The concentration of major cations were varied as c(Ca2+) > c(Mg2+) > c(K+) > c(Na+),while the order for the cations was c(HCO3) > c(SO42) > c(NO3) > c(Cl).The total dissolved solids(TDS) in meltwater had inverse relationships with the diurnal discharge.The major ion composition of meltwater was mainly controlled by rock weathering as inferred from the Gibbs model.Furthermore,the ion ratios and Piper diagram indicated that the main processes controlling the meltwater chemistry were carbonate weathering,pyrite weathering and feldspar weathering in rocks,and Ca2+ and HCO3 were the dominant ions during the carbonate weathering process.Solute flux calculation at Glacier No.1 station suggested that chemical denudation rates were 11.46 and 13.90 ton.km 2.yr 1 in 2006 and 2007,respectively. 关 键 词：水化学特征 冰川融水 溶质通量 乌鲁木齐 中国西北 动力学 特征和 东天山
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