干旱区研究2017，Vol.34Issue(4)：881-888,8.DOI:10.13866/j.azr.2017.04.22
天山冰川区山溪河水化学成分变化过程分析
Changing Process of Hydrochemical Composition in Stream in Glacier Area, the Tianshan Mountains
摘要
Abstract
In the investigation on Pilose Antler Glacier in the west Manas River Basin in middle northern slope of the Tianshan Mountains in August 2014,thirty water samples were collected from glacier-surface streams to the Danan Ditch Debouchure and other main rivers.A quantitative analysis on the variation of different ions and the affecting factors from glacier precipitation recharge source to the debouchure was carried out based on analyzing the relationship between the hydrogen and oxygen isotopes with Gibbs diagram analysis,hydrochemical Piper diagram analysis and correlation analysis.The results showed that river water in the mountainous area higher than 2 000 m a.s.l.was sweet fresh water with TDS lower than 100 mg · L-1.The river water was weakly alkaline,the pH value varied in a range of 6.92-7.86,and there was a good correlation between TDS and EC.The main anion and cation concentrations in river water were in orders of HCO3-＞ SO42-＞ NO3-＞ Cl-and Ca2+ ＞ Na+ ＞ Mg2+ ＞K+.The ion concentration in water was slowly increased downstream,and the change process was different from different ions.Such difference was mainly caused by the petrographic composition of riverbed rock and the complex interactions between ions.The effects of the affecting factors was in an order of water-rock interaction ＞ precipitation contribution ＞ concentration by evaporation.The contribution of sulfate rock was high,especially to SO42-increase,and the water chemical type was converted from HCO3--Ca2+ to (HCO3-,SO42-)-Ca2+ The Cl-,Na +,Mg2+ and K + concentrations were affected by hydrochemical interaction.NO3-came mainly from human activities and natural biological function,and F-was mainly derived from rock.关键词
山溪河水/冰川区/水化学特征/变化过程/玛纳斯河流域Key words
mountain stream/glacier area/hydrochemical property/process analysis/Manas River Basin引用本文复制引用
何正强,李忠勤,陈天乐,胡立安,杨继帅..天山冰川区山溪河水化学成分变化过程分析[J].干旱区研究,2017,34(4):881-888,8.基金项目
兰州大学地理基地科研训练及科研能力提高项目(J1210065)资助 （J1210065）
