中国岩溶2017，Vol.36Issue(2)：207-214,8.DOI:10.11932/karst20170208
桂江上游水化学特征变化及离子来源分析——以桂林断面为例
Variation of hydrochemical characteristics and the ion source in the upstream of Guijiang river:A case study in Guilin section
摘要
Abstract
In order to discuss the hydrochemical composition variation and the source of dissolved ions in the upper stream Guijiang river,observations and sampling were undertaken in October 2013 to April 2015.The results show that the hydrochemistry type of Guilin section is of HCO3-Ca type.Ca2+ and HCO3 are the main cations and anions,which are mainly from the weathering of carbonate rocks in the basin.The concentration of ions is controlled by the river flow,which is higher in the winter while low in the summer.Meanwhile,the sulfate also takes part in the carbonate weathering in the basin.The hydrochemistry of Guijiang upstream is controlled by carbonate as well as silicate rocks,even though there is much limited carbonate rocks occur in the basin.Analysis of principal compositions shows that the contribution ratio of the first factor is 38.8％,well correlated with K+,Na+,Mg2+,Cl,SO24-and NO-3,representing the influence of human activity and precipitation on the water.And the contribution ratio of the second factor is 28.2％,including HCO3 and Ca2-,which indicates the solution of carbonate rocks.In addition,there is no significantly effective load indicator of the third factor.关键词
桂江上游/水化学特征/主成分分析/离子来源Key words
upstream of Guijiang river/hydrochemistry characteristics/principal component analysis/source of ions分类
天文与地球科学引用本文复制引用
杜文越,何若雪,何师意,孙平安,莫建英,覃新行,于奭..桂江上游水化学特征变化及离子来源分析——以桂林断面为例[J].中国岩溶,2017,36(2):207-214,8.基金项目
地质调查项目(121201237000160002,121201107000150003) （121201237000160002,121201107000150003）
国家自然科学基金(41402324,41402238) （41402324,41402238）
国家重点研发计划(2016YFC0502302) （2016YFC0502302）
广西自然科学基金(2014GXNSFBA118228) （2014GXNSFBA118228）
