| Institute of Karst Geology, Chinese Academy of Geological Sciences | Host |
| Citation: |
DU Wenyue, HE Ruoxue, HE Shiyi, SUN Ping'an, MO Jianying, Qin Xinxing, Yu Shi. Variation of hydrochemical characteristics and the ion source in the upstream of Guijiang river:A case study in Guilin section[J]. Carsologica Sinica, 2017, (2): 207-214. doi: 10.11932/karst20170208
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Variation of hydrochemical characteristics and the ion source in the upstream of Guijiang river:A case study in Guilin section
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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. -
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DU Wenyue, HE Ruoxue, HE Shiyi, SUN Ping'an, MO Jianying, Qin Xinxing, Yu Shi. Variation of hydrochemical characteristics and the ion source in the upstream of Guijiang river:A case study in Guilin section[J]. Carsologica Sinica, 2017, (2): 207-214. doi: 10.11932/karst20170208
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