NDLI: Hydrogeochemical characteristics and associated mechanism based on groundwater dating in a karstic basin, Guizhou Province, China

Content Provider	Springer Nature Link
Author	Han, Zhiwei Tang, Changyuan Wu, Pan Zhang, Ruixue Zhang, Chipeng Sun, Jing
Copyright Year	2014
Abstract	Multiple tracers were used to assess the spatial distribution of hydrogeochemistry and its kinetic process in a typical karst basin in Guizhou Province, China. The groundwater apparent age in study area is from 26 to 37.5 years based on CFC-113 (trichlorotrifluoroethane, C$_{2}$F$_{3}$Cl$_{3}$). Based on the characteristics of major ions and the SI values of minerals in groundwater, the rise in the Ca$^{2+}$ and SO$_{4}$ $^{2−}$ with the increasing groundwater age is mainly controlled by natural water–rock interaction; however, the Mg$^{2+}$ and HCO$_{3}$ $^{−}$ of groundwater should be supplied more by contamination processes than the interaction between water and rocks. The change of major ions in the main stream compared with the groundwater was attributed to the change of the partial pressure of CO$_{2}$ and varied ratio of groundwater discharge to the total stream flow, which was estimated to range from 35 to 80 %. Land use can be considered as the dominant factor that affects the temporal changes of NO$_{3}$ $^{−}$, Cl$^{−}$, Na$^{+}$ and K$^{+}$ in groundwater which have increased since the 1970s. From the viewpoint of residence time, the concentration of these ions in springs and groundwater will continue for decades even if the fertilizer application is under control in a reasonable level from now on.
Starting Page	67
Ending Page	76
Page Count	10
File Format	PDF
ISSN	18666280
Journal	Environmental Earth Sciences
Volume Number	73
Issue Number	1
e-ISSN	18666299
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-06-27
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Hydrogeochemistry Groundwater apparent age Carbonate rocks Karst Anthropogenic activities Geology Hydrology/Water Resources Geochemistry Environmental Science and Engineering Terrestrial Pollution Biogeosciences
Content Type	Text
Resource Type	Article
Subject	Global and Planetary Change Earth-Surface Processes Soil Science Environmental Chemistry Pollution Geology Water Science and Technology

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