Journal
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
Volume 325, Issue 2, Pages 365-379Publisher
SPRINGER
DOI: 10.1007/s10967-020-07247-w
Keywords
Hydrogeochemical characteristics; A closed karst groundwater basin; Carbonates dissolution; Human activities; Weak evaporation
Funding
- National Natural Science Foundation of China [41702277]
- Foundation of Guangxi Province [2017GXNSFFA198006, 2018GXNSFDA050002, 2018-242-Z01, AD17129047]
- Special Fund for Basic Scientific Research of Chinese Academy of Geological Sciences [JYYWF20182002, 2020004]
- UNESCO/IUGS [IGCP 661]
- Global Karst Resource Ecology United laboratory-Comparative study of classical karst areas between China and Slovenia [KY201802009]
- national key research and development program of China [2016YFC0502306]
- Geological Survey Projects of CGS [DD20190022, DD20190452]
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Understanding the hydrogeochemical processes of carbonate aquifers is essential for utilizing local karst groundwater resources sustainability. Integrating hydrochemistry, environmental isotopes and hydrogeological conditions was used to study hydrogeochemical characteristics of a closed karst groundwater basin located in Shandong Province, North China. The dominant hydrochemistry type was HCO3-SO4-Ca in the karst groundwater system. Carbonates dissolution (especially calcite dissolution) as the main rock chemical weathering dominated the chemical compositions of the carbonate aquifers. Hydrogeochemical evolution processes of the closed karst groundwater basin were mainly carbonates dissolution accompanied with weak influences of human activities and weak evaporation during the recharging of atmospheric precipitation.
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