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Article Navigation >  CARSOLOGICA SINICA  > 2026  > Accepted Manuscript
HUANG Hancheng, ZHANG Yuecan, CHEN Yubin, ZHANG Ling, WANG Ying, XU Xiaoyu, LIU Yuanfeng. Hydrochemical Characteristics and Evolution Mechanisms of Groundwater Reserve Areas in the Karst Region of Guangdong Province[J]. CARSOLOGICA SINICA. doi: 10.11932/karst2026y037
Citation: HUANG Hancheng, ZHANG Yuecan, CHEN Yubin, ZHANG Ling, WANG Ying, XU Xiaoyu, LIU Yuanfeng. Hydrochemical Characteristics and Evolution Mechanisms of Groundwater Reserve Areas in the Karst Region of Guangdong Province[J]. CARSOLOGICA SINICA. doi: 10.11932/karst2026y037
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Hydrochemical Characteristics and Evolution Mechanisms of Groundwater Reserve Areas in the Karst Region of Guangdong Province

doi: 10.11932/karst2026y037
  • 1.

    Guangdong Provincial Center for Hydrogeology and Environmental Geology Survey, Guangzhou, 510080

  • 2.

    Guangdong Provincial Geological Environment Monitoring Station, Guangzhou, 510510

  • Received Date: 2026-03-20
  • Accepted Date: 2026-09-20
  • Rev Recd Date: 2026-09-07
    • Available Online: 2026-10-15
    Abstract
  • The screening of groundwater reserves in karst regions is a critical step for the rational development of water resources within such areas; its accurate implementation depends on a deep understanding of the coupled multi-factor mechanisms. This study focuses on the strategic groundwater reserve zones of Bitou, Zhoubei, and Jiangwei in Qingyuan City, as well as the Liantan reserve zone in Yunfu City. Through hydrogeological surveys, hydrogeochemical analyses, and isotopic sample testing (δD, δ18O), combined with methodologies and techniques such as the Piper three-line diagram, Gibbs diagram, and ion ratio method, this study conducts a systematic investigation into the hydrochemical characteristics and evolution mechanisms of groundwater in the carbonate rock groundwater strategic reserve zones of Guangdong Province. The results indicate that the water bodies within these areas are weakly alkaline and exhibit low mineralization levels; their hydrochemical type is predominantly HCO3−Ca (Mg) type. The hydrochemical composition is primarily controlled by water−rock interactions: the contribution of calcite dissolution to groundwater amounts to 73.33%,2.67%, and 24.00%, respectively; for surface water, these values are 80.00%,4.00%, and 16.00%, respectively. In the Liantan area, due to the widespread exposure of dolomite, 78.9% of the groundwater samples are influenced by dolomite dissolution. Hydrogen and oxygen isotopes indicate that atmospheric precipitation serves as the primary recharge source; the average deuterium surplus of surface water in Zhoubei and Jiangwei (northern Guangdong) is 7.2‰ and 5.5‰, respectively, reflecting intense evaporation fractionation; in contrast, the deuterium surplus of surface water in Liantan (western Guangdong) reaches 11.7‰, indicating a minimal influence of evaporation. Overall, carbonate rock dissolution and atmospheric precipitation recharge constitute the core mechanisms governing the hydrochemical evolution of groundwater in this region. These findings provide a scientific basis for identifying suitable groundwater strategic reserve zones within this area.

     

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