Application of inverse modeling in a study of the hydrogeochemical evolution of karst groundwater in the Jinci Spring region,northern China |
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| Authors: | Zhenxing Jia Hongfei Zang Philip Hobbs Xiuqing Zheng Yongxin Xu Kai Wang |
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| Institution: | 1.College of Water Resources Science and Engineering,Taiyuan University of Technology,Taiyuan,China;2.School of Water Conservancy,North China University of Water Resources and Electric Power,Zhengzhou,China;3.CSIR Natural Resources and the Environment,Pretoria,South Africa;4.Shanxi Institute of Water Resources,Taiyuan,China;5.Department of Earth Sciences,University of the Western Cape,Cape Town,South Africa |
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| Abstract: | This study explores the hydrogeochemical evolution of karst groundwater in the Jinci Spring region, Shanxi Province, northern China. During 2015, karst groundwater samples collected from 24 sampling points along several profiles that follow the groundwater flow direction were subjected to hydrochemical analysis. Reaction paths and mineral phases for the hydrogeochemical modeling were determined based on the analysis results and in conjunction with the regional geology and hydrogeology. The PHREEQC hydrogeochemical modeling software was used to perform mass balance and reaction path modeling of the hydrogeochemical evolution of the spring region. The modeling results showed that from the recharge area through the runoff area to the drainage area, the hydrogeochemical processes occurring in the karst water vary widely between the northeastern, central, and southwestern parts of the spring region, and across the piedmont discharge area. Additionally, hydrodynamic fields and geological structures were found to have significant control over the hydrogeochemical reactions occurring within the spring region’s karst groundwater. |
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