Hydrogeochemical Characteristics and Genetic Analysis of Karst Groundwater in the Fengfeng Mining Area

Sun, Hui; Bian, Kai; Wang, Tieji; Jin, Zidong; Niu, Zhiqiang

doi:10.3390/w15234049

Cited by 3 publications

References 30 publications

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Cumulative effects of natural and anthropogenic processes on groundwater chemistry of a small karst island—case study of Vis (Croatia)

Patekar,

Briški,

Terzić

et al. 2024

Appl Water Sci

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Many coastal and island communities depend on groundwater as the only source of freshwater, making it an invaluable resource. In the Mediterranean region, groundwater resources are highly vulnerable to natural and anthropogenic pressures, such as overexploitation, climate change, seasonal variations in precipitation, and seawater intrusion. Hence, an understanding of hydrogeological processes and groundwater chemistry is a basis for the sustainable management of coastal and island groundwater resources. Vis, a small and remote karst island in the Adriatic Sea, exhibits peculiar geological and hydrogeological settings, resulting in the island’s autonomous water supply. The current pumping capacity (maximum of 42 l/s) meets most of the demand, but intensive summer tourism and climate change exert high stress on groundwater resources during the dry season. Consequently, in the last decade, occasional reductions for consumers occurred. Monitoring of in situ physicochemical parameters and groundwater sampling for chemical and isotopic analyses were conducted from 2020 to 2023 at deep borewells, shallow dug wells, and springs. Hydrochemical interpretation indicated that groundwater chemistry was affected primarily by carbonate and sulfate rock dissolution, mixing with seawater, reverse ion exchange, and dedolomitization. The majority of groundwater samples exhibit Ca–HCO3 hydrochemical facies, followed by Na–Cl and mixed facies. The low percentage of seawater in the mixture indicated that seawater intrusion is not too extensive even during prolonged dry periods, implying a favorable hydrostatic regime with relatively small but sufficient groundwater reserves of the island’s aquifers, although the investigated period was characterized by significantly lower precipitation with respect to the 30-year average.

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Cumulative effects of natural and anthropogenic processes on groundwater chemistry of a small karst island—case study of Vis (Croatia)

Patekar,

Briški,

Terzić

et al. 2024

Appl Water Sci

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Analysis of karst groundwater runoff conditions based on statistics and reverse hydrogeochemical modeling methods

Hui,

Shuhong,

Jingyu

et al. 2024

Preprint

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Karst groundwater is widely distributed in China, and karst water resources are the main source of water for human life, industry and agriculture. In order to scientifically understand and rationally exploit karst groundwater, it is necessary to analyze the runoff conditions of karst groundwater. This study comprehensively applied statistical methods, Shukalev classification, reverse hydrogeochemical modeling, and Kriging interpolation in ArcGIS to analyze the hydrochemical characteristics and runoff conditions of the three karst groundwater runoff zones in the Fengfeng mining area. The results show that: (1) The hydrochemical type in the study area is mainly HCO3·SO4-Ca·Mg type, and the eastern region changes greatly, while the western region changes little; (2) There are differences in the hydrogeochemical processes occurring in different runoff zones, and the groundwater flow field and geological structures play a significant controlling role in the hydrogeochemical reactions of the karst groundwater; (3) The runoff conditions derived from hydrogeochemical methods are consistent with existing geological data, indicating that this method is suitable for identifying groundwater runoff conditions. In this study, the hydrogeochemical reaction of karst groundwater in the flow process is quantitatively evaluated from the spatial point of view, and the runoff conditions of different runoff zones are analyzed, so as to provide new methods and new ideas for the determination of groundwater runoff conditions.

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Hydrochemical and Formation Mechanism Studies of Groundwater in Quaternary Aquifer in a Northern Plain of China: An Example of Beijing Plain

Camara,

Zhou,

Zhang

2024

Water

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Beijing Plain is a very active part of Beijing city regarding the socio-economic and human activities of the region. Over the past four decades, Beijing’s economic development and the continuous drought for nearly 10 years in the 2000s have negatively impacted the groundwater quantity and quality. Therefore, it is necessary to investigate the present situation of groundwater chemistry in this region to develop a comprehensive database and orientation for future research on groundwater quality evaluation. Mathematical statistics, Piper’s trilinear diagram, Gibbs plots, the ion ratio method and PHREEQC software 3.7.3 were used to analyze the groundwater hydrogeochemical characteristics and formation mechanisms of the quaternary aquifers of the Beijing Plain area. Hydrogeochemical results indicated that the groundwater is slightly alkaline, with pH values ranging from 6.76 to 8.65 and an average value of 7.92. The order of major cations in groundwater was Ca2+ > Na+ > Mg2+ > K+ with average values of 66.54 mg/L, 50.58 mg/L, 23.78 mg/L, and 1.81 mg/L, respectively, while the order of major anions was HCO3− > SO42− > Cl− with average values of 284.89 mg/L, 52.1 mg/L and 35.5 mg/L, respectively. The groundwater chemical types are Mg-Ca-Cl-HCO3, Na-Ca-HCO3, Mg-Ca-HCO3 and Mg-Na-HCO3. Research on the main influencing factors and PHREEQC hydrogeochemical inverse simulations results along the four pathways selected confirmed that rock weathering with sulfate, silicate and carbonate rock mineral dissolution and Na+, Mg2+ and Ca2+ ion reaction exchange influenced groundwater hydrogeochemical characteristics of the quaternary aquifers of the Beijing Plain area. Understanding the formation mechanisms of hydrogeochemistry in quaternary plains provides guidance for future studies and, through suggestions and case studies, facilitates decision-making by policy-makers on the sustainable management of groundwater resources.

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Hydrogeochemical Characteristics and Genetic Analysis of Karst Groundwater in the Fengfeng Mining Area

Cited by 3 publications

References 30 publications

Cumulative effects of natural and anthropogenic processes on groundwater chemistry of a small karst island—case study of Vis (Croatia)

Cumulative effects of natural and anthropogenic processes on groundwater chemistry of a small karst island—case study of Vis (Croatia)

Analysis of karst groundwater runoff conditions based on statistics and reverse hydrogeochemical modeling methods

Hydrochemical and Formation Mechanism Studies of Groundwater in Quaternary Aquifer in a Northern Plain of China: An Example of Beijing Plain

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