Key hydrological process of a multiple aquifer flow system in the mining area of Huaibei plain, Eastern China

Ju, Qiding; Hu, Youbiao; Liu, Qimeng; Liu, Yu; Hu, Taifeng

doi:10.1016/j.apgeochem.2022.105270

Cited by 9 publications

(5 citation statements)

References 46 publications

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“…7d) are located on the y = x line, indicating the presence of gypsum dissolution in all phases of the aquifer. The molar ratio of HCO 3 and Ca 2+ reflects the dissolution, cation exchange or desulfation of carbonate minerals [11]. A p(HCO 3 -) to p(Ca 2+ ) ratio of 2 indicates that HCO 3 and Ca 2+ originate from calcite dissolution only, and a ratio of 4 indicates only dolomite dissolution.…”

Section: Hydrochemical Faciesmentioning

confidence: 99%

“…Shallow groundwater resources are facing depletion [5][6][7][8][9]. In addition, surface wells are drying up, which affects residents' domestic water supply [10,11]. However, through a long series of processes, groundwater undergoes a variety of hydrogeochemical processes that lead to water quality deterioration and water resource depletion [12][13][14].The evolution of groundwater composition can only be assessed through scientific studies, which are key for water resource management and control.…”

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confidence: 99%

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Spatial and Temporal Evolutions of Shallow Groundwater with Anthropogenic Activities: A Case Study of Sunan Mine Region, China

Ju,

Hu,

Liu

et al. 2024

Pol. J. Environ. Stud.

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The availability of shallow groundwater resources has attracted attention in coal mining areas, due to its applications as a reliable municipal water source, in agriculture and mineral extraction, as well as in underground engineering construction [1][2][3][4]. In the coal mining area, mining has caused water from loose Cenozoic strata and Permian sandstone to infiltrate rapidly into the mine, causing a regional groundwater decrease. Shallow groundwater resources are facing depletion [5][6][7][8][9]. In addition, surface wells are drying up, which affects residents' domestic water supply [10,11]. However, through a long series of processes, groundwater undergoes a variety of hydrogeochemical processes that lead to water quality deterioration and water resource depletion [12][13][14].The evolution of groundwater composition can only be assessed through scientific studies, which are key for water resource management and control. In this regard, water chemistry data from different periods serve as a tool for research. Traditional water chemistry analysis methods such as Piper, Gibbs, and ion scatter diagrams have been widely used to study groundwater types and

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Section: Hydrochemical Faciesmentioning

confidence: 99%

mentioning

confidence: 99%

Spatial and Temporal Evolutions of Shallow Groundwater with Anthropogenic Activities: A Case Study of Sunan Mine Region, China

Ju,

Hu,

Liu

et al. 2024

Pol. J. Environ. Stud.

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“…To simplify the problem, four representative aquifers are selected for study, namely the Quaternary loose aquifer (QLA), Permian fracture sandstone aquifer (PFA), Carboniferous fracture limestone aquifer (CFA), and Ordovician fracture limestone aquifer (OFA). These aquifers are common water inrush aquifers in mining, and they are connected by faults or mining fractures [35,38]. The western part of the profile is the water barrier boundary, and the eastern part is the recharge area (Figure 2).…”

Section: Study Areamentioning

confidence: 99%

Hydrogeochemical Processes and Connection of Multi-Layer Groundwater System in Sunan Mining Area, Eastern China

Chen

et al. 2022

IJERPH

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Groundwater is an important freshwater resource in the world and serves as the main source of water for mining areas in Northern China. Coal mining may cause changes in water quality. As such, to identify ways to prevent water contamination, this study investigates the hydrogeochemical processes and transport paths of a complex aquifer system in the Sunan mining area in Northern China. Using the APFS-MLR model, a geographic information system (GIS) spatial analysis, and a hydrochemical correlation analysis method, this study identifies the potential mineral phases in groundwater, the spatial distribution of mineral reactions, and the contribution rate of these reactions to hydrochemical variables. Inverse modeling is used to verify hydrogeochemical process. The study reveals the relationship between multiple aquifers and four hydrological transport paths. Here, Path 1 and Path 2 show that the Quaternary aquifer, Carboniferous aquifer, and Ordovician aquifer are recharging the Permian aquifer through mineral dissolution and precipitation, cation exchange, and sulfate reduction. On the other hand, Path 3 and Path 4 show that tthe connections of Carboniferous and Ordovician limestone aquifers are dominated by the dissolution and precipitation of minerals and cation exchange, and that they are mainly recharged by the Quaternary aquifer. In the future, the water level of the Permian aquifer may rise somewhat after mining ends, and the mixing of water from the Permian aquifer, Quaternary aquifer, Carboniferous aquifer, and Ordovician aquifer could cause cross-pollution. In addition, sewage produced by human activities may recharge the deep water through the shallow water, polluting the deep karst water. As such, measures should be taken to reduce the hydraulic connection between Permian mine water and karst aquifers. The results of this study may benefit water quality predictions and treatment approaches in other complex multi-layer aquifer areas in the world.

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“…In addition, previous studies have mostly focused on qualitative analysis of hydrochemical reactions, and there is a shortage of quantitative simulation research on the hydrochemical evolution of Taiyuan Formation limestone groundwater. In fact, unlike the conditions of shallow unconsolidated groundwater circulation, deep groundwater circulation in the Taiyuan Formation is often significantly affected by regional faults and major fractures [33,34], which is often ignored by previous studies [35,36]. Therefore, accurately understanding the distribution of waterblocking faults in Sunan mining area and defining hydrological units, as well as conducting reverse simulation modeling, will contribute to the elaborate characterization of hydrogeochemical evolution.…”

Section: Introductionmentioning

confidence: 99%

Hydrochemical Characteristics and Reverse Hydrogeochemical Modeling of Taiyuan Formation Limestone Groundwater of Sunan Mining Area in Huaibei Coalfield

Gong,

Peng,

et al. 2024

Pol. J. Environ. Stud.

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Taiyuan Formation limestone groundwater is the main aquifer threatening the safety of exploration under deep mining in the Huaibei coalfield. Therefore, acknowledging the hydrochemical characteristics and constructing reverse hydrogeochemical modeling are crucial for predicting and preventing mine water hazards. In this study, the mathematical statistical analysis, Piper threeline diagram, Gibbs diagram, ion proportional relationship, Chlorine-Alkali index, and the reverse hydrogeochemical modeling were employed for determining the hydrochemical characteristics and the formation mechanism. The results revealed that the hydrochemical types of groundwater samples were SO 4 .Cl-Ca.Mg and HCO 3 .Cl-Na, respectively. The water-rock interactions were primarily influenced by the leaching and the cation exchange, with these processes being more intense in the eastern region. Through reverse hydrogeochemical modeling, the water-rock interactions in the process of groundwater runoff were quantitatively verified, viz. the calcite and the dolomite were saturated and precipitating, while the gypsum and the halite were unsaturated and still dissolving. Furthermore, the simulations of mass transfer in groundwater runoff indicated that the dissolution and the leaching of gypsum, dolomite and halite, positive ion exchange, the precipitation of calcite, and the dissolution of CO 2 gas predominantly occurred along four simulated flow paths. These results offered a scientific foundation for the prevention and controlling of mine water hazards in deep mining contexts.

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Key hydrological process of a multiple aquifer flow system in the mining area of Huaibei plain, Eastern China

Cited by 9 publications

References 46 publications

Spatial and Temporal Evolutions of Shallow Groundwater with Anthropogenic Activities: A Case Study of Sunan Mine Region, China

Spatial and Temporal Evolutions of Shallow Groundwater with Anthropogenic Activities: A Case Study of Sunan Mine Region, China

Hydrogeochemical Processes and Connection of Multi-Layer Groundwater System in Sunan Mining Area, Eastern China

Hydrochemical Characteristics and Reverse Hydrogeochemical Modeling of Taiyuan Formation Limestone Groundwater of Sunan Mining Area in Huaibei Coalfield

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