Hydrochemical Characteristics and Evolution of Groundwater in the Alluvial Plain (Anqing Section) of the Lower Yangtze River Basin: Multivariate Statistical and Inversion Model Analyses

Che, Qiaohui; Su, Xiaosi; Wang, Shixiong; Zheng, Shida; Li, Yunfeng

doi:10.3390/w13172403

Cited by 11 publications

(5 citation statements)

References 43 publications

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“… PC3 - has a total variance of 16.0% with higher positive loading for TA and HCO 3 − and moderate loading for Mg 2+ . Contribution of these variables could be attributed from the substantial amounts of dissolved carbon dioxide and from the water–rock interactions occurring more often between the groundwater and aquifer which results in strong carbonate dissolution [ 108 ]. PC4 and PC5 - accounted for 12.3% and 8.57% of total variance, respectively with moderate positive loadings of Temp.…”

Section: Resultsmentioning

confidence: 99%

Assessment of hydrogeochemistry in groundwater using water quality index model and indices approaches

Uddin,

Diganta,

Sajib

et al. 2023

Heliyon

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Section: Resultsmentioning

confidence: 99%

Assessment of hydrogeochemistry in groundwater using water quality index model and indices approaches

Uddin,

Diganta,

Sajib

et al. 2023

Heliyon

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“…Consistent with the significant difference between groups of Na + /Cl – , the CAI value of the SMF group was significantly different from other groups, which further indicated that the relative abundance of Na + and Cl – in water would significantly affect the intensity of the cation exchange reaction during the water–rock interaction. Next, the sodium adsorption ratio (SAR) can be used to identify the strength of cation exchange in the water–rock interaction Figure d shows that the SAR value of the SMF group was lower than that of the other groups, indicating that the cation exchange in the SMF group was relatively weak in the process of the water–rock interaction.…”

Section: Discussionmentioning

confidence: 99%

“…Next, the sodium adsorption ratio (SAR) can be used to identify the strength of cation exchange in the water− rock interaction. 49 Figure 7d shows that the SAR value of the SMF group was lower than that of the other groups, indicating that the cation exchange in the SMF group was relatively weak in the process of the water−rock interaction. From the time stage, the order of SAR values in the four groups was early-stage > middle-stage > late-stage, showing that the cation exchange effect decreased gradually with the extension of the reaction time.…”

Section: Analysis Of the Main Ion Sources In Each Stage Ofmentioning

confidence: 99%

Research on Temporal Patterns of Water–Rock Interaction in the Coal Mine Underground Reservoir Based on the Dynamic Simulation Test

et al. 2023

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The temporal pattern of water−rock interaction is significant in predicting the ion concentration of the effluent in coal mine underground reservoirs. This study used the roof-caved rock samples and main incoming water (mine water and fissure water) of the Daliuta coal underground reservoir as the research object and designed four groups of dynamic simulation experiments of the water−rock interaction. Based on the main ion concentrations in the water sample at different reaction times, Q-type hierarchical cluster analysis (HCA) was used to classify the stages of water− rock interaction. The types and intensities of water−rock interaction in each stage were identified by combining the ion ratio and principal component analysis (PCA). Q-type HCA shows that the dynamic simulation experimental water samples can be divided into three categories according to the reaction time, representing the early, middle, and late stages of the water−rock interaction process. The influence of water quality on the division of the water−rock interaction stage is greater than that of rock characteristics. The ion ratio and PCA show that the dissolution of pyrite minerals, cation exchange reaction, and mineral adsorption mainly occur in the early stage of water−rock interaction, in which the cation exchange reaction plays a leading role in the change of ions in water. In the middle stage, the cation exchange reaction and the dissolution of carbonate minerals, such as calcite and dolomite, mainly occur, in which mineral dissolution is the main. In the late stage, the water−rock interaction is relatively weak, and the change of ion concentration in water is not obvious. This study proves the temporal patterns of water−rock interaction between caved rock and mine water (or fissure water) and differences in the types and intensities of water−rock interaction in each stage. The results can provide a theoretical basis for the optimization of the operation cycle of coal mine underground reservoirs and the prediction of effluent ion concentration.

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“…To understand the chemical processes controlling the mineralization of waters of the various facies in the Batha hydrogeological system chemical data were acquired. On the other hand, to distinguish the contribution of rainfall, water/rock interaction and/or evaporation the Gibbs's plot was commonly used (Chacha et al 2018;Xanke et al 2020;Che et al 2021;Keesari et al 2021) in the semi-arid context. The contributions of others processes as base-exchange and ionic equilibrium were investigated using binary diagrams.…”

Section: Analytical Proceduresmentioning

confidence: 99%

Groundwater assessment in endorheic basins at the transition arid-semi-arid climates in Africa- A case study of the Batha aquifer system, NE Chad

ARRAKHAIS,

Hamit,

Fontaine

et al. 2024

Preprint

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The present study focuses on the hydrogeological system of the Batha basin (Chad). This area is symptomatic of the functioning of an endoreic basin in an arid to semi-arid climate, of its water storage capacity related with the climatic fluctuations, and of the problems associated with assessing resources in this Sahelian zone. This basin forms the eastern part of the Lake Chad basin, which extends over 2.38 Mkm2. It is a vast sedimentary basin, filled by detrital and fluvial-lacustrine deposits of Eocene (Continental Terminal) to Quaternary age, and bordered by Precambrian crystalline formations. The study aims to assess the aquifer potential of the groundwater system and its dynamics using a combined geology-hydrogeology-hydrochemistry approach. The lithology defined an heterogeneous and multi-layered system. The piezometric map reveals the dynamics of the general groundwater flow direction SE-NW, suggesting the interconnection of the different parts of the aquifer system. Based on the concentrations of major ions in solution, the hydrochemical results have identified four main types of facies: calcium bicarbonate (dominant), sodium bicarbonate, sulphate-sodium and mixed. The mineralization of these facies appears to be essentially controlled by water-rock interaction and to a lesser extent by base exchange and evaporation process. Calculations of saturation indices indicate that these waters are close to equilibrium with the calcite-Mg phases, gaylussite and gypsum. Nevertheless, given the low and medium ionic contents, it appears that the groundwater in the Batha basin is moderately evolved. On the other hand, stable isotope analyses (δ2H and δ18O) of groundwaters show the existence of three compositional groups corresponding to: (A) ancient water disconnected from current meteoric influences, (B) mixtures of current meteoric water and older water affected by evaporation during infiltration, (C) mixtures of current and ancient meteoric water more impacted by the evaporation process. In addition, tritium (3H) analysis of these waters shows the existence of three composition groups corresponding to current rainwater, modern water and post-modern water. Taken together, these results show that the hydrogeochemical differentiations obtained from both ionic and isotopic analyses cannot be strictly associated with the different aquifers (Quaternary, Pliocene, CT and basement). This confirms the interconnection of the Batha system and suggests that the heterogeneity observed is mostly controlled by lithological and climatic variations.

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Hydrochemical Characteristics and Evolution of Groundwater in the Alluvial Plain (Anqing Section) of the Lower Yangtze River Basin: Multivariate Statistical and Inversion Model Analyses

Cited by 11 publications

References 43 publications

Assessment of hydrogeochemistry in groundwater using water quality index model and indices approaches

Assessment of hydrogeochemistry in groundwater using water quality index model and indices approaches

Research on Temporal Patterns of Water–Rock Interaction in the Coal Mine Underground Reservoir Based on the Dynamic Simulation Test

Groundwater assessment in endorheic basins at the transition arid-semi-arid climates in Africa- A case study of the Batha aquifer system, NE Chad

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