Hydrogeochemical characterization of groundwater flow systems in the discharge area of a river basin

Wang, Heng; Jiang, Xiao‐Wei; Wan, Li; Han, Guilin; Guo, Huaming

doi:10.1016/j.jhydrol.2015.04.063

Cited by 134 publications

(46 citation statements)

References 45 publications

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“…The ratio of [(Ca 2+ + Mg 2+ ) − (SO4 2− + HCO3 − )] and (Na + − Cl − ) is usually applied to evaluate the role of cation exchange taking place in the aquifer [46,50]. As shown in Figure 8a, the ratios of [(Ca 2+ + Mg 2+ ) − (SO4 2− + HCO3 − )]/(Na + − Cl − ) for most groundwater samples were close to 1:1, which indicated that cation exchange is a significant factor affecting the hydrochemical composition of groundwater [38].…”

Section: Cation Exchangementioning

confidence: 99%

Hydrogeochemistry of Shallow Groundwater in a Karst Aquifer System of Bijie City, Guizhou Province

Jiang

Deng

et al. 2017

Water

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Abstract:In this study, the major chemical compositions of 159 shallow groundwater samples incorporated saturation index (SI) and Principal Component Analysis (PCA) were employed to evaluate the mainly geochemical processes that control the hydrogeochemical evolution of groundwater in a typical karst area, Bijie city, Guizhou Province. The groundwater samples in this study area were dominated of HCO 3 -Ca, HCO 3 -Ca-Mg, and HCO 3 -SO 4 -Ca types. The PCA suggested that four principal components could explain 88.85% of the total variance of 10 parameters, indicating that the hydrogeochemical evolution of groundwater was mainly controlled by the dissolution/precipitation of carbonates, gypsum, and halite minerals, cation exchange, and anthropogenic activities. To be specific, the enrichment of Ca 2+ , Mg 2+ , HCO 3 − and SO 4 2− in groundwater were primarily affected by the dissolution of dolomite and gypsum minerals, and the role of calcite dissolution was relatively weaker because most groundwater samples were saturated with respect to calcite. Besides, cation exchange was another factor that may affect the concentration of Ca 2+ and Mg 2+ in groundwater, and the concentration of SO 4 2− can also be influenced by coal mining activity. In addition, the concentrations of Na + and Cl − in groundwater were likely influenced by the dissolution of halite, cation exchange, and human activities.

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Section: Cation Exchangementioning

confidence: 99%

Hydrogeochemistry of Shallow Groundwater in a Karst Aquifer System of Bijie City, Guizhou Province

Jiang

Deng

et al. 2017

Water

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“…The Ward's method for linkage with Euclidean distance was used to group groundwater samples in this study (Cloutier et al 2008;Wang et al 2015). The Ward's method for linkage with Euclidean distance was used to group groundwater samples in this study (Cloutier et al 2008;Wang et al 2015).…”

Section: Multivariate Statistical Analysis Hierarchical Cluster Analysismentioning

confidence: 99%

“…HCA can be applied to group groundwater samples according to their geochemical similarities. The Ward's method for linkage with Euclidean distance was used to group groundwater samples in this study (Cloutier et al 2008;Wang et al 2015). The results of the HCA performed on 105 groundwater samples are shown in the dendrogram (Figure 3).…”

Section: Hierarchical Cluster Analysismentioning

confidence: 99%

“…A positive CAI-1 and CAI-2 indicate that the ion exchange takes place between Na in groundwater and Ca or Mg within the aquifer minerals, while a negative CAI-1 and CAI-2 indicate the reverse ion exchange of Ca or Mg in groundwater with Na in aquifer medium (Wang et al 2015;Zhu et al 2017). Moreover, the larger the absolute value of CAI-1 and CAI-2, the higher degree of ion exchange (Wang et al 2015). As shown in Figure 9f, only five samples in C4 have positive CAI-1 and CAI-2, which indicates that these groundwater samples underwent ion exchange reaction.…”

Section: Natural Processesmentioning

confidence: 99%

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Hydrogeochemical Evolution Along Groundwater Flow Paths in the Manas River Basin, Northwest China

et al. 2018

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The impacts of long‐term pumping on groundwater chemistry remain unclear in the Manas River Basin, Northwest China. In this study, major ions within five surface water and 105 groundwater samples were analyzed to identify hydrogeochemical processes affecting groundwater composition and evolution along the regional‐scale groundwater flow paths using the multivariate techniques of hierarchical cluster analysis (HCA) and principal components analysis (PCA) and traditional graphical methods for analyzing groundwater geochemistry. HCA classified the groundwater samples into four clusters (C1 to C4). PCA reduced the dimensionality of geochemical data into three PCs, which explained 86% of the total variance. The results of HCA and PCA were used to identify three zones: “recharge,” “transition,” and “discharge.” In the recharge zone the groundwater type is Ca‐HCO3‐SO4 and is primarily impacted by the dissolution of calcite and silicate weathering. In the transition zone the groundwater type is Ca‐HCO3‐SO4‐Cl and is impacted by rock dissolution and reverse ion exchange. In the discharge zone the groundwater type is Na‐Cl and is impacted by evaporation and reverse ion exchange. In addition, anthropogenic activities impact the groundwater chemistry in the study area. The groundwater type generally changes from Ca‐HCO3‐SO4 in the recharge area to Na‐Cl in the discharge area along the regional‐scale groundwater flow paths. This study provides a process‐based knowledge for understanding the interaction of groundwater flow patterns and geochemical evolution within the Manas River Basin.

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“…Changes in water availability can have a substantial impact on ecosystems, which are a critical component of the hydrological cycle and an essential mediator between land surface and atmospheric interactions (Breuer et al, 2012). Soil is involved in many hydrological processes, including infiltration (Lichner et al, 2013), drainage to deeper layers (Wang et al, 2014), and discharge from groundwater (Wang et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Changes to soil water content and biomass yield under combined maize and maize-weed vegetation with different fertilization treatments in loam soil

Lehoczky

Kamuti

Mazsu

et al. 2016

Journal of Hydrology and Hydromechanics

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Especially during early developmental stages, competition with weeds can reduce crop growth and have a serious effect on productivity. Here, the effects of interactions between soil water content (SWC), nutrient availability, and competition from weeds on early stage crop growth were investigated, to better understand this problem. Field experiments were conducted in 2013 and 2014 using long-term study plots on loam soil in Hungary. Plots of maize (Zea mays L.) and a weed-maize combination were exposed to five fertilization treatments. SWC was observed along the 0-80 cm depth soil profile and harvested aboveground biomass (HAB) was measured.Significant differences were found between SWC in maize and maize-weed plots. In all treatments, measured SWC was most variable in soil depths of up to 50 cm, and at the 8-10 leaves (BBCH19) growth stage of the crop. The greatest depletion of SWC was detected within PK treatments across the entire soil profile and under both vegetation types, with depletion also considerable under NPK and NP treatments. Biomass growth was significantly influenced by weeds in treated plots between the BBCH 13 and 19 phenological stages, but water availability did not hamper growth rates in non-fertilized conditions. These findings suggest that, at early stages of crop growth, SWC model simulations need to include better characterisation of depth-and structure-dependent soil water uptake by vegetation.

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Hydrogeochemical characterization of groundwater flow systems in the discharge area of a river basin

Cited by 134 publications

References 45 publications

Hydrogeochemistry of Shallow Groundwater in a Karst Aquifer System of Bijie City, Guizhou Province

Hydrogeochemistry of Shallow Groundwater in a Karst Aquifer System of Bijie City, Guizhou Province

Hydrogeochemical Evolution Along Groundwater Flow Paths in the Manas River Basin, Northwest China

Changes to soil water content and biomass yield under combined maize and maize-weed vegetation with different fertilization treatments in loam soil

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