Assessing the hydrogeochemistry of groundwaters in ophiolite areas of Euboea Island, Greece, using multivariate statistical methods

Voutsis, Nikolaos; Kelepertzis, Efstratios; Tziritis, Evangelos; Kelepertsis, A.

doi:10.1016/j.gexplo.2015.08.007

Cited by 97 publications

(30 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2). The enrichment of alluvial aquifers in Cr(VI) has been also observed by Kazakis et al (2015), Megremi et al (2013) and Voutsis et al (2015). Finally, Kelepertzis et al (2013) have found that in Thiva basin which has a similar geological background, Cr(III) is mainly bounded within inherited chromite and to a lesser extent with Cr-magnetite and Cr silicates like enstatite, a conclusion which is in accordance to recent observations for this study.…”

Section: Occurrence Of Cr(vi) In Watersupporting

confidence: 92%

“…Hexavalent chromium contamination in groundwater has been reported at several areas of Greece. Elevated concentrations have been attributed to natural processes within ophiolite related aquifers Kaprara et al, 2015;Dermatas et al, 2015), anthropogenic activities in industrial zones such as the notorious case of the Oinofyta-Asopos groundwater contamination or a combination of both, such as the ultramafic rock rich area of central Euboea which is also characterized by intensive agriculture (Voutsis et al, 2015;Megremi et al, 2013). Previously published data from the area of Schinos, which is one of study areas of the present study, reported high concentrations of Cr(VI) in a few domestic water wells within the village and attributed contamination to uncontrolled waste disposal (Papadopoulos and Lappas, 2014).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Occurence of Hexavalent Chromium in the Ophiolite Related Aquifers of Loytraki and Schinos Areas

Pyrgaki¹,

Argyraki²,

Kelepertzis³

et al. 2017

geosociety

View full text Add to dashboard Cite

show abstract

Section: Occurrence Of Cr(vi) In Watersupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Occurence of Hexavalent Chromium in the Ophiolite Related Aquifers of Loytraki and Schinos Areas

Pyrgaki¹,

Argyraki²,

Kelepertzis³

et al. 2017

geosociety

View full text Add to dashboard Cite

show abstract

“…Multivariate statistical analysis has been extensively applied to analyze the complex hydrogeochemical processes taking place in the aquifer [15,17,20,26,27,35]. In this study, the PCA was chosen to analyze the hydrochemical dataset.…”

Section: Principal Component Analysis (Pca)mentioning

confidence: 99%

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

Jiang

Deng

et al. 2017

Water

View full text Add to dashboard Cite

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.

show abstract

“…In this study, the IBM® SPSS v.20 software was used to analyze the dimensional groundwater quality data of the samples including EC, pH, TDS, Ca 2+ , Mg 2+ , Na + , K + , HCO 3 − , CO 3 2− , F−, SO 4 2− , Cl−, hardness, alkalinity. PCA can determine the principal factors corresponding to both natural and anthropogenic processes that may have significant influences on the chemical composition of groundwater, while HCA can determine the number of groups that the hydrochemical data can be classified (Voutsis et al 2015). Two types of hierarchical cluster analysis (HCA) are usually used: Q mode HCA and R mode HCA.…”

Section: Sample Collection and Analysismentioning

confidence: 99%

Assessment of Groundwater Quality of Udayagiri area, Nellore District, Andhra Pradesh, South India Using Multivariate Statistical Techniques

Nagaraju¹,

Thejaswi²,

Sreedhar³

2016

Earth sci. res. j.

View full text Add to dashboard Cite

Hydrogeochemical studies were carried out in and around Udayagiri area of Andhra Pradesh in order to assess the chemistry of the groundwater and to identify the dominant hydrogeochemical processes and mechanisms responsible for the evolution of the chemical composition of the groundwater. Descriptive statistics, correlation matrices, principal component analysis (PCA), together with cluster analysis (CA) were used to gain an understanding of the hydrogeochemical processes in the study area. PCA has identified 4 main processes influencing the groundwater chemistry viz., mineral precipitation and dissolution, seawater intrusion, cation exchange, and carbonate balance. Further, three clusters C1, C2 and C3 were obtained. Samples from C1 contain high level of Cl − and may be due to the intensive evaporation and contamination from landfill leachate. Most of the samples from C2 are located closer to the sea and the high level of Na + +K + in these samples may be attributed to seawater intrusion. The geochemistry of water samples in C3 are more likely to originate from rock weathering. This has been supported by Gibbs diagram. The groundwater geochemistry in the study area is mostly of natural origin, but is influenced to some degree by human activity.Se realizaron estudios hidrogeoquímicos en y alrededor del área Udayagiri de Andhra Pradesh para evaluar la química del agua subterránea e identificar los procesos hidrogeoquímicos dominantes y los mecanismos responsables de la evolución en la composición química del agua subterránea. Se utilizaron estadísticas descriptivas, matrices de correlación, análisis de componentes principales, al igual que análisis de grupos, para obtener y entender los procesos hidrogeoquímicos en el área de estudio. Los análisis de componentes principales identificaron cuatro procesos determinantes que influenciaron la química del agua subterránea, estos son, la precipitación y disolución de minerales, l intrusión de agua marina, el intercambio de cationes y el equilibrio de carbonatos. De esta forma se obtuvieron tres grupos, C1, C2, y C3. Las muestras del grupo C1 contienen un alto nivel de Cl -, lo que podría deberse a la intensa evaporación y contaminación de los lixiviados de rellenos sanitarios. Muchas de las muestras del grupo C2 se ubican cerca del mar y el alto nivel de Na++K+ podría atriburise a la intrusión de agua marina. La geoquímica de las muestras de agua en el grupo C3 probablemente se desprende de la meteorización de rocas. El diagrama de Gibbs valida estos resultados. La geoquímica del agua subterránea en el área de estudio es principalmente de origen natural pero también está influenciado por la actividad humana en algún grado. EARTH SCIENCES RESEARCH JOURNALEarth Sci. Res. J. Vol. 20, No. 4 (December, 2016): E1-E7 ABSTRACT RESUMEN

show abstract

Assessing the hydrogeochemistry of groundwaters in ophiolite areas of Euboea Island, Greece, using multivariate statistical methods

Cited by 97 publications

References 49 publications

Occurence of Hexavalent Chromium in the Ophiolite Related Aquifers of Loytraki and Schinos Areas

Occurence of Hexavalent Chromium in the Ophiolite Related Aquifers of Loytraki and Schinos Areas

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

Assessment of Groundwater Quality of Udayagiri area, Nellore District, Andhra Pradesh, South India Using Multivariate Statistical Techniques

Contact Info

Product

Resources

About