Hydrochemical evolution and groundwater flow processes in the Galilee and Eromanga basins, Great Artesian Basin, Australia: A multivariate statistical approach

Moya, Claudio; Raiber, Matthias; Taulis, Mauricio; Cox, Malcolm

doi:10.1016/j.scitotenv.2014.11.099

Cited by 91 publications

(22 citation statements)

References 33 publications

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“…Van Voast, 2003;Taulis and Milke, 2007;Alley et al, 2011;Dahm et al, 2014). Recent studies have used these characteristics to delineate flowpaths associated with CSG aquifers (Healy et al, 2011;Moya et al, 2015). Other studies have shown that, because of variations in mineralogy of different formations, strontium isotopic ratios could be useful in identifying areas where mixed contributions of CSG groundwater and shallower systems occur (Frost et al, 2002;Campbell et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Hydrochemical processes in a shallow coal seam gas aquifer and its overlying stream–alluvial system: implications for recharge and inter-aquifer connectivity

Duvert

Raiber

Owen

et al. 2015

Applied Geochemistry

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Section: Introductionmentioning

confidence: 99%

Hydrochemical processes in a shallow coal seam gas aquifer and its overlying stream–alluvial system: implications for recharge and inter-aquifer connectivity

Duvert

Raiber

Owen

et al. 2015

Applied Geochemistry

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“…The maximal similarity between two samples can be observed if they fall into the same cluster (Mc Kenna, ). In this study, HCA was employed to classify groundwater samples into the distinctive clusters using Ward's linkage method, which is widely used in hydrochemical studies (Moya, Raiber, Taulis, & Cox, ; Ward, ). This method uses an analysis of variance to separate different clusters based on how homogeneous the data are.…”

Section: Methodsmentioning

confidence: 99%

“…PCA is a well‐recognized data reduction method, which can explain the majority of variance by extracting the eigenvalues from the correlation between the chemical variables (Moya et al, ). Given that variables are generally expressed in different dimensions and units, each parameter needs to be standardized through z score transformation (Güler et al, ).…”

Section: Methodsmentioning

confidence: 99%

Using multivariate statistical techniques and geochemical modelling to identify factors controlling the evolution of groundwater chemistry in a typical transitional area between Taihang Mountains and North China Plain

Liu

Shou

Yeh

et al. 2020

Hydrological Processes

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Identifying the key factors controlling groundwater chemical evolution in mountain-plain transitional areas is crucial for the security of groundwater resources in both headwater basins and downstream plains. In this study, multivariate statistical techniques and geochemical modelling were used to analyse the groundwater chemical data from a typical headwater basin of the North China Plain. Groundwater samples were divided into three groups, which evolved from Group A with low mineralized Ca-HCO 3 water, through Group B with moderate mineralized Ca-SO 4 -HCO 3 water, to Group C with highly saline Ca-SO 4 and Ca-Cl water. Water-rock interaction and nitrate contamination were mainly responsible for the variation in groundwater chemistry. Groundwater chemical compositions in Group A were mainly influenced by dissolution of carbonates and cation exchange, and suffered less nitrate contamination, closely relating to their locations in woodland and grassland with less pronounced human interference. Chemical evolution of groundwater in Groups B and C was gradually predominated by the dissolution of evaporites, reverse ion exchange, and anthropogenic factors. Additionally, the results of the inverse geochemical model showed that dedolomitization caused by gypsum dissolution, played a key role in the geochemical evolution from Group A to Group B. Heavy nitrate enrichment in most groundwater samples of Groups B and C was closely associated with the land-use patterns of farmland and residential areas. Apart from the high loads of chemical fertilizers in irrigation return flow as the main source for nitrate contamination, the stagnant zones, flood irrigation pattern, mine drainage, and groundwater-exploitation reduction program were also important contributors for such high mineralization and heavy NO 3 − contents in Group C. The important findings of this work not only provide the conceptual framework for the headwater basin but also have important implications for sustainable management of groundwater resources in other headwater basins of the North China Plain. K E Y W O R D S geochemical modelling, groundwater evolution, headwater basin, hydrochemistry, multivariate statistical analysis, North China Plain

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“…Clear contrasts in the environmental tracer concentrations (or ratios expressing the relative abundance of isotopes) between aquifers indicate where there is little vertical flow, whereas similar environmental tracer concentrations may be an indication of mixing or enhanced inter-aquifer leakage. For example, major and trace element concentration data were used to demonstrate enhanced inter-aquifer leakage within the Galilee Basin, Australia (Moya et al 2015) and the Yarkon-Taninim basin, Israel (Zilberbrand et al 2014). Vertical leakage between the Continental and Djeffara aquifer system in Tunisia through a fault was identified and quantified using stable isotopes of water (Trabelsi et al 2009 Dogramaci and Herczeg 2002) and Adour-Garonne district, France (Brenot et al 2015).…”

Section: Introductionmentioning

confidence: 99%

“…1b). The GAB is one of the largest aquifer systems in the world, and has been the subject of numerous investigations, which focused largely on the eastern artesian and north-western sections of the basin (Habermehl 1980;Herczeg et al 1991;Love et al 2000Love et al , 2013Mahara et al 2009;IESC 2014;Moya et al 2015). Few studies focused on the unconfined south-western part of the GAB, but some have highlighted the potential connectivity between the GAB and the Arckaringa Basin (Smerdon et al 2012;Keppel et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Detecting inter-aquifer leakage in areas with limited data using hydraulics and multiple environmental tracers, including 4He, 36Cl/Cl, 14C and 87Sr/86Sr

et al. 2017

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The investigation of regionally extensive groundwater systems in remote areas is hindered by a shortage of data due to a sparse observation network, which limits our understanding of the hydrogeological processes in arid regions. The study used a multidisciplinary approach to determine hydraulic connectivity between the Great Artesian Basin (GAB) and the underlying Arckaringa Basin in the desert region of Central Australia. In order to manage the impacts of groundwater abstraction from the Arckaringa Basin, it is vital to understand its connectivity with the GAB (upper aquifer), as the latter supports local pastoral stations and groundwaterdependent springs with unique endemic flora and fauna. The study is based on the collation of available geological information, a detailed analysis of hydraulic data, and data on environmental tracers. Enhanced inter-aquifer leakage in the centre of the study area was identified, as well as recharge to the GAB from ephemeral rivers and waterholes. Throughout the rest of the study area, inter-aquifer leakage is likely controlled by diffuse inter-aquifer leakage, but the coarse spatial resolution means that the presence of additional enhanced inter-aquifer leakage sites cannot be excluded. This study makes the case that a multi-tracer approach along with groundwater hydraulics and geology provides a tool-set to investigate enhanced inter-aquifer leakage even in a groundwater basin with a paucity of data. A particular problem encountered in this study was the ambiguous interpretation of different age tracers, which is attributed to diffusive transport across flow paths caused by low recharge rates.

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Hydrochemical evolution and groundwater flow processes in the Galilee and Eromanga basins, Great Artesian Basin, Australia: A multivariate statistical approach

Cited by 91 publications

References 33 publications

Hydrochemical processes in a shallow coal seam gas aquifer and its overlying stream–alluvial system: implications for recharge and inter-aquifer connectivity

Hydrochemical processes in a shallow coal seam gas aquifer and its overlying stream–alluvial system: implications for recharge and inter-aquifer connectivity

Using multivariate statistical techniques and geochemical modelling to identify factors controlling the evolution of groundwater chemistry in a typical transitional area between Taihang Mountains and North China Plain

Detecting inter-aquifer leakage in areas with limited data using hydraulics and multiple environmental tracers, including 4He, 36Cl/Cl, 14C and 87Sr/86Sr

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