Surface water-groundwater interaction using tritium and stable water isotopes: A case study of Middelburg, South Africa

Mahlangu, Sarah; Lorentz, Simon; Diamond, Roger E.; Dippenaar, Matthys Alois

doi:10.1016/j.jafrearsci.2020.103886

Cited by 20 publications

(11 citation statements)

References 27 publications

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“…Finally, the waters of the surface canals (C) show values attributable to sub-modern waters but with slightly higher values of 3 H (between 4 and 5 TU), probably relating to a possible mixing with modern waters due to their presence on the surface and direct contact with the atmosphere, as described in Mahlangu et al ( 2020 ) and Malov ( 2021 ).…”

Section: Resultsmentioning

confidence: 65%

“…The knowledge of the isotopic composition (δ 2 H, δ 18 O, and 3 H) in surface and groundwater in relation to the isotopic composition of the precipitations allows us to determine the average residence time of the water in the aquifers (Campbell et al, 2021 ; Krajcar Bronić & Barešić, 2021 ), the possible interconnections between different aquifers (Andries et al, 2021 ; Mahlangu et al, 2020 ), the origin of waters (Andries et al, 2021 ; Catalano et al, 2014 ), and the dynamics of processes in surface waters (Ramaroson et al, 2018 ; Schmidt et al, 2020 ). In addition, although the 3 H concentration in the atmosphere in recent years has reached values in line with the environmental threshold, thanks to the electrolytic enrichment methodologies it is possible to determine the low concentrations of 3 H using the liquid scintillation counting technique (Belachew et al, 2018 ; Lin et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

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Geochemical and isotopic tracers to define the aquifer’s vulnerability: the case study of the alluvial multi-aquifer system of the Friulian plain

Renzo

Rizzo

Telloli

et al. 2023

Environ Monit Assess

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The Friuli-Venezia Giulia Region (north of Italy) is characterized by the presence of high-quality freshwater resources which benefit local citizens, animals, environmental habitats, and also agriculture and production activities. Waters from wells, canal, and wastewater selected in the Fiume Veneto area, through a detailed lithological modeling, were sampled and analyzed to characterize them from a geochemical point of view. The chemical and isotopic characterization made it possible to establish provenance, and the average age of water used, making available the estimation of the relationships between recharge capacity and water use in the Fiume Vento area. The focus of this study is to define the average age of the resources based on the time required for the recharge contributions to compensate the losses induced by exploitation. The results made it possible to support the plans for a water balance using the provenance and average age of water sources for the protection of water reserves formed by the multi-aquifer system of the high and medium Friuli plain. The methodology applied has followed the legislation of the water directive considering the overexploitation due to unauthorized withdrawals of the sampling area.

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Section: Resultsmentioning

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Geochemical and isotopic tracers to define the aquifer’s vulnerability: the case study of the alluvial multi-aquifer system of the Friulian plain

Renzo

Rizzo

Telloli

et al. 2023

Environ Monit Assess

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“…water circulation system [29][30]. By studying the natural meteoric waters from many parts of the word, there is a linear relationship between stable isotopes of δD and δ 18 O defined by Craig in 1961, which is expressed as δD = 8δ 18 O + 10 and referred to as the Global Meteoric Water Line (GMWL) [31].…”

Section: Author Copy • Author Copy • Author Copy • Author Copy • Author Copy • Author Copy • Author Copy • Author Copy • Author Copymentioning

confidence: 99%

Hydrogeochemical Process and Quality Assessment of Surface Water Around Fuli Abandoned Quarries Area, Northern Anhui Province, China

Xu¹,

Gui²,

Chen³

et al. 2022

Pol. J. Environ. Stud.

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Surface water is an indispensable water resource of drinking and irrigation, which plays important role on human health and quantity of grain production. Hydrogeochemical process as well as quality assessment of 31 representative surface water samples from 3 typical lakes around Fuli abandoned quarries area were carried out. The cation is dominated by Ca 2+ and Mg 2+ , while the anion is dominated by HCO 3 and SO 4 2-. The two leading hydrochemical type are SO 4. HCO 3 -Ca.Mg (100%) in No. 1 lake, wheres HCO 3. SO 4-Ca.Mg (88.24%) and SO 4. HCO 3 -Ca.Mg (11.76%) of No.2 and No.3 lake. The chemical composition of No.1 lake are mainly controlled by carbonate dissolution and ion-exchange, the chemical composition of No.2 and No.3 lake is mainly influenced by both ion-exchange and dissolution of carbonate and silicate minerals, among which rock weathering is the most important factor. The recharging of the lakes is mainly derived from atmospheric precipitation with the existence of evaporation. The surface water in the study area, in general, is suitable for drinking and irrigation. The outcomes of this research provide a better understanding of hydrochemical mechanism of surface water around quarries, and it will help to improve management and sustainable utilization of water resources for local government.

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“…The Huixian wetland is in the karst core area of East Asia, representing one of three major karst distribution areas globally. The study area is −21 km southwest of the Guilin urban area with geographic coordinates of 25 • 04 58"-25 • 08 25" north latitude and 110 • 09 23"-110 • 14 36" east longitude [24][25][26][27]. The Huixian wetland has a mid-subtropical monsoon climate and falls in the central zone of subtropical peak forest landforms in China.…”

Section: Study Areamentioning

confidence: 99%

Seasonal Differences in the Hydrochemical Characteristics of Karst Wetlands and the Associated Mechanisms in Huixian, China

Dan

Luo

et al. 2022

Water

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The present study aimed to identify the seasonal changes in the hydrochemical characteristics of the Huixian karst wetland and the underlying mechanism. Conventional ions and isotopes of 130 groundwater samples collected during the wet and dry seasons were analyzed. The hydrochemical characteristics of groundwater in the Huixian karst wetland were clarified using mathematical statistics and hydrochemical methods, including Durov diagrams, ionic ratios, Gibbs diagrams, and H and O isotopes. The hydrochemical evolution and sources of major ions in the Huixian karst wetland were also investigated. The results showed that cations and anions in groundwater in the study area were dominated by Ca2+ and HCO3−, respectively, sourced mainly from calcite weathering. The ions of some groundwater samples were regulated by weathering of dolomite, dolomitic limestone, and pyrite, resulting in relatively high concentrations of Mg2+ and SO42−. K+, Na+, SO42−, NO3−, and Cl− in groundwater originated from precipitation, Na+ and Cl− originated from domestic sewage, K+ was related to the application of potassium fertilizer in agriculture, and NO3− mainly originated from chemical fertilizer. Groundwater ions were primarily controlled by rock weathering, followed by evaporative concentration. The sources of major ions were dependent on the dissolution and precipitation of carbonate rock, as well as the chemical weathering of silicate rock and evaporite. Samples from the various water sources were scattered on both sides of the local meteoric water line (δD = 3.13δ18O − 13.9), which indicated isotopic composition was affected by evaporation and precipitation.

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Surface water-groundwater interaction using tritium and stable water isotopes: A case study of Middelburg, South Africa

Cited by 20 publications

References 27 publications

Geochemical and isotopic tracers to define the aquifer’s vulnerability: the case study of the alluvial multi-aquifer system of the Friulian plain

Geochemical and isotopic tracers to define the aquifer’s vulnerability: the case study of the alluvial multi-aquifer system of the Friulian plain

Hydrogeochemical Process and Quality Assessment of Surface Water Around Fuli Abandoned Quarries Area, Northern Anhui Province, China

Seasonal Differences in the Hydrochemical Characteristics of Karst Wetlands and the Associated Mechanisms in Huixian, China

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