Isotopic and Hydrogeochemical Signatures in Evaluating Groundwater Quality in the Coastal Area of the Mekong Delta, Vietnam

Tran, Dang An; Tsujimura, Maki; Vo, Phu Le; Ha, Doan Thu; Hai, Nguyen Van

doi:10.1007/978-3-319-68240-2_18

Cited by 9 publications

(8 citation statements)

References 62 publications

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“…This study was conducted in Soc Trang Province, one of the coastal regions of the Mekong Delta, Vietnam. Groundwater has played a critical freshwater resource for over a century because it has high yields, good quality, and low extraction costs [17]. However, there was a decline in groundwater levels (0.01-0.55 m a -1 ) in all aquifer systems from 1996 to 2017, which means that the ratio of current groundwater abstraction is higher than that of recharge [18].…”

Section: Introductionmentioning

confidence: 99%

Groundwater Quality Assessment Using Groundwater Quality Index and Multivariate Statistical Methods and Human Health Risk Assessment in a Coastal Region of the Vietnamese Mekong Delta

2022

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This study aimed to evaluate the suitability of groundwater for drinking purposes and assess the associated human health risks for different age groups in a coastal province of Mekong Delta, Vietnam. Twenty groundwater samples were collected in Soc Trang Province, and various water quality parameters were analyzed. The data were employed to calculate entropy-weighted groundwater quality index (EWQI), principal component analysis (PCA), cluster analysis (CA), and non-carcinogenic and carcinogenic risks for adult and children health. The results revealed that groundwater in some locations, especially in GW19, was polluted by hardness, total dissolved solids, NH4+, Cl-, Fe, total coliform, and E. coli. In addition, 5 principal components from the PCA results could explain 84.5% of the total variation of groundwater quality, which also suggested that the potential groundwater pollution sources were geochemical processes, agricultural activities, domestic and industrial wastewater, seawater intrusion, and excessive nitrogen fertilizer application. The CA results showed that monitoring locations can be divided into 4 clusters based on their similarities in groundwater quality, and the most polluted group was found at cluster IV (GW19). The computed EWQI values ranged from 20.05 to 738.52, with approximately 45% of total samples classifying good to excellent water quality. The sampling points with undrinkable quality are mainly located in the northeast and center of the province. The ratio of children and adults under the threat of adverse health effects due to drinking groundwater contained non-carcinogenic substances (NH4+, NO2-, NO3-, Cd, Cu, F-, Mn, and As) ranged from 5 to 40%, and children had higher risks compared to adults. Additionally, the consumption of As-contaminated groundwater also poses carcinogenic risks for children, female and male adults ranging from 4.80×10-6 to 1.33×10-4. The findings of this study can provide helpful information for policymakers in the development of long-term water management strategies to protect community health.

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Section: Introductionmentioning

confidence: 99%

Groundwater Quality Assessment Using Groundwater Quality Index and Multivariate Statistical Methods and Human Health Risk Assessment in a Coastal Region of the Vietnamese Mekong Delta

2022

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“…Normally, fresh groundwater is dominated by Ca 2+ ; but under specific conditions, an increase in Cl − concentration was considered as an indicator of a salinity trend and as a possible seawater intrusion in coastal aquifer [13,23].…”

Section: Groundwater Geochemistry Characterizationmentioning

confidence: 99%

Multivariate Pollution in the Coastal Aquifer of Lebna area, Northeastern Tunisia

Ziadi¹,

Tlatli²,

Tarhouni³

2020

Groundwater Hydrology

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Anthropogenic contamination and excessive water consumption endanger an overexploitation of groundwater, which causes groundwater mineralization in coastal aquifer of Lebna area. Consequently, the salinity of groundwater reserves increases and creates big economic, agricultural, and social problems. Moreover, agricultural activities are the main source of nitrate, sulfate, and potassium ions and contribute to groundwater salinization and contamination with increasing chloride and nitrate concentrations. The objectives of this research are to determine the main source of groundwater salinization in coastal aquifer of Lebna area to not confuse between seawater intrusion and fertilizer effects and to determine the salinity effects on the ecosystem. To reach this goal, several geological tools and hydrogeological data are used in combination with geochemical and geophysical methods.

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“…Despite the high demand on groundwater resources (Wagner et al, ) for household and industrial consumption (Danh & Khai, ), surface–groundwater interaction and groundwater recharge have not been sufficiently quantified (Thu, ). Instead, there has been considerable interest in the arsenic contamination of groundwater (Buschmann et al, ; Erban, Gorelick, Zebker, & Fendorf, ; Kocar et al, ; Merola, Hien, Quyen, & Vengosh, ; Shinkai, Truc, Sumi, Canh, & Kumagai, ; Stanger, Truong, Ngoc, Luyen, & Thanh, ) and general groundwater quality (An, Tsujimura, Phu, Ha, & Hai, ; Hoang, Bang, Kim, Nguyen, & Dang, ; Le Luu, ; Wilbers, Sebesvari, & Renaud, ) in the VMD. Also, tracer‐based groundwater studies have primarily focused on qualitative aspects such as tracing the groundwater recharge sources (e.g., An et al, ; An, Tsujimura, Le Phu, Kawachi, & Ha, ; Ho et al, ; Thu, ).…”

Section: Introductionmentioning

confidence: 99%

“…Instead, there has been considerable interest in the arsenic contamination of groundwater (Buschmann et al, ; Erban, Gorelick, Zebker, & Fendorf, ; Kocar et al, ; Merola, Hien, Quyen, & Vengosh, ; Shinkai, Truc, Sumi, Canh, & Kumagai, ; Stanger, Truong, Ngoc, Luyen, & Thanh, ) and general groundwater quality (An, Tsujimura, Phu, Ha, & Hai, ; Hoang, Bang, Kim, Nguyen, & Dang, ; Le Luu, ; Wilbers, Sebesvari, & Renaud, ) in the VMD. Also, tracer‐based groundwater studies have primarily focused on qualitative aspects such as tracing the groundwater recharge sources (e.g., An et al, ; An, Tsujimura, Le Phu, Kawachi, & Ha, ; Ho et al, ; Thu, ). In other parts of the Mekong Delta, groundwater studies estimated the sources of recharge affected by evaporation, for example, from the wetland and ponds to the shallow groundwater in Cambodia (e.g., Lawson et al, ; Lawson, Polya, Boyce, Bryant, & Ballentine, ; Richards et al, ).…”

Section: Introductionmentioning

confidence: 99%

Identification of groundwater mean transit times of precipitation and riverbank infiltration by two‐component lumped parameter models

Duy

Dũng

Heidbüchel

et al. 2019

Hydrological Processes

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Groundwater transit time is an essential hydrologic metric for groundwater resources management. However, especially in tropical environments, studies on the transit time distribution (TTD) of groundwater infiltration and its corresponding mean transit time (mTT) have been extremely limited due to data sparsity. In this study, we primarily use stable isotopes to examine the TTDs and their mTTs of both vertical and horizontal infiltration at a riverbank infiltration area in the Vietnamese Mekong Delta (VMD), representative of the tropical climate in Asian monsoon regions.Precipitation, river water, groundwater, and local ponding surface water were sampled for 3 to 9 years and analysed for stable isotopes (δ 18 O and δ 2 H), providing a unique data set of stable isotope records for a tropical region. We quantified the contribution that the two sources contributed to the local shallow groundwater by a novel concept of two-component lumped parameter models (LPMs) that are solved using δ 18 O records.The study illustrates that two-component LPMs, in conjunction with hydrological and isotopic measurements, are able to identify subsurface flow conditions and water mixing at riverbank infiltration systems. However, the predictive skill and the reliabil-

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Isotopic and Hydrogeochemical Signatures in Evaluating Groundwater Quality in the Coastal Area of the Mekong Delta, Vietnam

Cited by 9 publications

References 62 publications

Groundwater Quality Assessment Using Groundwater Quality Index and Multivariate Statistical Methods and Human Health Risk Assessment in a Coastal Region of the Vietnamese Mekong Delta

Groundwater Quality Assessment Using Groundwater Quality Index and Multivariate Statistical Methods and Human Health Risk Assessment in a Coastal Region of the Vietnamese Mekong Delta

Multivariate Pollution in the Coastal Aquifer of Lebna area, Northeastern Tunisia

Identification of groundwater mean transit times of precipitation and riverbank infiltration by two‐component lumped parameter models

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