Water resources management strategies and its implications on hydrodynamic and hydrochemical changes of costal groundwater: Case of Grombalia shallow aquifer, NE Tunisia

Lachaal, Fethi; Chekirbane, Anis; Chargui, Sameh; Sellami, Haykel; Tsujimura, Maki; Hezzi, Hmida; Faycel, Jelassi; Mlayah, Ammar

doi:10.1016/j.jafrearsci.2016.09.024

Cited by 20 publications

(22 citation statements)

References 49 publications

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“…The recharge of the aquifer is mainly occurred in the east part of the basin, precisely in the pediment of Abderrahman mountain, and converges to the north of Grombalia towards the Gulf of Tunis (discharge area) [7,11,14,16], with SE-NW groundwater flow direction. The piezometric levels of shallow and deep aquifers converge from the south (the foothills of Abderrahman Mt.)…”

Section: Site Descriptionmentioning

confidence: 99%

“…The 14 C activities of groundwater samples, collected during the sampling campaign in 2017, range from 46.7 (Sample No. 124) to 103 ± 1 pmc (Sample No.…”

Section: Carbon-14 Isotopementioning

confidence: 99%

“…This anthropogenic recharge can therefore have a severe influence on the groundwater quality that needs to be assessed. Even though other studies [7,10,[13][14][15][16] have focused on this aquifer, the complexity to determine all the multiple processes contributing to aquifer salinization and the different recharge processes still need to be fully understood.…”

Section: Introductionmentioning

confidence: 99%

“…Overall, the aim of the present investigation is to trace groundwater origin and its residence time. To achieve these goals, a combined use of geochemical and isotopic (δ 18 O, δ 2 H, 3 H, 14 C and δ 13 C) tracers was adopted to study the main processes controlling groundwater mineralization and its relation with the aquifer recharge.…”

Section: Introductionmentioning

confidence: 99%

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Coastal Aquifer Salinization in Semi-Arid Regions: The Case of Grombalia (Tunisia)

Kammoun

Trabelsi

Ré

et al. 2021

Water

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Groundwater resources are facing increasing pressure especially in semi-arid regions where they often represent the main freshwater resource to sustain human needs. Several aquifers in the Mediterranean basin suffer from salinization and quality degradation. This study provides an assessment of Grombalia coastal aquifer (Tunisia) based on multidisciplinary approach that combines chemical and isotopic (δ2H, δ18O, 3H, 14C and δ13C) methods to characterize the relation between groundwater quality variation and aquifer recharge. The results indicate that total dissolved solids exceed 1000 mg/L in the most of samples excepting the recharge area. In addition to water–rock interaction, evaporation and nitrate pollution contributing to groundwater mineralization, the reverse cation exchange process constitute an important mechanism controlling groundwater mineralization with enhancing risk of saltwater intrusion. Environmental isotope tracers reveal that groundwater is evolving within an open system to close system. A significant component of recent water that is recharging Grombalia aquifer system is confirmed by applying correction models based on the δ13C values and 14C activities and tritium contents. However, this recharge, which is mainly associated to the return flow of irrigation water, contributes to the groundwater salinization, especially for the shallow aquifer.

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Section: Site Descriptionmentioning

confidence: 99%

“…The 14 C activities of groundwater samples, collected during the sampling campaign in 2017, range from 46.7 (Sample No. 124) to 103 ± 1 pmc (Sample No.…”

Section: Carbon-14 Isotopementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Coastal Aquifer Salinization in Semi-Arid Regions: The Case of Grombalia (Tunisia)

Kammoun

Trabelsi

Ré

et al. 2021

Water

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“…For the groundwater flow model, the boundary conditions describe the flow exchange between the model and the external system 30 . The objectivity and accuracy of the boundary condition setting determine the possibility of the simulated solution and the rationality of the model.…”

Section: Flow and Contaminant-transport Modellingmentioning

confidence: 99%

Research on drinking-groundwater source safety management based on numerical simulation

Song

Ren

Mohamed

et al. 2020

Sci Rep

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A drinking-groundwater source protection technology system based on a three-dimensional finite-difference groundwater model was constructed and applied to the safe management of drinking groundwater in the first terrace of Fujiang River. In the study area, the main type of groundwater is the quaternary systemic alluvial deposit loose rock pore water and the aquifer thickness varies between 20 and 35 m. Groundwater is the main source of water and is used for various purposes through two exploitation wells. The water volumes of 1# exploitation well (1#) and 2# exploitation well (2#) are 10,000 m3/day and 5000 m3/day, respectively. An analysis of 22 indicators from 11 groundwater samples showed that a higher concentration of chemical-oxygen-demand (CODMn) and ammonia–nitrogen (NH3–N), and they had a high correlation with most of the other water-quality factors. Therefore, CODMn and NH3–N were selected as indicator factors for model calibration and prediction. Twenty-two hydraulic head observation wells were used for flow-model calibration. The flow model indicated that a drop funnel formed with a maximum depth of 12 m, and the particle-capture zone in the original downstream direction of the south side extended to 1100 m because of groundwater exploitation. The solute-transport model showed that industrial pollution sources were the main factors that led to a deterioration of water quality. To analyze the necessity and effectiveness of remediation measures for the safety of drinking-water sources, two scenarios were considered to predict the concentration of NH3-N and CODMn in groundwater exploitation wells over 20 years. Scenario I, which considered that current conditions were maintained, predicted that the NH3-N would exceed the drinking-water quality standard of 0.5 mg/L after 16 years. Scenario II, in which industrial sewage treatment plants were installed outside the particle-trapped zone of the exploitation wells and strict anti-seepage measures were implemented, predicted that the peak concentrations of NH3-N and CODMn in the exploitation wells would be 0.26 mg/L and 1.33 mg/L, respectively, after 3 years of model operation. This study provides a theoretical basis for drinking-groundwater source protection that can be applied to safety management practices.

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HRMS-Based Innovative Monitoring of Grombalia Groundwater (Tunisia)

Akrout,

Baccouche,

Mellah

et al. 2024

Recent Research on Environmental Earth Sciences, Geomorphology, Soil Science and Paleoenvironments

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Water resources management strategies and its implications on hydrodynamic and hydrochemical changes of costal groundwater: Case of Grombalia shallow aquifer, NE Tunisia

Cited by 20 publications

References 49 publications

Coastal Aquifer Salinization in Semi-Arid Regions: The Case of Grombalia (Tunisia)

Coastal Aquifer Salinization in Semi-Arid Regions: The Case of Grombalia (Tunisia)

Research on drinking-groundwater source safety management based on numerical simulation

HRMS-Based Innovative Monitoring of Grombalia Groundwater (Tunisia)

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