Impacts of Global Changes on Groundwater Resources in North-East Tunisia: The Case of the Grombalia Phreatic Aquifer

Lachaal, Fethi; Chargui, Sameh; Messaoud, Rania Ben; Chekirbane, Anis; Tsujimura, Maki; Mlayah, Ammar; Massuel, Sylvain; Leduc, Christian

doi:10.1007/978-3-319-69356-9_21

Cited by 7 publications

(4 citation statements)

References 13 publications

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“…However, in the two past decades, the overexploitation of the shallow aquifer has caused water quality degradation. The main mechanism contributing to aquifer salinization, as pointed out in previous works [10,11,13,[15][16][17]24,25], is the dissolution of evaporate minerals such as halite (NaCl), gypsum (CaSO 4 2H 2 O) and anhydrite (CaSO 4 ). This process was highlighted by the strong correlation between Na + versus Cl − and between Ca 2+ versus SO 4 2− .…”

Section: Salinity Evolution: Application Of Geostatistical Mapping Toolsmentioning

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%

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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: Salinity Evolution: Application Of Geostatistical Mapping Toolsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Kammoun

Trabelsi

Ré

et al. 2021

Water

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“…Some other studies studies have evaluated the global warming effect on groundwater by limiting ourselves to the piezometric and/or hydrochemical approach (Al-Maktoumi et al 2018;Berhail 2019;Lachaal et al 2018). For this study to be original, we assessed the impact of climate change on the water resource of the Essaouira basin (Morocco) by combining several approaches such as hydroclimatology, piezometry, hyrochemistry and isotopy.…”

Section: Introductionmentioning

confidence: 99%

Quantitative and Qualitative Assessment of Groundwater from Semi-Arid Zones in the Context of Climate Change, Example of Essaouira Region, Morocco

Bahir¹,

Ouhamdouch²,

Ouazar³

et al. 2020

Preprint

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This study aims to assess the effect of climate change on water resources in semi-arid environments, taking the Essaouira region as an example. Analysis of climate data shows a downward trend in precipitation of 12 to 16% and an increase in air temperature of 2.3 °C over the past three decades. The piezometric study shows a continuous drop in the piezometric level which exceeds 12 m for the Cenomanian-Turonian aquifer, 17 m for the Plio-Quaternary aquifer, around 8 m for the Barremian-Aptian aquifer and 5 m for the Hauterivian. Hydrogeochemical analysis shows that (i) the groundwater mineralization is controlled by the dissolution of evaporitic and carbonates minerals, by the reverse ions exchange phenomenon, and by the marine intrusion, especially at Plio-Quaternary aquifer; (ii) the groundwater quality in the study area deteriorates gradually over time and space. The isotopic technique shows that (i) the groundwater recharge in the study area is ensured by precipitation of oceanic origin without significant evaporation and that (ii) climate change has no remarkable effect on the isotopic content of the groundwater of the study area. However, the results of this article reflect that the Essaouira basin is very vulnerable to climate change.

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“…For this reason, it is important to develop methods to summarize impacts as for example an index-based method (Baena or for evaluating the vulnerability as in the Ghiss-Nekor aquifer (Kouz et al 2017). The Mediterranean coast of Spain has an elevated number of aquifers with variable circumstances and different seawater intrusion processes (Custodio 2017b) but the risk can be extended to almost all the coastal areas in the western Mediterranean as for example is seen in North East Tunisia (Lachaal et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Groundwater and Global Change in the Western Mediterranean Area

Calvache¹,

Duque²,

Pulido-Velázquez³

2018

Environmental Earth Sciences

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Impacts of Global Changes on Groundwater Resources in North-East Tunisia: The Case of the Grombalia Phreatic Aquifer

Cited by 7 publications

References 13 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)

Quantitative and Qualitative Assessment of Groundwater from Semi-Arid Zones in the Context of Climate Change, Example of Essaouira Region, Morocco

Groundwater and Global Change in the Western Mediterranean Area

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