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Hydrogeochemistry and evaluation of groundwater suitability for irrigation purpose in the Mornag region, northeastern Tunisia

Author

Listed:
  • Amor Ben Moussa

    (Research Laboratory of Environmental Science & Technologies
    Eau-Membrane et Biotechnologie de l’Environnement, CERTE
    High Institute of Environmental Science and Technology (HIEST) of Borj Cedria)

  • Sawsan Chandoul

    (Eau-Membrane et Biotechnologie de l’Environnement, CERTE)

  • Houcem Mzali

    (Centre de Recherches et Technologies des Eaux)

  • Sarra Bel Haj Salem

    (Research Laboratory of Environmental Science & Technologies)

  • Hatem Elmejri

    (Research Laboratory of Environmental Science & Technologies)

  • Kamel Zouari

    (University of Sfax)

  • Amor Hafiane

    (Eau-Membrane et Biotechnologie de l’Environnement, CERTE)

  • Habib Mrabet

    (Commissariat Régional au Développement Agricole de Ben Arous)

Abstract

In semiarid regions, salinization and anthropogenic contaminants are considered as the principal threat to groundwater resource availability. Consequently, the origin and processes of salinization should be identified, to take a sustainable measurement to mitigate these problems. In the present study, groundwater samples from 18 dug wells were collected during the sampling campaign carried out in May 2016 in order to identify the main natural and anthropogenic processes that control the quality of groundwater in the Mornag shallow aquifer (northeastern Tunisia) and to evaluate its suitability for agricultural irrigation purpose. This may create a clear database for decision maker to take suitable actions to sustainably manage the groundwater resources. The hydrogeochemical parameters (major ions concentration, pH, TDS, EC) were examined to assess the quality of groundwater and to identify the main mineralization processes. Permeability index (PI), percentage of sodium (%Na) and the ratio of sodium adsorption (SAR) were investigated to evaluate the groundwater suitability for irrigation. It has been demonstrated that the major ions abundance follows the order of sodium > calcium > magnesium > potassium and chloride > sulfate > bicarbonate > nitrate. Dissolution of evaporite minerals, such as halite, gypsum and anhydrite, and reverse ion exchange are the predominant processes of groundwater mineralization, generating the Cl–SO4–Ca and Na–Cl major water types. The calculated irrigation water quality index displayed that 55% of the Mornag groundwater samples are distinguished by elevated SAR and PI, suggesting their unsuitability for irrigation. So, the present study has provided a precious insight into the major geochemical processes occurring in the Mornag shallow groundwater and their suitability for irrigation which will support future management of these resources.

Suggested Citation

  • Amor Ben Moussa & Sawsan Chandoul & Houcem Mzali & Sarra Bel Haj Salem & Hatem Elmejri & Kamel Zouari & Amor Hafiane & Habib Mrabet, 2021. "Hydrogeochemistry and evaluation of groundwater suitability for irrigation purpose in the Mornag region, northeastern Tunisia," Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, Springer, vol. 23(2), pages 2698-2718, February.
    • Handle: RePEc:spr:endesu:v:23:y:2021:i:2:d:10.1007_s10668-020-00696-z
    DOI: 10.1007/s10668-020-00696-z
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    References listed on IDEAS

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    1. Wilcox, L. V., 1948. "The Quality of Water for Irrigation Use," Technical Bulletins 170282, United States Department of Agriculture, Economic Research Service.
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    Cited by:

    1. Yongxiang Zhang & Ruitao Jia & Jin Wu & Huaqing Wang & Zhuoran Luo, 2021. "Evaluation of Groundwater Using an Integrated Approach of Entropy Weight and Stochastic Simulation: A Case Study in East Region of Beijing," IJERPH, MDPI, vol. 18(14), pages 1-18, July.

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