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Assessing Groundwater Vulnerability to Contamination in a Semi-Arid Environment Using DRASTIC and GOD Models, Case of F’kirina Plain, North of Algeria

Abstract : Groundwater is vulnerable to contamination by anthropological activities. Vulnerability mapping is considered as a fundamental aspect of groundwater management. The aim of this study was to estimate aquifer vulnerability by applying the DRASTIC and GOD models in F’kirina agricultural plain northern Algeria. The DRASTIC model uses seven environmental parameters (depth to water, net recharge, aquifer media, soil media, topography, impact of vadose zone, and hydraulic conductivity) to characterize the hydrogeological setting and evaluate aquifer vulnerability. GOD is an overlay and index method designed to map groundwater vulnerability over large regions based on three parameters (groundwater confinement, overlying strata, and depth to groundwater). The information layers for models were provided via geographic information system. The results showed that the DRASTIC model is better than GOD model to estimate groundwater vulnerability to pollution in the measured wells. For DRASTIC model, the correlation coefficient between vulnerability index and nitrate concentration was 68 % that was substantially higher than 28 % obtained for the GOD model. We can conclude that nitrate concentration should be a suitable parameter to investigate the accuracy of the DRASTIC and GOD models.
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https://hal.umontpellier.fr/hal-03332153
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Soumis le : jeudi 2 septembre 2021 - 14:56:48
Dernière modification le : vendredi 5 août 2022 - 11:00:39

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  • HAL Id : hal-03332153, version 1

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Salima Djoudi, Fouad Boulabiez, Séverin Pistre, Belgacem Houha. Assessing Groundwater Vulnerability to Contamination in a Semi-Arid Environment Using DRASTIC and GOD Models, Case of F’kirina Plain, North of Algeria. IOSR Journal of Environmental Science, Toxicology and Food Technology (IOSR-JESTFT), International Organization Of Scientific Research (IOSR), 2019, 13 (7), pp.39-44. ⟨hal-03332153⟩

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