Original Papers
28 June 2023
Vol. 12 No. 2 (2023)
https://doi.org/10.7343/as-2023-635

Numerical simulation of seawater intrusion in the lower Seybouse aquifer system, Algeria

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Coastal aquifer, seawater intrusion, MODFLOW-MT3DMS, overexploitation, vulnerability
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Authors

Samir Hani
Water Resources and Sustainable Development Laboratory (REDD), Badji Mokhtar Annaba University, Algeria.
Fayçal Toumi
faycaltoumi@hotmail.com
https://orcid.org/0000-0002-2306-8484
Water Resources and Sustainable Development Laboratory (REDD), Badji Mokhtar Annaba University, Algeria.
Nabil Bougherira
Water Resources and Sustainable Development Laboratory (REDD), Badji Mokhtar Annaba University, Algeria.
Isam Shahrour
Civil Engineering and Geo Environment Laboratory (LGCgE), University of Lille, Villeneuve d’Ascqcedex, France.
Azzedine Hani
https://orcid.org/0000-0002-5904-0272
Water Resources and Sustainable Development Laboratory (REDD), Badji Mokhtar Annaba University, Algeria.

Seawater intrusion represents a high risk for the water supply, the agriculture and industry activities in the lower Seybouse region of North-Eastern Algeria. In order to analyze this risk, a three-dimensional model was developed using the MODFLOW and MT3DMS codes to predict seawater intrusion in the coastal aquifer. The application of this model indicates that the groundwater withdrawals result in a continuous decrease of the water level and in an increase of chloride concentration. Moreover, the salt front could progress by 300 to 2500 m in the land. These results show the necessity of adequate measures for the protection of the aquifer. Numerical predictions for 2045, considering an increase of groundwater withdrawals by 20%, show a fairly significant decrease in water levels, up to -6 m with respect to the mean sea level, and an increase of Cl- concentrations up to about 10 km inland.

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Numerical simulation of seawater intrusion in the lower Seybouse aquifer system, Algeria. (2023). Acque Sotterranee - Italian Journal of Groundwater, 12(2), 9-17. https://doi.org/10.7343/as-2023-635
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