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Keywords = Chaouia coastal aquifer

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17 pages, 3565 KB  
Article
Assessment of Geohydraulic Parameters in Coastal Aquifers Using Electrical Resistivity Tomography: A Case Study from the Chaouia Region, Western Morocco
by Saliha Najib, Ahmed Fadili, Othmane Boualla, Khalid Mehdi, Mohammed Bouzerda, Abdelhadi Makan, Bendahhou Zourarah and Said Ilmen
Earth 2025, 6(4), 149; https://doi.org/10.3390/earth6040149 - 27 Nov 2025
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Abstract
This study investigated the geohydraulic properties of the Chaouia coastal aquifer in western Morocco through two-dimensional Electrical Resistivity Tomography (ERT). Five resistivity profiles were carried out and inverted to define subsurface lithology and estimate hydraulic conductivity (K), effective porosity (Φeff), and [...] Read more.
This study investigated the geohydraulic properties of the Chaouia coastal aquifer in western Morocco through two-dimensional Electrical Resistivity Tomography (ERT). Five resistivity profiles were carried out and inverted to define subsurface lithology and estimate hydraulic conductivity (K), effective porosity (Φeff), and transmissivity (T) using the empirical relationships.The obtained results showed that K ranged from 1.2 m/day to more than 217.4 m/day, Φeff varied between 20.3% and 47.8%, and T varied between 0.4 and 159.3 m2/day. These findings highlight considerable lithological variability, with low to intermediate values in Plio-Quaternary deposits and higher values in fractured Cretaceous marly limestones. Comparison with available pumping test data and numerical modeling validated the consistency of the ERT-derived estimates with independent hydrogeological evidence. The present study demonstrates that, in areas where pumping tests are limited or impractical, ERT provides an effective, non-invasive, and cost-efficient tool for aquifer characterization. These findings offer valuable insights for groundwater assessment and support the development of sustainable management strategies to mitigate overexploitation and seawater intrusion in vulnerable coastal aquifers and propose sustainable strategies for conserving these water resources. Full article
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