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Article

Assessment of Geohydraulic Parameters in Coastal Aquifers Using Electrical Resistivity Tomography: A Case Study from the Chaouia Region, Western Morocco

by
Saliha Najib
1,2,*,
Ahmed Fadili
3,*,
Othmane Boualla
4,
Khalid Mehdi
1,2,
Mohammed Bouzerda
2,
Abdelhadi Makan
5,
Bendahhou Zourarah
2 and
Said Ilmen
3
1
Multidisciplinary Research and Innovation Laboratory, Polydisciplinary Faculty of Khouribga (FPK), Sultan Moulay Slimane University, Khouribga 25000, Morocco
2
Marine Geosciences and Soil Sciences Laboratory (LGMSS), Faculty of Sciences, Chouaïb Doukkali University, El Jadida 24000, Morocco
3
Polydisciplinary Faculty of Ouarzazate (FPO), Ibnou Zohr University, Ouarzazate 45000, Morocco
4
Geosciences, Environment, and Geomatic Laboratory, Faculty of Sciences, Ibnou Zohr University, Agadir 80000, Morocco
5
Team of Environmental Management and Civil Engineering (EMCE), National School of Applied Sciences (ENSAH), Abdelmalek Essaadi University, Tetouan 93000, Morocco
*
Authors to whom correspondence should be addressed.
Earth 2025, 6(4), 149; https://doi.org/10.3390/earth6040149 (registering DOI)
Submission received: 21 October 2025 / Revised: 23 November 2025 / Accepted: 25 November 2025 / Published: 27 November 2025
Versions Notes

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 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.
Keywords: geohydraulic parameters; hydraulic conductivity; effective porosity; transmissivity; Chaouia coastal aquifer; Morocco geohydraulic parameters; hydraulic conductivity; effective porosity; transmissivity; Chaouia coastal aquifer; Morocco

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MDPI and ACS Style

Najib, S.; Fadili, A.; Boualla, O.; Mehdi, K.; Bouzerda, M.; Makan, A.; Zourarah, B.; Ilmen, S. Assessment of Geohydraulic Parameters in Coastal Aquifers Using Electrical Resistivity Tomography: A Case Study from the Chaouia Region, Western Morocco. Earth 2025, 6, 149. https://doi.org/10.3390/earth6040149

AMA Style

Najib S, Fadili A, Boualla O, Mehdi K, Bouzerda M, Makan A, Zourarah B, Ilmen S. Assessment of Geohydraulic Parameters in Coastal Aquifers Using Electrical Resistivity Tomography: A Case Study from the Chaouia Region, Western Morocco. Earth. 2025; 6(4):149. https://doi.org/10.3390/earth6040149

Chicago/Turabian Style

Najib, Saliha, Ahmed Fadili, Othmane Boualla, Khalid Mehdi, Mohammed Bouzerda, Abdelhadi Makan, Bendahhou Zourarah, and Said Ilmen. 2025. "Assessment of Geohydraulic Parameters in Coastal Aquifers Using Electrical Resistivity Tomography: A Case Study from the Chaouia Region, Western Morocco" Earth 6, no. 4: 149. https://doi.org/10.3390/earth6040149

APA Style

Najib, S., Fadili, A., Boualla, O., Mehdi, K., Bouzerda, M., Makan, A., Zourarah, B., & Ilmen, S. (2025). Assessment of Geohydraulic Parameters in Coastal Aquifers Using Electrical Resistivity Tomography: A Case Study from the Chaouia Region, Western Morocco. Earth, 6(4), 149. https://doi.org/10.3390/earth6040149

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