Abstract
Measurements of 72 vertical electrical soundings (VES) using a Wenner-Schlumberger electrode array configuration were conducted on “Tghat-Oued Fez” district of Fez city. The purpose of this study is to identify voids inside basement, to prevent collapse and landslides in urban areas. The natural parameters acting to accelerate the phenomenon are mainly the tectonic activity, topography, and lithology. The studied area is close to the major active south rifain fault, marked by a steep slope and heterogeneous lithology, which is composed of a glacis surface, marls, and conglomerate deposits. We suspect the presence of week zones inside the marls layer because of cracks and fissures which sometimes appear even on the surface and the surrounding building's wall. This is due to the presence of gypsum which left many voids and cavities due to dissolution. Thirteen iso-resistivity maps resulting from VES measurements were created. The electrical survey has accurately detected and located high resistivity anomalies inside the conductive marly formation between 7 and 15 m depth. The survey results suggest that VES is a viable geophysical tool to explore electrical anomalous linked to medium vulnerable to lands movement.
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Oussama, J., Driss, E.A., Bouabid, E.M., Mohammed, C. (2022). Application of Electrical Resistivity Soundings to Identify Unstable Areas, “Tghat-Oued Fez” District as a Case Study (Fez—Morocco). In: Bennani, S., Lakhrissi, Y., Khaissidi, G., Mansouri, A., Khamlichi, Y. (eds) WITS 2020. Lecture Notes in Electrical Engineering, vol 745. Springer, Singapore. https://doi.org/10.1007/978-981-33-6893-4_101
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