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• W2978018492 abstract "The hilly region is famous in Benin for its water supply problems because it is located in an area composed only of crystalline rocks. It is experiencing acute difficulties of access to water resources. The present study aims to map fracture networks from satellite images and to use high resolution electrical resistivity tomography for their ground locations. The methodological approach used consists of the use of remote sensing techniques for the structural mapping of lineaments and the application of electrical resistivity tomography for the validation of hydraulically active lineaments. The use of the Selective Principal Component Analysis techniques and Sobel (7x7) directionalspatial filtering techniques made it possible to map the major lineaments. The validation of lineaments was made during several geophysical prospecting surveys of electrical resistivity tomography. The map generated as a result of satellite image processing has 638 linear structures ranging in size from 7 to 34 km and having two preferred directions N0 ° - N10 ° and N80 ° - N90 °. At the end of the geophysics, 13 lineaments were validated in major fractures with widths of the fissured-altered zone ranging from 15 to 40 m and whose depths are beyond 50m. The range of electrical resistivity characterizing these fractures varies from 100 to 800 (Ω.m).La region des collines est celebre au Benin pour ses problemes de ravitaillement en eau car situee dans une zone constituee uniquement de roches cristallines. Elle connait des difficultes aigues d’accessibilite aux ressources en eau. La presente etude a pour objectifs de cartographier les reseaux de fractures issues des images satellitaires et d’utiliser la tomographie de resistivite electrique pour leurs localisations au sol. L’approche methodologique utilisee est basee sur l’utilisation des techniques de la teledetection pour la cartographie structurale des lineaments et l’application de la tomographie de resistivite electrique pour la validation des lineaments hydrauliquement actives. L’utilisation des techniques de l’Analyse en Composantes Principales Selectives et des filtrages spatiaux directionnels de Sobel (7x7) ont permis d’etablir la carte des lineaments majeurs. La validation des lineaments a ete faite au cours de plusieurs travaux de prospection geophysique de tomographie de resistivite electrique. La carte generee a la suite du traitement des images satellitaires compte 638 structures lineaires dont la taille varie de 7 a 34 km et qui presentent deux directions preferentielles N0°- N10° et N80°- N90°. A l’issu destravaux de geophysique, 13 lineaments ont ete valides en fractures majeures avec des largeurs de la zone fissuree-alteree allant de 15 a 40 m et dont leurs profondeurs sont au-dela de 50 m. La gamme de resistivite electrique caracterisant ces fractures varie de 100 a 800 (Ω.m)." @default.
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• W2978018492 date "2019-09-30" @default.
• W2978018492 modified "2023-10-01" @default.
• W2978018492 title "Apport De La Télédétection Et De La Géophysique Dans La Cartographie Des Fractures Hydrauliquement Actives En Zone De Socle Au Centre-Ouest Du Benin" @default.
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• W2978018492 doi "https://doi.org/10.19044/esj.2019.v15n27p426" @default.
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