Hydrogeologic characterization of Owo and its environs using remote sensing and GIS

Résumé

The application of remote sensing and GIS in groundwater potential characterization has been internationally acclaimed. Owo and its environment lack sufficient groundwater data that will aid proper planning and management of the resource. For this reason, the groundwater potential study of Owo and its environment within the Basement Complex was carried out using remote sensing and GIS. LANDSAT ETM + (Bands 1–8) was acquired and the acquired imageries were processed using image processing software. For drainage mapping, bands 4-3-2 were combined in a RGB (123) format. For lineament extraction, the Digital terrain model (DTM) was generated from the SRTM data. The DTM was used in extracting lineaments in the study area. Groundwater potential of the area was calculated using score values assigned to each parameter studied. Results show that the lineament distribution in the study area is polymodal with peaks between 80°–100°. The East–West fractures are most prominent, with the broad, positive correlation in frequency and length of the lineament, suggesting that they are of geological origin. Lineament density of the area shows that Owo has higher lineament density of about 0.85 km/km 2 when compared other part of the study area. The density of lineament in the study area is attributable to the high fracturing that affected the Basement Complex area during the Pan-African Orogeny. In addition, the study further revealed that there are more lineament intersection around the southeastern part of Owo Township and Iyere. These areas are more favourable sites for groundwater accumulation. The drainage density map generated for the study area reveals that there are more rivers around Emure-Owo than other parts of the study area. In conclusion, the groundwater potential of the study area is from low to high.

Citer ce document

Accès au document

Ce document est hébergé sur son dépôt institutionnel d'origine.

Auteur(s)

Statistiques

Consultations : 1

Téléchargements : 0