Volume 9 Issue 1

Delineation of sub-surface structures using remote sensing and Aeromagnetic data: Case study of Federal University Oye-Ekiti campus

Olayiwola

Abstract

Remote sensing data comprising of Landsat 8 and aeromagnetic data have been used to delineate lineaments for structurally controlled groundwater prospect in the campus of Federal University Oye-Ekiti. Failed boreholes were observed in some places within the study area which had led to unavailability of municipal water supply. The Landsat 8 data was processed for edge sharpening enhancements and the aeromagnetic data was subdued to various data enhancement strategies such as the total magnetic intensity (TMI), reduction to equator (RTE), first vertical derivative, horizontal derivative and analytic signal were generated. Analysis and interpretation of the Landsat 8 were carried out in order to establish the lineament trends across the study area. The total magnetic intensity of the study area exhibited a magnetic signature ranging from 59.6 nT to 87.4 nT. Composite lineaments were generated from the Landsat 8 and Aeromagnetic lineaments and were recapitulated using rose diagrams. This revealed NE-SW as the major stretch with minor ones in NW-SE and E-W directions. Lineaments intercept were observed from the study area in between phase I and phase II and in phase III. The western part (phase III) of the region under study may be considered as the most probable zones for structurally controlled groundwater development.

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