ASSESSMENT OF GROUNDWATER POTENTIAL AND AQUIFER VULNERABILITY USING MCDA AND DRASTIC ANALYSIS WITHIN AKURE METROPOLIS, SOUTHWESTERN NIGERIA
Abstract
Groundwater potential and aquifer vulnerability in some part of Akure metropolis southwestern Nigeria was carried out, using electrical resistivity survey, to identify and determine possible areas for groundwater development and its aquifer vulnerability. Geoelectric parameters from electrical resistivity survey helped in characterizing, assessing and evaluating the hydrogeological condition of aquifers in the area. A way of integrating all aquifer parameters significant to evaluating the groundwater potential and vulnerability, using the principle of Drastic and Multi-Criteria Evaluation Techniques, was proposed. The investigated area was classified into low, moderate and high groundwater prospect and aquifer vulnerability using the proposed method. The approach allows the weighting and integrating of all aquifer parameters in order of their significance to aquifer vulnerability. Integration of geophysical method with the proposed data management method provided a cost effective, dependable and accurate characterization and evaluation of an aquifer system.
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