RE-APPRAISAL OF THE PROCEDURE OF QUALITATIVE INDUCED POLARISATION VALIDATION OF GROUNDWATER PROSPECTS AT THE SOUTHERN PHASE II DEVELOPMENT, GIDAN KWANO CAMPUS, MINNA, NIGERIA
Résumé
It is a desired situation if complementary geophysical data is available to aid deductions made based on analysis of a body of core data, like a corpus of vertical electrical soundings, say. At the southern Phase II Development of the Gidan Kwano Campus, Federal University of Technology, Minna, complementary induced polarisation data was acquired in tandem with vertical electrical sounding data in a dedicated survey program. The approach of the initial qualitative induced polarisation validation of the groundwater-resource deductions based on the interpretation of the sounding data fixed the number of groundwater prospects at 57 out of a total of circa 309 stations surveyed. This study concerns adopting a different course of qualitative induced polarisation validation that was de-emphasized in the earlier study and observing if there are disparities in the deductive outcomes regarding assured groundwater locations at the study area; this approach emphasizes strong bearings on “zero-weighted” induced polarisation values in the correlation regime. Thus, the number of groundwater prospects is now fixed at 47 post-induced polarisation validation from a list of soundings tagged as 89 prospect locations out of a total of circa 309 stations surveyed. There are circa 19 points that are tagged as coincident points in the earlier study and in the one herein. In order to solve the vexing groundwater problem plaguing the developed tranche of the Gidan Kwano Campus, it is recommended that the University adopts the idea of a multi-well single-output water scheme whence the survey locations flagged herein for their characteristic and comparatively deep-seated fractures should be exploited for their groundwater resource. Any planned drilling regime based on the recommendation herein must be guided by the full-length paper that is the work herein so as to pinpoint those locations where induced polarisation-data regimes actually point to very dependable groundwater exploitable potentials.
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