Sub-surface characteristics and evaluation of groundwater potential zones of IDI-Ayunre Southwest, Nigeria

The groundwater potential areas in Idi-Ayunre, Ibadan, Oyo state was estimated using vertical electrical sounding and geographic information system, also the subsurface characteristics was described using the two methods. The survey was done using VES with twenty-one points to estimate the groundwater perspective. The results of the analysis are presented in the form of curves, tables, and maps. The analysis and interpretation of the VES results were processed using WINRESIT and ARGIS 10.0. There is fracture zone at 7.8 m depth in VES10with resistivity value of 21.2 Ωm which indicate the existence of groundwater at that point. When considering the whole VES points on average, the analysis show that the groundwater prospective in this study area is low. The main aquifer units suited for groundwater exploration in this area as indicated in the results are the vertical electrical soundingsVES 1 and VES 16 respectively.