Assessment of hydrogeological conditions in basement aquifers of the Precambrian Oban massif, Southeastern Nigeria

A combined analysis of lineament length density from radar imagery and surface resistivity data is used to assess the hydrogeological conditions in the Oban massif, Nigeria. The results show that the data guided the qualitative and quantitative estimation of some aquifer parameters. These include resistivity of the water bearing formations (280-740 Omega m), thickness (5-140 m), limited hydraulic conductivity (8.53-13.18 m/day) and transmissivity (410.65-725.88 m(2)/day) data. In addition, the lineament length density for the area ranged between less than 0.2 to slightly more than 0.4. Site evaluation for the location of productive boreholes/wells using a groundwater potential index (GWPI) indicates that areas with a GWPI of greater than 35 are consistent with relatively high yield.