The use Of Resistivity Profiling Method In Grounwater Investigaton of a typical Basement Complex: A Case Study Of L.E.A Primary School-Dagiri In Gwagwalada Area Northcentral Nigeria

Geophysical technique involving resistivity profiling was used to map LEA Primary School-Dagiri in Gwagwalada Area of the Federal Capital Territory with a view to investigate the lateral variation in the subsurface resistivity. The qualitative interpretation results identified the presence of fractures across the surveyed area. Three traverses each measuring 500m, (representing an area of 250,000m 2 ) were mapped using wenner array configuration with electrode spacing of 50m for the profiling. Some prolific areas that can further be investigated for groundwater exploration using Vertical Electrical Sounding (VES) were delineated at the northeastern and Southern parts of the area. A resistivity range of 16Ωm - 1000Ωm was delineated, indicating a good groundwater potential area. Areas with resistivity values between 15Ωm and 265Ωm were however, marked as having good hydrogeologic significance in the region and consequently recommended for further investigation.