Investigation of the impact of Gadon Kaya gate dumpsite on the underground water system in Kano Metropolis using the passive electrical resistivity profiling

The rapid urbanization and population growth in Kano, Nigeria, have led to an increase in waste generation, with dumpsites such as Gadon Kaya becoming significant contributors to environmental pollution, particularly the groundwater system. This study focuses on assessing the impact of Gadon Kaya dumpsite on the groundwater system in Kano, employing electrical resistivity as a geophysical technique. The ADMT 300SX device was used for the data acquisition at the dumpsite. Three profiles were taken across the dumpsite and one additional profile 100m away from the dumpsite as a control profile. The first profile has a length of 30m and a sampling interval of 2m, while the second, third, and control profiles are 60m in length with a sampling interval of 5m respectively. The results from these profiles showed that the leachate had contaminated the top layer and the weathered basement with deeper leachate migration where fractures in the basement complex connect with the weathered layer. The results also showed the area of highly resistive material interpreted as the crystalline basement which is without water content. From other studies, we deduced that the contaminated zone is beyond the water table or the aquifer materials in the region.