Resistivity and induced polarization (IP) vertical electrical sounding data, and superficial self-potential (SP) survey, allow to evaluate the underground hydrological conditions around the new Salvador's sanitary landfill. The inversion of the combined IP-resistivity data allows to differentiate zones of large shaliness within the sandstones of Barreiras Formation. They also allow to map the aquifer substratum topography and the water table configuration, as well as to infer the general pattern of the underground natural flow of water. The SP data, acquired around the first two cells already constructed for waste disposal confirm the general underground flow and identified areas of recharge and discharge around the cells. The resulting hydrological-petrophysical picture may be a useful reference frame to check eventual environmental impacts in the future, caused by the waste disposal in the area.
Electrical resistivity; Induced polarization; Hydrology; Groundwater; Sanitary landfill
