Characterization of the Dynamics of Leachate Contamination Plumes in the Surroundings of the Hulene-B Waste Dump in Maputo, Mozambique

The contamination of areas around solid urban waste dumps is a global challenge for the maintenance environmental quality in large centres developing countries. This study applied geophysical method (electrical resistivity) to identify leachate plumes subsoil and groundwater, as well describe their temporal dynamics (2020 2021) surroundings Hulene-B dump, Maputo, Mozambique. Eight 400 m electrical resistivity profiles were performed, four January 2020 May 2021 overlapped, data inverted with RES2D software. models predominantly indicate an E-W movement that are successively diluted saturated media creating zones less resistive anomalies (<4.2–8.5 Ω·m) possibly contaminated at two analysed seasons, between 2020–2021. thickness was higher summer (2020) 1 2, we associate it production migration mechanisms intense hot rainy season. Southwest profile 4b showed propagation anomalous on surface depth, which associated resulting from continuous decomposition continuously deposited new area southwest thus generating slow mainly winter (2021). spatial distribution during both seasons reduced significantly farther away deposit, revealing attenuating effect groundwater lithological substrate (Profile 3).