Mapping the Pollution Plume Using the Self-Potential Geophysical Method: Case of Oum Azza Landfill, Rabat, Morocco

Research at the Oum Azza Landfill in Rabat, Morocco, reveals that pollution from leachate does not extend beyond the landfill's immediate hydrogeological downstream due to natural drainage. Using self-potential (SP) geophysical methods, scientists mapped a pollution plume by analyzing soil surface potentials and cross-referencing with water table data, leachate properties (pH, redox potential, electrical conductivity), and landscape features. The study distinguished between electrokinetic (~30%) and electrochemical (~70%) components contributing to the observed potential range of 70 mV, demonstrating that while pollution is present downstream, it remains confined by natural drainage systems without spreading further under surrounding hills.

Touzani, M., Mohsine, I., Ouardi, J., Kacimi, I., Morarech, M., El Bahajji, M., Bouramtane, T., Tiouiouine, A., Yameogo, S., & El Mahrad, B. (2021). Mapping the Pollution Plume Using the Self-Potential Geophysical Method: Case of Oum Azza Landfill, Rabat, Morocco. Water, 13(7), 961. https://doi.org/10.3390/w13070961