Hydrodynamic of Leachate Plume in Bioreactor Landfill – Contribution of 3D Time-lapse ERT

Leachate recirculation in bioreactor waste landfills aims at increasing the moisture content to optimize biodegradation. Waste is a heterogeneous and anisotropic porous media and water recirculation process is poorly known at the scale of the site. To better understand recirculation hydrodynamics, we used 3D time-lapse Electrical Resistivity Tomography (ERT). After optimization using numerical modeling, time-lapse ERT is applied at the field scale, during an experimental injection. We compared ERT with injected volumes to evaluate the sensitivity of time-lapse ERT to delineate the plume migration. Results show that time lapse ERT can be used to characterize some hydrodynamics properties of waste.