%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Clément, R.
%A Oxarango, L.
%A Descloitres, Marc
%T Contribution of 3-D time-lapse ERT to the study of leachate recirculation in a landfill
%D 2011
%L fdi:010053364
%J Waste Management
%@ 0956-053X
%M ISI:000287833800009
%N 3
%P 457-467
%R 10.1016/j.wasman.2010.09.005
%U http://www.documentation.ird.fr/hor/fdi:010053364
%> http://www.documentation.ird.fr/intranet/publi/2011/03/010053364.pdf
%V 31
%W Horizon (IRD)
%X Leachate recirculation is a key process in the operation of municipal waste landfills as bioreactors. It aims at increasing the moisture content to optimise the biodegradation. Because waste is a very heterogeneous and anisotropic porous media, the geometry of the leachate plume recirculation is difficult to delineate from the surface at the scale of the bioreactor site. In this study, 3-D time-lapse electrical resistivity tomography (ERT) was used to obtain useful information for understanding leachate recirculation hydrodynamics. The ERT inversion methodology and the electrode arrays were optimised using numerical modelling simulating a 3-D leachate injection scenario. Time-lapse ERT was subsequently applied at the field scale during an experimental injection. We compared ERT images with injected volumes to evaluate the sensitivity of time-lapse ERT to delineate the plume migration. The results show that time-lapse ERT can accomplish the following: (i) accurately locate the injection plume, delineating its depth and lateral extension; (ii) be used to estimate some hydraulic properties of waste.
%$ 062 ; 021