Understanding leachate flow in municipal solid waste landfills by combining time-lapse ERT and subsurface flow modelling – Part II: Constraint methodology of hydrodynamic models

摘要: Leachate recirculation is a key process in the operation of municipal solid waste landfills as bioreactors. To ensure optimal water content distribution, bioreactor operators need tools to design leachate injection systems. Prediction flow by subsurface modelling could provide useful information for such However, hydrodynamic models require additional data constrain them and assess parameters. Electrical resistivity tomography (ERT) suitable method study infiltration at landfill scale. It can spatially distributed which constraining models. this geophysical does not allow ERT users directly measure waste. The MICS (multiple inversions clustering strategy) methodology was proposed delineate area precisely during time-lapse survey order avoid use empirical petrophysical relationships, are adapted heterogeneous medium shapes extracted with were used assessing constraint developed paper tested on two models: an equilibrium model where, within estimated using single continuum approach non-equilibrium where dual approach. latter represents flows into fractures. Finally, provides insight identify advantages limitations Furthermore, we suggest explanation large volume detected when small injected.