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Simulation of leachate migration in leaky aquifers


A two-dimensional cross-section finite difference model is presented to simulate density dependent leachate migration in leaky aquifers. Unlike existing models, a new approach is adopted to couple the groundwater-flow equation and the hydrodynamic dispersion equation with the elimination of the intermediate step of calculating velocities. The concept of the reference density is employed, permitting increased accuracy (over pressure-based models) in the representation of the transport process. The model is then used to study the effect of several hydraulic and transport parameters on the flow pattern and plume migration which are found to be very sensitive to most of these parameters. Equiconcentration and equipotential lines are overlapped to provide a better understanding of the coupling effect.

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Sherif, M.M., Hassan, A.E. & Singh, V.P. Simulation of leachate migration in leaky aquifers. Water Resour Manage 8, 265–284 (1994).

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Key words

  • Groundwater
  • pollution
  • finite difference method
  • dispersion
  • density dependent