Numerical Simulation of the Mass Flow of Leachate in a Municipal Waste Fill (Part 1) - Closed Recycling Flow Systems

This paper examines the use of numerical modelling in simulating the mass flux of leachate solute in an emplaced municipal waste subjected to a closed recycling flow. The simulation model comprises of a deterministic hydro-physical model, which effectively utilises the principle of conservation of matter to depict the average characteristics of the temporal mass of recycling leachate flow in an emplaced waste in a large-scale cell. Unlike in previous studies, the characteristic trend of the mass flux in various segments of the waste body is numerically and visually depicted. Although exact quantification of the temporal solute flux has not been achieved, the simulation results have been reasonable, and the 2-dimensional visualisation appears to enhance the understanding of the trend of solute mass transport within various layers of the waste fills.

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