The design of a system for collecting leachate from a lined landfill site


  • J. Wong


A system for collecting leachate at the bottom of a landfill site is conceptualized, and the design parameters for the system are specified. The core of the system is a sloped low-permeability earthen liner that deflects downward infiltration to a series of collector tiles. Equations are derived that describe the drainage and leakage processes on top of the leaky liner. A simple graphical procedure is developed to quantitatively evaluate the collection efficiency of the system. With this procedure, some implications of various options available to landfill design are examined. Finally, the main assumptions used in the model are examined critically to explain qualitatively the limitations of the model.