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Résumé :
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The evaluation of the performance of compacted soil landfill Liners is complicated by the uncertainty associated with the hydrogeologic properties of the soil and the site-specific design conditions. This note examines the implication of constructing a liner using varying numbers of lifts. The sensitivity of the leakage flux and equivalent hydraulic conductivity, K-E, are assessed in response to alternative design and site-specific conditions for the percolation rate of water into the waste layer, the spacing of the leachate collection system, and the magnitude and variability of the hydraulic conductivity of the soil liner. For a soil exhibiting the same statistical properties, a liner constructed in a series of lifts will provide a more efficient barrier to leachate flux and a lower equivalent hydraulic conductivity than a liner constructed as a single lift. While leakage flux can be influenced to some degree by site-specific conditions, the sensitivity of K-E to these changes is relatively small.
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