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- W1530394255 abstract "Hydraulic conductivity is a measurement of the ease of movement of a fluid through amedium and is therefore a key parameter in the design of landfill leachate managementsystems. Hydraulic conductivity of landfilled wastes may be affected by severalfactors such as overburden stress from the weight of overlying waste, water content,the type, age and pre-processing of the waste, and the presence of landfill gas. Afurther factor that may affect leachate movement through wastes is the predominantlyhorizontal orientated structure of compacted wastes. This anisotropic structure mayresult in hydraulic conductivity in the horizontal direction being greater than that in thevertical direction. However existing research has been effectively limited toevaluating hydraulic conductivity in a single plane and so the presence of anisotropicflow in waste remains unproven. Consequently, modelling of leachate andcontaminant movement in landfills may be compromised by the use of isotropic, orassumed anisotropic, hydraulic conductivity values. The object of this research has been to assess for the first time the inherent anisotropyof two different waste samples by measuring and comparing the vertical and horizontalhydraulic conductivities over a range of stresses typical of landfill conditions. In thisthesis, factors affecting the measurement of hydraulic conductivity of wastes arediscussed, and details of the samples tested and test methodology are given. Theresults of the tests are shown and alternative test methods are discussed. The effects ofgas accumulation and pore water pressure on waste hydraulic conductivity encounteredduring testing are also reported as further research has developed from this importantfinding." @default.
- W1530394255 created "2016-06-24" @default.
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- W1530394255 date "2007-12-01" @default.
- W1530394255 modified "2023-09-27" @default.
- W1530394255 title "Evaluation of the vertical and horizontal hydraulic conductivitiesof household wastes" @default.
- W1530394255 hasPublicationYear "2007" @default.
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