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Landfill Storage Sites For The Underground Water Resources

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Increasing numbers of natural resources are consumed by modern society, causing growing demands of waste disposals at the same time. Statistical results showed that landfill facilities had been used as a main solid waste disposal approach in the past decades. Landfill leachate is the one of primary concerns of landfill operation. Application of reliable barriers underneath waste disposal sites to protect underground water resources has become an important research subject. However, any defect of liner systems can put environment at risk due to the possible leakage. A large number of factors could cause the landfill liner failures in different ways. One of the main factor is provided by not enough interface shear strength of the composite liner.
Landfills liner is composed of various geosynthetic and soil components (Jogi, 2005). For domestic waste systems, the basic structure unit of landfill liner is normally regarded as geosynthetic layer in contact with compacted clay layer (CCLs) for municipal solid waste landfill. Historical statistics show side slope liner failures caused by liner sliding able to happen at the interface between CCLs and geomembrane when the interface have a low shear resistance. The shear strength is probably further decreased by the presence of water (Reddy 1999). Generally the local clay can be used as compacted clay liner for economic considerations. Leda clay is a typical type of sensitive marine clay which covers major area of eastern Ontario

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