ABSTRACT
Landfill capping is a key component in engineered solid waste landfills. The primary purpose of this landfill capping is to isolate waste from the environment (Pease & Stormant 1996), and prevent infiltration of precipitation into the waste (Koerner & Daniel 1992). As a result the production of landfill leachate is reduced. Moreover, landfill capping is effective at preventing bio intrusion and gas emission (Bozkurt et al. 2001) while increasing the aesthetic appearance (Ng & Ramsey 2012) of the landfill. Capillary Barrier Cover System (CBCS) has been proposed as a low-cost and technically feasible solution for limiting water infiltration and controlling seepage at solid waste landfills. The CBCS can be composed of a finegrained layer overlying a coarser-grained sublayer.
