Evaluation of diffusive gas flux through covers with a GCL

摘要

The main purpose of geosynthetic clay liners (GCLs) used in cover systems is to limit the infiltration of water to the wastes disposed underneath. In many situations however, the cover system should also be able to limit gas flux, so that undesirable products emitted from the wastes, like radon or methane, will not escape to the atmosphere. In other situations, covers may have to present oxygen from the atmosphere to come into contact with reactive materials, such as sulphidic tailings that could otherwise generate acid.