The focus of this paper is on applications (e.g. some leachate collection layers in landfills) where a drainage system consists of a geocomposite overlain by a sand layer. If the geocomposite does not have sufficient flow capacity to convey all the collected ...

The paper provides equations for the hydraulic design of liquid collection layers. A first series of equeations gives the maximum thickness of the liquid collected in a liquid collection layer. These equations are used in design to check that the maximum liquid ...