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 ...

Liquid collection layers used in landfills often comprise two sections with different slopes. Typically, one of the slopes ismuch steeper than the other one. The steeper slope is generally the downstream slope in a landfill cover and the upstream slope in ...