Conventional stability analysis approaches assume Containment Liner System (CLS) slopes to be planar surfaces, i.e. a straight line on a cross section drawing. This paper explores the variability of data collected on the planarity of CLSs, which was collected using Terrestrial Laser Scanning (TLS). Four landfill containment lining systems in the UK were scanned as part of this study including a temporary capping system, a vertical expansion (piggyback) landfill liner, a permanent capping system and side slope landfill lining system.
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