Landfill basal liner

The regulations for landfill basal liners and landfill capping systems, a field of special interest for HDPE geomembrane application and of exem-... 

August H and Liiders G (1997) Investigation to the long-term integrity of protective materials for geomembranes in landfill basal liners. In August H et al. (eds) Advanced landfill liner systems. Thomas Telford Publishing, London,... 

Cross-section of basal liner and capping in MSW landfill systems. 

For a basal liner which corresponds approximately, for example, to the requirements for German landfill liners, i.e. = 0.90 m,k= 10 m/s, and for a hole with R = 5 mm, a flow rate q = 1200 is expeeted based on Model III and Table 7.8 at an accumulation height of 5 m. An area with a radius of = 3 m of lateral flow in the interface is expected under the geomembrane (Wu 1994). 

For landfill construction, special test conditions have been agreed upon. The test period should be 1000 hours. For testing the protective efficiency in basal liners, a test temperature of 40 °C and a test load have to be set which exceed the maximum load expected in the landfill by a factor of 1.5. Where no reliable data are available, 15 kN/m is assumed for the specific gravity of the waste. The increased load and to certain extent the increased... 

---