Hydraulic performance assessment of a multi-layered landfill cover system under constant water ponding

Abstract The engineered multi-layered cover system (MLCS) is used to minimize rainwater infiltration into the wastes accommodated in near surface waste disposal facility (NSDF). It important assess hydraulic performance of MLCS before deploying it field. For this purpose, an instrumented three-layered soil column representing was subjected 1.5 m constant ponding head for 400 days. variation volumetric water content and potential monitored as a function depth time. objective study understand long-term rate saturation different layers MLCS. Under ponding, time 0.3 layer, 0.6 drainage layer 1.0 barrier observed 24, 223 262 days, respectively. numerical analysis predicted comparable duration 25, 234 272 noted that simulation performed by using measured wetting parameters matched well with experimental observation. importance specific calibration sensors improve accuracy observations demonstrated. Percentage error estimation storage, clearly indicates measurements profile probe marginally better than 5TM measurements.