Generation and prediction of defect in HDPE GMB serving as landfill base barrier

Abstract

This study utilized electrical defects detection, correlation analysis, and regression analysis to conduct a prediction about the generation of defects in high-density polyethylene geomembranes (HDPE GMBs) in landfills. The findings revealed that the average defect density of 108 landfills was 15 defects/ha, and the average defect area was 122 cm²/ha. Four out of the 11 potential indicators, namely construction unit qualification, HDPE GMB thickness, drainage media type, and drainage system structure, had a significant impact on the density of installation and total defects. Prediction models of installation and total defects, using the four key indicators as independent variables, could reasonably predict the occurrence of initial defects. The model supports the accurate prediction of landfill risk and the identification of high-risk sites, which is crucial for hierarchical classification management and risk control.