Hydraulic properties of waste and cover soil from Kimpo Metropolitan Landfill were experimentally measured by laboratory
tests. The degree of compaction was changed to identify the effect on hydraulic conductivity, field capacity, and permanent wilting
point. Properties were utilized in developing a reliable numerical tool for leachate analysis. HELP, a simulation model for hydrologic
evaluation of landfill performance, was adopted for that purpose. For calibration, results from simulation using the parameter
values measured by laboratory tests were compared against the field data. The model was applied to predict the leachate level
change according to the degree of compaction and cover soil thickness variation. It was found that the increase in the degree of
compaction for intermediate cover soil and waste results in the decrease of field capacity and hydraulic conductivity, hence, the
increase of leachate level. The effect of cover layer thickness on the leachate level was minor. Based on the findings from laboratory
and numerical experiments, a guideline for reclamation practice was recommended. # 2002 Elsevier Science Ltd. All rights
reserved.