Methane (CH
4) emissions and oxidation were measured at the Air Hitam sanitary landfill in Malaysia and were modeled using the Intergovernmental Panel on Climate Change waste model to estimate the CH
4 generation rate constant,
k. The emissions were measured at several locations using a fabricated static flux chamber. A combination of gas concentrations in soil profiles and surface CH
4 and carbon dioxide (CO
2) emissions at four monitoring locations were used to estimate the CH
4 oxidation capacity. The temporal variations in CH
4 and CO
2 emissions were also investigated in this study. Geospatial means using point kriging and inverse distance weight (IDW), as well as arithmetic and geometric means, were used to estimate total CH
4 emissions. The point kriging, IDW, and arithmetic means were almost identical and were two times higher than the geometric mean. The CH
4 emission geospatial means estimated using the kriging and IDW methods were 30.81 and 30.49 g m
?2 day
?1, respectively. The total CH
4 emissions from the studied area were 53.8 kg day
?1. The mean of the CH
4 oxidation capacity was 27.5 %. The estimated value of
k is 0.138 year
?1. Special consideration must be given to the CH
4 oxidation in the wet tropical climate for enhancing CH
4 emission reduction.
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