Methane and carbon dioxide emissions from Sungai Sedu open dumping during wet season in Malaysia

► Geospatial means estimated using kriging and IDW methods were roughly identical. ► CH4 to CO2 emission ratio was 39.5%. ► The IDW method was considered to be more accurate than the kriging method. ► CH4 generation rate constant was 0.0033 y−1 for an open dumping during wet season in Malaysia.