Methane and carbon dioxide emissions from closed landfill in Taiwan

The atmospheric concentrations and emission rates of CH4 and CO2 were studied at three sites of the Fu-Der-Kan closed landfill and after as the multi-use recreational park in northern Taiwan. Atmospheric CH4 and CO2 concentrations of closed landfill were 1.7-4.6 and 324-409 ppm, respectively. CH4 and CO2 emission rates ranged from 8.8 to 163 mg m(-2) h(-1) and from 495 to 1531 mg m(-2) h(-1), respectively. Diurnal variation was noted with higher values at night than those in daytime. After creation of the park, atmospheric CH4 and CO2 concentrations were 1.8-3.1 and 332-441 ppm, respectively. CH4 and CO2 emission rates ranged from -1.1 to 2.3 mg m(-2) h(-1) and from -135 to 301 ing m(-2) h(-1), respectively. There were no notable diurnal variations in either atmospheric concentrations or emission rates. (c) 2007 Elsevier Ltd. All rights reserved.