Methane fluxes from a Swedish landfill determined by geostatistical treatment of static chamber measurements

被引:83
作者
Börjesson, G [1 ]
Danielsson, Å [1 ]
Svensson, BH [1 ]
机构
[1] Linkoping Univ, Dept Water & Environm Studies, SE-58183 Linkoping, Sweden
关键词
D O I
10.1021/es991350s
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Methane emissions from a Swedish landfill were measured with a static chamber technique on three occasions during 1997. Methane flux rates ranged from -15.2 x 10(-3) to 40 g of CH4 m(-2) h(-1), and the spatial variability was high (CV = 343-386%). The spatial distribution of the emissions was estimated with the help of ordinary kriging, which is a spatial interpolation method. Three different approaches to estimate the total amounts were used: kriging on logarithm-transformed data, kriging with extremes excluded, and linear interpolation of measurements. These were compared between themselves and with the flux rates measured with a tracer gas technique. While the latter gave an estimate of 41 kg of CH4 h(-1) from the landfill (with small variations), the highest possible estimate obtained with static chambers and geostatistical methods was 9.7 kg of CH4 h(-1). The conclusion is that static chambers can hardly be trusted for making more than small-scale estimates of landfill gas emissions.
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收藏
页码:4044 / 4050
页数:7
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