Quantitative analysis of physical and geotechnical factors affecting methane emission in municipal solid waste landfill |
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| Authors: | Dawit Tecle Jejung Lee Syed Hasan |
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| Institution: | (1) Department of Geosciences, University of Missouri Kansas City, 5100 Rockhill Road, Kansas City, MO 64110, USA |
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| Abstract: | The amount of methane that vent from landfills is dependent on the physical, chemical and biological components of the soil
cover. Especially moisture content and temperature of the soil are known as the major controlling factors. In situ moisture
content measurement is very critical because the moisture content of the soil continuously changes within minutes to hours
as a result of change in temperature. The presented study used time domain reflectometry to measure in situ moisture content
and analyzed moisture content, temperature and methane data of the landfill soil cover in a quantitative manner. Geotechnical
factors including soil grain size and uniformity coefficient of the soil were analyzed and their influence on moisture content
and methane emission was examined. The authors used kriging and polynomial regression methods to characterize the spatial
distribution of moisture content and methane emission. Methane emission showed good temporal correlation with soil temperature,
however, no significant relationship between moisture content and methane emission was observed. Spatial distribution of soil
attributes was also analyzed to examine its effect on those variables. The spatial pattern of moisture content was quite similar
to that of uniformity coefficient, C
u and that of clay content of the soil but strongly contrasted to that of methane emission. |
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| Keywords: | Geoscience Contaminant dispersion Geostatistics |
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