Estimation of methane emission from whole waste landfill site using correlation between flux and ground temperature |
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| Authors: | Tomonori Ishigaki Masato Yamada Masanao Nagamori Yusaku Ono Yuzo Inoue |
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| Institution: | (1) Department of Environmental Solution Technology, Faculty of Science and Technology, Ryukoku University, 1–5, Yokotani, Seta-Oe, Otsu, Shiga 520–2194, Japan;(2) Research Center for Material Cycles and Waste Management, National Institute for Environmental Studies, 16–2, Onogawa, Tsukuba, Ibaraki 305–8506, Japan;(3) The Center for Environmental Science in Saitama, 914 Kamitanadare, Kisai, Kitasakitama, Saitama 347–0115, Japan |
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| Abstract: | A methodology to estimate a methane emission in a waste landfill site was developed. The methane flux at a waste landfill
site in summer, autumn, and winter was within the following ranges: from −1.3×10−2 to 16, from −6.4×10−2 to 7.5, and from −1.6×10−3 to 1.5×10−2 g-CH4 m−2 h−1, respectively. In those seasons, the mean methane emission rate and coefficient of variation were 1.1 g-CH4 m−2 h−1 ±290%, 0.57 g-CH4 m−2 h−1 ±347%, and 5.4×10−2 g-CH4 m−2 h−1 ±370%, respectively. These results simultaneously showed that fluctuations of methane emission from the landfill surface
were both of spatial and temporal variability. In each season, an exponential relationship was observed between the methane
flux density and the ground temperature. Total methane emissions were estimated to be 5.7×10−2, 7.1×10−3, and 1.7×10−3 g-CH4 m−2 h−1 in the summer, autumn, and winter surveys, respectively, using a temperature surrogated-kriging method. The results of this
study would improve upon the labor-intensive closed-chamber method, and could be a more practical way to estimate methane
emissions from waste landfills. |
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| Keywords: | Methane emission Waste landfill Closed-chamber method Kriging model |
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