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http://dx.doi.org/10.17663/JWR.2014.16.2.281

Evaluation of Basin-Specific CH4 emission flux from Intertidal Flat Sediments of Sogeun-ri, Taean, Mid-west Korea  

Lee, Jun-Ho (Korea Institute of Ocean Science and Technology, Korean Seas Geosystem Research Unit.)
Jeong, Kap-Sik (Korea Institute of Ocean Science and Technology, Korean Seas Geosystem Research Unit.)
Woo, Han Jun (Korea Institute of Ocean Science and Technology, Korean Seas Geosystem Research Unit.)
Kang, Jeongwon (Korea Institute of Ocean Science and Technology, Korean Seas Geosystem Research Unit.)
Lee, Dong-Hun (Korea Institute of Ocean Science and Technology, Korean Seas Geosystem Research Unit.)
Jang, Seok (Korea Institute Ocean Science and Technology, Maritime Security Research Center)
Kim, Seong-Ryul (Korea Institute Ocean Science and Technology, Maritime Security Research Center)
Publication Information
Journal of Wetlands Research / v.16, no.2, 2014 , pp. 281-291 More about this Journal
Abstract
In March to August 2013, the emission of gases ($CH_4$, VOC, $CO_2$, $O_2$, and LEL) was measured three times from the intertidal flat sediments at Sogeun-ri, Taean-gun, in the Mid-western seashore of Korea by using chamber method. After analyzing gas emission concentrations inside of flux enclosure chamber by using a GC equipped with Agilent 6890. The gas emission fluxes were calculated from a linear regression of the changes in the concentrations with time. The ranges of gas flux during the experimental period were $+0.06{\sim}+0.60mg/m^2/hr$ for $CH_4$, $+58.45{\sim}+95.58mg/m^2/hr$ for $CO_2$, $-0.02{\sim}-0.20mg/m^2/hr$ for $O_2$, and $-0.60{\sim}+0.65mg/m^2/hr$ for VOC, respectively. The flux measurement results revealed that $CH_4$ fluxes during March in the relatively low sediment temperature ($14.5^{\circ}C$) were significantly higher ($+0.60mg/m^2/hr$) than during June and August ($+0.06{\sim}+0.18mg/m^2/hr$) in high sediment temperature ($32.0{\sim}36.8^{\circ}C$). $CH_4$ flux to mean size of sediments and temperature of inner chamber exhibited strong positive correlation ($R^2=-0.97$ and $R^2=-0.89$, respectively).
Keywords
$CH_4$; Chamber; Gas absorption; Gas emission; Sediment parameters;
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