Evaluation for methane Emissions of the Intertidal Flat Sediments Using Enclosure Chamber Technique Method, Mid-west South Korea

Abstract

A closed flux chamber technique method was used for measuring methane (CH₄) gas from intertidal flat sediments at Taean in mid-west south Korea for 3 days of March 2013. Methane emissions were measured 3 sites (Hwang-do, Sindu-ri, and Sogeun-ri at Taean) during the ebb tide hours only. The 3 sites surface sediment were analyzed for size parameters in the laboratory by Fork analysis. And the methane fluxes were calculated based on the methane concentration rate (Gas Chromatography 6890 FID detector) of change measured inside a closed chamber. The methane fluxes were 0.23 mg m^-2 h^-1 (silty Sand, Hwang-do), 0.45 mg m^-2 h^-1 (Sand, Sindu-ri), and 0.60 mg m^-2 h^-1 (slightly gravelly Sand, Sogeun-ri), respectively. Methane fluxes in environment of surface layer possessed a correlation with sediment sizes. But the variations of methane fluxes was related to several factors depending upon field conditions such as amount of sunshine, bio-activity, water conductivity, sediment/air temperature, and tide level., and Sogeun-ri at Taean) during the ebb tide hours only. The 3 sites surface sediment were analyzed for size parameters in the laboratory by Fork analysis. And the methane fluxes were calculated based on the methane concentration rate (Gas Chromatography 6890 FID detector) of change measured inside a closed chamber. The methane fluxes were 0.23 mg m^-2 h^-1 (silty Sand, Hwang-do), 0.45 mg m^-2 h^-1 (Sand, Sindu-ri), and 0.60 mg m^-2 h^-1 (slightly gravelly Sand, Sogeun-ri), respectively. Methane fluxes in environment of surface layer possessed a correlation with sediment sizes. But the variations of methane fluxes was related to several factors depending upon field conditions such as amount of sunshine, bio-activity, water conductivity, sediment/air temperature, and tide level.