인천연안 갯벌의 특성조사(Ⅰ) - 퇴적환경 및 유기물분포 = Study on the Characteristic of the Tidal Flat Sediment in Incheon Costal Area( I - Sedimentary Environments and Organic Matters Distribution

다국어 초록 (Multilingual Abstract)

This study was conducted to evaluate both seasonal and vertical characteristics of grain size distribution and organic matters in the tidal flat sediments of 8 costal areas in Incheon, in terms of analyzing the particle size, ignition loss, COD(chemical oxygen demand), acid volatile sulfide and TOC(total organic carbon) once in the spring and once in the fall in 2011. The tidal flat sediments in Incheon costal area consisted of predominantly silt and a mixed tidal flat of silt and sand as 95.3% of average contents. The seasonal grain size distribution in the surface sediment showed that the sand component tended to increase in the fall than in the spring. The vertical grain size distribution in the sediment core showed that the sand component tended to increase with the depth of sediment core in Dongmak site, whereas decrease in the sites of Janhwari, Sorae, and Northern Harbour. The seasonal concentration distribution of organic matters in the surface sediment was observed to be lower in the fall season compared with that in the spring season among all sediment sites except Hwangsando. An organism concentration of all the tidal flat sediments except Northern Harbour and Sorae areas was much lower than that of Japan Fisheries environmental standard and that of other regions in Korea, thus it seemed to be a good benthic ecological environment. The vertical concentration distribution of organic matters in the sediment core showed the similar trend among all costal areas in Incheon, and the most serious contamination of organic matters was observed at the sediment core in Northern Harbour near to industrial complex, where a concentration variation of organic matters in sediments with depth was most remarkable, therefore an organic pollution was considered the long-time sustained.

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