가막만 수질 및 저질 환경의 계절별 변동특성

Characteristics of seasonal fluctuation of water quality and sediment environment in Kamak bay

This study was performed to characterize the seasonal fluctuation of water quality and sediment environment from september, 1993 to August, 1994 in Kamak bay. Which was a productive area, but recently its fisheries conditions have been deteriorated because of increasing wastewater from municipal area, industry and autochthonous pollution by farm industry. In the survey of seawater quality, DO and COD concentrations were lowest in bottom layer at summer, but DIN, DIP and Si contents in same layer were higher than those in surface layer.And,which mean deminerization process of organic material in the bottom layer. N/P ratios were lower than 16 of Redfield ratio in the almost area with the range of 0.24~25.25. It mean that nitrogen is more controlling constituent than phosphorous in the growth of phytoplankton. Eutrophication indices mean that eutrophication area move from south to north entrance via northern-west inner area with seasonal change from winter to summer. In the survey of sediment environment, ignition loss(IL), chemical oxygen demand(COD) and total sulfide(S) were in the range of 5.02~21.11%, 1.80~44.73㎎/g-dry and 0.00~16.76㎎/g-dry, respectively. COD and S in surface sediment were highest at summer and autumn, respectively. And, they were higher than sediment standard in the northern-wast inner area, which mean heavily polluted conditions with organic constituents. And, COD and IL, COD and S showed relatively good relationship, whose coefficients were 0.65 and 0.73, respectively.