새만금 외해역 표층 해수 수질의 시공간적 특성

Temporal and Spatial Characteristics of water quality for Surface water in Saemankeum outer sea

To evaluate temporal and spatial characteristics of water Quality for surface water in the Saemankeum outer sea, chemical measurement and analysis were conducted on 14 point during february, April, July and October in 1998. Chemical oxygen demand(COD) was appear to 2.06mg/l in yearly mean, it's belong to grade of II in water Quality standard for seawater, Characteristics of temporal and spatial variations were not appear greatly variation, but shows somewhat low concentration in autumn. Total suspended solid(TSS) was appear to 16.83mg/l in yearly mean, seasonal variation show a tendency to increase in winter and decrease in summer. It seems to be mainly affected by the vertical convection by cooling effect and turbulence by the strong wind. In nutrients, dissolved inorganic nitrogen(DIN) and phosphate phosphorus shown grade of II in water Quality standard for seawater. Seasonal variations show a tendency to increase in winter and decrease in summer. It has a similar to that of TSS, but have nothing to do with variation of chlorophyll a. Therefore, concentration of nutrients seems to be affected by resuspension of nutrient from bottom. For correlation analysis among water Quality constituents, temperature, one of factor of seasonal variation, shown interrelationship for salinity, dissolved, TSS and dissolved inorganic nitrogen. Eutrophication indices were in range of 0.68~2.50. In whole, states of eutrophication were evaluate to low level except for winter and spring.