Water and Sediment Characteristics in the Shellfish Farms of the Western Part of Jinhae Bay

다국어 초록 (Multilingual Abstract)

The environmental characteristics in shellfish farms were investigated in the western part of Jinhae Bay, 1996. During summer, anoxia and high nutrient concentrations were found in the bottom waters of shellfish farms. The concentrations of particulate organic species in seawaters were enriched, showing an average 57.44μM for POC, an average 5.45μM for PON, and an average 0.42μM for PP. The sediments environment in the farms was very polluted. The concentrations of COD and AVS were more than 20 ㎎/g.dry and 0.5 ㎎/g.dry, respectively. The total sedimentation rate was high as an average 7.81 g/㎡ /day with organic matter contents of 26%. Oxygen consumption rate was similar to polluted area as an average of 439 ㎎/㎡/day. Nutrient release rates were an average of 8.25 ㎎/㎡/day for nitrogen and an average of 1.38 ㎎/㎡/day for phosphorous. The cluster analysis through environmental data in summer indicated that DO, nutrient in the bottom water, and AVS in the sediment were important factors to characterize the polluted environmental site.