Evaluation of the Effect of the Inland Pollution Source on Seawater and Oyster (Crassostrea gigas) after Rainfall in the Kamak Bay, Korea
Soon Bum Shin, Woo Suk Choi, Ji Hee Lee, Chi Won Lim
South Sea Fisheries Research Institute, NIFS, Yeosu 59780, Republic of Korea
In this study, we evaluated the effect of inland pollution sources on seawater and oyster (Crassostrea gigas) in Kamak bay after rainfall events. We analyzed the sanitary indicator microorganism such as coliform group, fecal coliform and Escherichia coli (E. coli) in the discharge water of major inland pollutants, seawater and oyster for 3 days after 27.6 and 58.0 mm rainfall events. According to these results, the range of coliform group and fecal coliform was 1.8-540 and <1.8-240 after 27.6 mm rainfall and was from <1.8 to 54,000 and from <1.8 to 9,500 MPN/100 mL after 58.0 mm rainfall in the discharge water of 5 waste water treatment plants. Also The range of fecal coliform and radius of impacted area of 10 contaminants (stream and domestic waste water) was from 63 to 230,000 MPN/100 mL and from 10 to 2,044 m, respectively. The fecal coliform of seawater at 16 stations in the designated area and 19 stations non-designated area ranged from <1.8 to 4.5 and from <1.8 to 540 MPN/100 mL, respectively. And The E. coli level of oyster at 5 station in the designated area ranged from <18 to 330 MPN/100 g.
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