Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Application of Ecosystem Model for Eutrophication Control in Coastal Sea of Saemankeum Area -1. Characteristics of Water Quality and Nutrients Released from Sediments-

새만금 사업지구의 연안해역에서 부영양화관리를 위한 생태계모델의 적용 -1. 해역의 수질 특성 및 저질의 용출 부하량 산정-

  • Kim Jong Gu (School of Civil & Environmental Engineering, Kunsan National University) ;
  • Kim Yang Soo (School of Civil & Environmental Engineering, Kunsan National University)
  • 김종구 (군산대학교 토목환경공학부) ;
  • 김양수 (군산대학교 토목환경공학부)
  • Published : 2002.07.01
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Abstract

To know characteristics of water quality in Saemankeum area, we were investigated the water quality of surface layer from July of 1999 to June of 2000. The concentrations of COD and chlorophyll a were in the range of $0.64\~6.40$ (mean 1.96)mg/L, $1.95\~51.55$ (mean 11,07)$mg/m^3$, respectively. The annual mean concentrations of DIN, DIP were found to be 21.182 $\mu$g-at/L and 0,655 $\mu$g-at/L respectively, which were exceeding second grade of seawater quality standard. The nitrogen ratio to the phosphorus was lower than 1. Therefore, nitrogen was playing an important role in phytoplankton growth as limiting factor in study area. Mean values of eutrophication index were exceeding 1, which was the eutrophication criteria. Especially Mankyung and Dongjin estuary were shown over 10 as eutrophication index. Therefore, Saemankeum area could be evaluated to possibility area for eutrophication. Released rate for ammonia nitrogen and phosphate phosphorus from sediments were 62.92 ${\mu}g-at/m^3/hr$ and 6.71 ${\mu}g-at/m^3/hr$, respectively.

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References

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