마산만의 자생 유기물 저감을 위한 단순 박스모델의 적용

Reduction of Autochthonous Organics in Masan Bay using a Simple Box Model

  • 홍석진 (국립수산과학원 환경연구팀) ;
  • 이원찬 (국립수산과학원 환경연구팀) ;
  • 윤상필 (국립수산과학원 환경연구팀) ;
  • 박성은 (국립수산과학원 환경연구팀) ;
  • 조윤식 (국립수산과학원 환경연구팀) ;
  • 권정노 (국립수산과학원 환경연구팀) ;
  • 김동명 (부경대학교 생태공학과)
  • Hong, Sok-Jin (Environmental Research Team, National Fisheries Research Development Institute) ;
  • Lee, Won-Chan (Environmental Research Team, National Fisheries Research Development Institute) ;
  • Yoon, Sang-Pil (Environmental Research Team, National Fisheries Research Development Institute) ;
  • Park, Sung-Eun (Environmental Research Team, National Fisheries Research Development Institute) ;
  • Cho, Yoon-Sik (Environmental Research Team, National Fisheries Research Development Institute) ;
  • Kwon, Jung-No (Environmental Research Team, National Fisheries Research Development Institute) ;
  • Kim, Dong-Myung (Major of Ecological Engineering, Pukyung National University)
  • 발행 : 2007.06.30

초록

단순 박스모델을 이용하여 $2005\sim2006$년 마산만의 담수 유량, 염분, 영양염, COD등 물질 수지를 산정하였다. 담수수지 계산 결과 계절별로 $307.4\times10^3\sim1,210\times10^3m^3/day$로 이 시기에는 5 월이 가장 높았다. 하천과 생활하수에 의한 DIP과 DIN의 유입flux는 각각 $410.8\sim795.7kg/day$$4081.4\sim6525.3kg/day$ 범위로 마산만 내부에서 질소의 축적이 예상된다. 순 기초생산(net primary production)은 연 평균 $0.028mol/m^2/day$$14.4\sim517.8mgC/m^2/day$의 범위로 분포하였으며, 평균 $330.7mgC/m^2/day$ 였다. 해저 퇴적물로부터의 영양염 공급을 100% 제거할 경우 COD 농도는 2.79mg/L 에서 2.20mg/L로 감소하여 COD의 21.0%의 제거 효과가 있는 것으로 나타났다.

Simple box budgets models are useful tools to understand the phenomena of natural system and to provide an insight into the complex processes including physical, chemical and biological processes occurring in natural system. Budgets of fresh water, salt and nutrients were estimated in order to clarify the characteristics of seasonal material cycle in the Masan Bay. Outflow volume of freshwater into system was approximately $307.4\times10^3\sim1,210\times10^3\;m^3/day$. Inflow masses of DIP and DIN were approximately $410.8\sim795.7\;kg/day$ and $4081.4\sim6525.3\;kg/day$, respectively. DIN is expected to accumulate in the system. The removal of nutrients from bottom sediments will contribute to the reduction of 21.0% of COD concentration in the system.

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