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Estimation of Water Quality and Trophic State in the Hapcheon Lake

합천호 수질 및 영양단계에 대한 평가

  • Choi, Hyoung-Sub (Gyeongsangnam-do Province Government Public Health and Environmental Research Institute) ;
  • Cho, In-Cheol (Gyeongsangnam-do Province Government Public Health and Environmental Research Institute) ;
  • Byun, Jong-Hwan (Gyeongsangnam-do Province Government Public Health and Environmental Research Institute) ;
  • Moon, Byung-Hyun (Dept. of Environmental Engineering, ChangWon National University) ;
  • Heo, Jong-Soo (Division of Applied Life Science, Gyeongsang National University)
  • 최형섭 (경상남도보건환경연구원) ;
  • 조인철 (경상남도보건환경연구원) ;
  • 변종환 (경상남도보건환경연구원) ;
  • 문병현 (창원대학교 환경공학과) ;
  • 허종수 (경상대학교 응용생명과학부)
  • Published : 2003.03.31

Abstract

The yearly average water qualities of the Whang river, which flows into the Hapcheon lake, were COD $3.1{\sim}4.2\;mg/L$, T-N $2.460{\sim}3.550\;mg/L$ and T-P $0.111{\sim}0.201\;mg/L$ during $1996{\sim}2001$. The yearly average COD concentration of Hapcheon lake was increased from 1.9 mg/L (in 1996) to 2.7 mg/L (in 2000). However, T-N and T-P concentration of Hapcheon lake did not show increasing trend over the 6 year period During $1996{\sim}2001$, the yearly average concentrations of T-N, T-P were $1.383{\sim}1.792\;mg/L$, $0.018{\sim}0.023\;mg/L$ respectively. The correlation coefficients between chlorophyll ${\alpha}$ and T-N, T-P, rainfall intensity, water temperature were 0.382, 0.372, 0.589, and 0.526, respectively. Therefore, the rainfall and water temperature appeared to play an important role far the variations of chlolophyll ${\alpha}$ concentration in the Hapcheon lake. Trophic state of the Hapcheon lake were evaluated to be in the range of mesotrophic to eutrophic.

Keywords

Hapcheon lake;chlorophyl $1{\alpha}$;trophic state

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