Jeju Eoseungsaeng lake which is a main water resource of Eoseungsaeng water treatment plant(Q=15,000 m3/d) experienced high chromaticity(40 CU) and pH(9.46) in 2013. This could decline customer's confidence on drinking water quality unless proper identification and removal of chromaticity were implemented. To find cause of chromaticity, water monitoring on various water parameters including TOC, algal cell count, Chl-a, turbidity, SS, conductivity, etc. were implemented. Iron and manganese were excluded from the cause of chromaticity due to its low concentration (i.e., < 0.02 mg/L). Correlation among water parameters showed that relationship between algal cell count and chromaticity was the highest(R=0.43), which suggested that presumably the main reason of chromaticity occurrence in Jeju Eoseungsaeng lake was algae.

1. 서 론
 2. 연구대상 및 방법
 3. 결과 및 고찰
  3.1 원수수질 현황
  3.2 조류 특성 분석
  3.3 색도 발생원인 추정
 4. 결 론
 References

• 이정훈(제주대학교 환경공학과) | Jeonghoon Lee
• 이희남(제주대학교 환경공학과, 제주특별자치도) | Heenam Lee
• 김진근(제주대학교 환경공학과) | Jinkeun Kim Corresponding author