Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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Analysis on Trends and Major Impact Factors of Water Quality Dynamics in the Gab-Cheon River, Daejeon, Korea

대전 갑천의 수질변화 경향 및 주요 수질 영향 인자 분석

  • Lee, Gayoung (Department of Environmental Engineering, Chungnam National University) ;
  • Seo, Dongil (Department of Environmental Engineering, Chungnam National University)
  • Received : 2015.09.16
  • Accepted : 2015.09.28
  • Published : 2015.09.30
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Abstract

This study analyzes water quality change trends in three major rivers in Daejeon and effect of discharge from Daejeon Wastewater Treatment Plant between 1992 and 2014. As of 2014, COD concentration in the Gab-cheon-A station is in level VI for Korea river water quality standard while BOD and TP are in level III. As expansions of the treatment plant, water quality in the Gab-cheon River has been improving accordingly. However, during the study period, TN concentrations of the headwater and the most downstream locations of the Gab-cheon River have increased about twice and three times, respectively. It was estimated that the treatment plant is responsible for 35%. 46%, 76% and 63% of BOD, COD, TN and TP loadings of the Gab-cheon River, respectively. It was also estimated that small tributaries and nonpoint sources are responsible for 54% and 47% of BOD and COD loadings of the Gab-cheon River. Therefore, it is recommended to further reduce nutrient loadings from the treatment plant and also reduce surface runoff organic loading from nonpoint sources including small tributaries and storm sewers.

대전 3대 하천의 1992년 1월부터 2014년 12월까지 수질변화 추이를 분석하고, 대전하수처리장의 방류수가 갑천의 수질환경에 미치는 영향을 분석하였다. 2014년 대전의 갑천3 지점의 BOD, COD, TN, TP 연평균 농도는 각각 1.53, 3.36, 2.16, 0.03 mg/L로서 우리나라 하천수질기준으로 Ib 급수의 수준을 나타내나, 하수처리장 방류수가 유입된 이후 금강으로 유입되기 직전 지점인 갑천A 지점에서는 각각 3.43, 11.51, 8.62, 0.12 mg/L 수준으로써 COD는 매우 나쁜 수준인 VI 급수의 수준에해당하며 BOD와 TP는 III 급수의 수준을 나타낸다. 대전하수처리장이 가동을 시작한 1994년 이전의 수질에 비하여 고도처리 시설이 완공된 2013년 이후의 수질을 비교하였을 경우, 전체적으로 수질이 개선되었으나, 갑천 최상류 봉곡교 지점 및 최하류 지점의 TN농도는 각각 2배 및 3배가량 증가한 것으로 조사되었다. 갑천 최하류의 수질에 기여하는 오염부하량 분포를 산정한 결과 대전의 하수처리장 방류수가 TN, TP, BOD와 COD 총부하량의 각각 76%, 63%, 35% 및 46%를 차자하는 것으로 나타났다. 따라서 금강의 수질을 개선하기 위한 갑천의 수질관리는 TN 및 TP 등 영양염류는 하수처리장의 방류수를 추가 개선하는 것이 바람직한 것으로 판단되며, BOD 및 COD를 포함하는 유기물은 하수처리장 방류수의 오염부하와 함께 위 부하량의 각각 54% 및 47%를 차지하는 각종 소하천 및 우수거등 비점오염원에서 유입되는 부하량을 함께 관리해야 할 필요성이 있다고 분석된다.

Keywords

References

  1. Jones, J. R., McEachern, I. P. and Seo, D., "Empirical evidence of monsoon influences on Asian Lakes," Aquat. Ecosyst. Health & Manage., 12(2), 129-137(2009). https://doi.org/10.1080/14634980902907342
  2. Jeong, C. H. and Moon, B. J., "Hydrochemical and Isotopic Characteristics of Major Streams in the Daejeon," Econ. Environ. Geol., 42(4), 315-333(2009).
  3. Korea Ministry of Environment, 2013 Sewage Statistics (2014) (www.me.go.kr/home/web/policy_data/read.do?menuId=10264&seq=6436).
  4. Ministry of Environment, Water Quality and Aquatic Ecosystem Conservation Act(2015).
  5. Samann Engineering and Hyundai Engineering, "Report of Geum River Master Plan (The Geum River, Miho-cheon, Gab-cheon, Youdeung-cheon)," Daejeon Regional Construction Management Administration(2011).
  6. Ministry of Environment Geum River Basin Office, "Water Quality Management Plan of Gab-cheon River Area (2007-20011)," National Archives of Korea Home Page, http://www. archives.go.kr(2007).
  7. Ministry of Environment Water Environment Information System Home Page, http://water.nier.go.kr(2015).
  8. Korea Meteorological Administration Home Page, http://www.kma.go.kr,(2014).
  9. Daejeon Metropolitan City Facilities Management Corporation Home Page, www.djsiseol.or.kr(2015).
  10. Seo, D., "A Necessity of Management of Small Streams for National River Management," Magazine of Water and Future, Korea Water Resour. Assoc., 42(5), 18-22(2009).
  11. Choi, J. Y., Lee, B. G., Han, D. H., Hwang, D. H., Jang, S. H. and Kang, Y. J., "Final Report for Organic Materials Assessment and Management Policy of Public Waters," Service Report from Korea Environment Institute to Ministry of Environment(2008).
  12. Lee, J. K., "A study of sewage reduction for total pollution load management of discharging treatment plant," Planning Research Report 2012-12 of Daejeon Development Institute (2012).
  13. Dongbu Engineering, Daejeon Environmental Technology Development Center, "A Research of Development of Ecological River in Urban Area; Deajeon," Korea Institute of Civil Engineering and Building Technology(2003).
  14. Dongbu Engineering, "Basic Plan for Gap-cheon River Management," Service Report from Dongbu Engineering to Deajeon Metropolitan City, The Ministry of Construction and Transportation(1993).
  15. Ministry of Environment, Home Page, www.me.go.kr(2015).
  16. Seo, D., Yun, J. W. and Lee, J. W., "Comparative analysis of QUAL2E, QUAL2K and CAP steady state water quality modeling results on downstream areas of the Geum River, Korea," J. Korean Soc. Water and Wastewater, 22(1), 121-129(2008).
  17. Seo, D. I., Seo, M. J., Koo, M. S. and Woo, J. K., "Serial use of hydrodynamic and water quality model of the Geum River using EFDC-Hydro and WASP7.2," J. Korean Soc. Water and Wastewater, 23(1), 15-22(2009).
  18. Seo, D., Lee, E. H. and Reckhow, K. "Development of the CAP water quality model and its application to the Geum River, Korea," Environ. Eng. Res., 16(3), 121-129(2011). https://doi.org/10.4491/eer.2011.16.3.121
  19. Kim, S. M., Kim, K. H., Hong, I. P. and Seo, D., "Estimation of Required Low Flow of the Geum River for Water Quality Management During Dry Seasons," J. Korean Soc. Environ. Eng., 19(11), 1347-1360(1997).
  20. Geum River Environment Research Center, "1st Year Annual Report of Analysis of Temporal and Spatial Water Quality Dynamics in the Geum River," Environment Basic Survey Project of Commission of the Geum River Water Quality Management(2005).
  21. Lee, H. S., Hur, J., Jeong, S. A., Hwang, S. J. and Shin, J. K., "Spatial Characterization of Water Pollution in the Urban Stream Watershed (Gap-Cheon River)," J. Korean Soc. Water Qual., 22(5), 943-951(2006).
  22. Nam, T. K., "Trend Analysis of Water Qualities of the Daejeon 3 Major Streams Based on Mann-Kendall Test," Master Thesis of Hanbat National University Graduate School of Industry(2013).
  23. Lim, B. H., Mun, K. W., Lee, J. Y. and Lee, J. G., "Integrated Management Plan for Three Major Rivers in Daejeon with Themes," Daejeon Development Institute(2014).
  24. Dongbu Engineering, Haneal Engineering Group, "A Basic Design of Restoration of Daejeon-cheon and Youdeung-cheon Ecological Restoration," Service report from Dongbu Engineering to Deajeon Metropolitan city(2006).
  25. Zhou, J. J. and Lim, B. S., "Characteristics of Water Quality Change of Urban River according to Installation of Interceptors and Wastewater Treatment Plant," J. Korean Soc. Environ. Eng., 36(12), 813-820(2014). https://doi.org/10.4491/KSEE.2014.36.12.813
  26. Lee, J. H. and Park, E. K., "Rivers Restoration Strategies of Daejeon Metropolitan City," J. Korea Water Resour. Assoc., 177, 41(4), 49-59(2008). https://doi.org/10.3741/JKWRA.2008.41.1.049

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