Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Long-Term Water Quality Trend Analysis with NTrend 1.0 Program in Nakdong River

NTrend 1.0에 의한 낙동강 수질 장기변동 추세분석

  • Yu, Jae Jeong (Nakdong River Water Environmental Research Center, National Institute of Environmenl Research) ;
  • Shin, Suk Ho (Nakdong River Water Environmental Research Center, National Institute of Environmenl Research) ;
  • Yoon, Young Sam (Nakdong River Water Environmental Research Center, National Institute of Environmenl Research) ;
  • Song, Jae Kee (Department of Statistics, Kyungpook National University)
  • 유재정 (국립환경과학원 낙동강물환경연구소) ;
  • 신석호 (국립환경과학원 낙동강물환경연구소) ;
  • 윤영삼 (국립환경과학원 낙동강물환경연구소) ;
  • 송재기 (경북대학교 통계학과)
  • Received : 2010.05.19
  • Accepted : 2010.09.07
  • Published : 2010.11.30
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Abstract

The effect of seasonality on water quality variation is very significant. Generally, it reduce the power of the trend extraction. A parametric time-series model was used for detecting trends in historic constituent concentration data. The effect of seasonality is able to remove from time series decomposition technique. According to such statistic methode, long-term water quality trend analysis system (NTrend 1.0) was developed by Nakdong River Water Environmental Research Center. The trend analysis of BOD variation was conducted with NTrend 1.0 at Goreong and Moolkum site in Nakdong river to show the effect of water quality management action plan. Power test of trend extraction was tried each case of 'deseasonalized and deannulized' data and 'deseasonalized' data. Analysis period was from 1989 to 2006, and it's period was divided again three times, 1989~1993, 1994~1999 and 2000~2006 according to action plan period. The BOD trend was downward in Goreong site during three times and it's trend slope was very steep, and upward in Moolkum during 1989~1993, but it was turned downward during 1994~1999 and 2000~2006. It was revealed that it's very effective to reduce the concentration of BOD by water quality management action plan in that watershed. The result of power test was shown that it is high for trend extraction power in case of 'deseasonalized' data.

Keywords

References

  1. 국립환경과학원(2006). 낙동강의 장기수질변동 추세분석 연구 (1989-2005). NIER NO. 2006-51-833.
  2. 국립환경과학원(2007) 낙동강의 장기수질변동 추세분석 연구 (II). NIER NO. 2007-55-911.
  3. 국립환경과학원(2008). 수질 변동 추세분석 프로그램 매뉴얼.
  4. 김주화, 박석순(2004). 비모수 통계기법을 이용한 낙동강 수계의 수질 장기 경향분석. 수질보전 한국물환경학회지, 20(1). pp. 65-71.
  5. 낙동강호수통제소(2006). http://www.nakdongriver.go.kr/.
  6. 물환경정보시스템(2006). http://watcr.nier.go.kr/.
  7. 환경부(2010). 수질측정망운영 계획.
  8. Simeonov, V., Stratis, J. A., Samara, C ., ZachariadIS, G., Voutsa, D., Anthemidis, A., Sofoniou, M., and Kouimtzis, Th. (2003). Assessment of tne surface water quality in Northern Greece. Water Research. 37. pp. 4119-4124. https://doi.org/10.1016/S0043-1354(03)00398-1
  9. Vecchia, A. V. (2000). Water-quality trend analysis and sampling design for the Souris River, Saskatchewan, North Dakota and Manitoba. Warer-Resources Innvestigation Report 00-4019, U.S. Geological Survey.
  10. Vecchia, A. V. (2003). Water-quality trend analysis and sampling design for streams in North Dakota. 1971-2000. WaterResources Innvestigation Report 05-4094, U.S. Geological Survey.
  11. Vecchia, A. V. (2005). Water-quality trend analysis and sampling desing for streams in the Red River of the north basin, Minnesota, North Dakota, and south Dakota, 1970-2001. Scientific Investigation Report 2005-5224, U.S. Geological Survey.