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A Study on Grade Classification for Improvement of Water Quality and Water Quality Characteristics in the Han River Watershed Tributaries

  • Journal of Environmental Impact Assessment
  • Abbr : J EIA
  • 2019, 28(3), pp.215-230
  • Publisher : Korean Society Of Environmental Impact Assessment
  • Research Area : Engineering > Environmental Engineering
  • Published : June 30, 2019

Yong-Chul Cho 1 Min-Ji PARK 1 신경용 1 Hyeon-Mi Choi 1 Sanghun Kim 2 Soonju Yu 1

1국립환경과학원 한강물환경연구소
2국립환경과학원

Accredited

ABSTRACT

The objective of this research is to evaluate the water quality characteristics using the statistical analysis of major tributaries in the Han River and to provide water quality improvement plan by selecting tributaries that should be preferentially managed by river grade classification method. The major 15 tributaries in Han River watershed were monitored for discharge and water quality during January-December 2017. As a result of the correlation analysis, the river discharge has been not correlation with other water quality constituents (p>0.05) but COD and TOC were significantly correlated (r=0.957, p<0.01). The main cause of water quality fluctuation was organic pollutants and nutrients in the principal component analysis (PCA) method. The BOD, COD, TOC, TN, and TP were found to be significantly different (p<0.05) by seasonal in result of one-way ANOVA analysis. Result of river grade classification by quantitative indicators the tributaries requiring improvement of water quality were Gulpocheon, Anyangcheon, Wangsukcheon, and Tancheon which affected by wastewater treatment plant. In this research, we determined tributaries that need to improve the water quality of Han River watershed and it can be used as an important data for efficient water quality management.

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