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Evaluation of Discharge-Water Quality Characteristics and River Grade Classification of Jinwi River Unit Basin

  • Journal of Environmental Impact Assessment
  • Abbr : J EIA
  • 2018, 27(6), pp.704-716
  • Publisher : Korean Society Of Environmental Impact Assessment
  • Research Area : Engineering > Environmental Engineering

Yong-Chul Cho 1,  최진우 2,  노창완 1,  Phil-Sang Kwon 1,  Sanghun Kim 2,  Soonju Yu 1

1국립환경과학원 한강물환경연구소
2국립환경과학원

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ABSTRACT

The aim of this study is to examine the characteristics analysis of the discharge and water quality based on TPLMS (Total Pollution Load Management System) in the Jinwi River unit basin, and to propose a management plan by selecting the point that needs improvement of water quality in order to achieve the target water quality. We evaluated the discharge and water quality characteristics, statistical analysis, daily delivery load and daily delivery density, grade classification, for 14 total pollution load site’s from 2014 to 2016 year in Jinwi river unit basin. The average discharge of Jinwi river unit basin is 22.411 m3/s and discharge of Hwangguji River is 32.8% and the water quality characteristics along the tributary river were clarified spatially. As the result, it was analyzed that Seongeun River is an indirect indicator of organic pollutants, Gwanri River is a seasonal factor, Osan River and Hwangguji River both affect water quality. Estimation of delivered pollutant loads at the HG-3 site was 6,470.4 BOD kg/day, 6,846.7 TN kg/day and delivered pollutant loads density increased to 220.9 BOD kg/day/km2, 22.4 TP kg/day/km2 at the HG-4 site. This result demonstrates that the total pollution load site needed to improve water quality of the Jinwi River unit basin was HG-3 site.

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