Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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Pollutants Classification based on Trend Analysis and Assessment of Water Pollutants Achievement in Subbasins of Han River Basin

한강수계 중권역별 오염물질 추세분석 및 달성도 평가를 통한 우선관리물질 선정

  • Kim, Kyeung (Rural Systems Engineering, Seoul National University) ;
  • Song, Jung-Hun (Department of Agricultural and Biological Engineering & Tropical Research and Education Center, University of Florida) ;
  • Lee, Do Gil (Department of Agricultural and Biological Engineering, University of Florida) ;
  • Hwang, Ha-sun (Water Environmental Research Department, National Institute of Environmental Research) ;
  • Kang, Moon Seong (Department of Rural Systems Engineering, Research Institute of Agriculture and Life Sciences, Institute of Green Bio Science and Technology, Seoul National University)
  • Received : 2019.02.28
  • Accepted : 2019.05.14
  • Published : 2019.05.31
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Abstract

The objectives of this study were to analyze trends of water pollutants and to evaluate the achievement of water quality standards by subbasins in the Han River. The trends of 40 water pollutants at 232 water quality measurement points were analyzed. Chemical oxygen demand (COD), Total organic carbon (TOC), Total coliforms (TC), et cetera were found to be worsening trend. For evaluation of achievement, we evaluated water quality arithmetic mean with river environment standards and human health standards at representative points of the subbasin. Biochemical oxygen demand (BOD), TOC, Total phosphorus (T-P), Fecal coliforms (FC), TC exceeded water quality standards, and water quality of human health standards was all satisfied. So, we prioritized pollutants. If pollutants exceed water quality standards or were worse, they were classified first pollutants. Although BOD and T-P are first pollutants because of water quality standards excess, they are continuously improved. Also, it is better to maintain current status because water quality management system of BOD and T-P is well prepared. Meanwhile, TOC, TC, and FC exceed water quality standards. Furthermore, they were worse gradually, but there is a lack of management systems such as water quality standards of the effluence facilities. Therefore, it is necessary to supplement the system. The results of this study can be used as primary data for the establishment of water quality standards and selection of management pollutants.

Keywords

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Fig. 1 Study area and water quality monitoring point

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Fig. 2 Flow chart of trend analysis

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Fig. 3 Flow chart of assessment of water quality standards satisfaction

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Fig. 4 Result of trend analysis by subbasin

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Fig. 5 Result of evaluation of achievement by subbasin

Table 1 Water quality parameters and measurement cycle of water quality monitoring network

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Table 2 Reviewed water quality parameters (Presidential Decree No.28720, 27. Mar, 2018)

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Table 3 Classification of pollutants

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Table 4 Trend analysis result of all pollutants (2006∼2015)

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Table 5 Status of water quality standard of pollutants

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Table 6 Assessment of water quality standard satisfaction at subbasin representative point

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Table 7 Classification result of all pollutants by trend analysis and water quality standard satisfaction

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