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Evaluation of Pollution Level Attributed to Nonpoint Sources in Nakdonggang Basin, Korea

낙동강수계 권역별 비점오염원 오염도 평가

  • Lee, Jaewoon (Nakdonggang Water Environment Research Center, National Institute of Environmental Research) ;
  • Kwon, Heongak (Nakdonggang Water Environment Research Center, National Institute of Environmental Research) ;
  • Choi, Hanyoung (Eulji University)
  • 이재운 (국립환경과학원 낙동강물환경연구소) ;
  • 권헌각 (국립환경과학원 낙동강물환경연구소) ;
  • 최한영 (을지대학교)
  • Received : 2014.07.08
  • Accepted : 2014.10.22
  • Published : 2014.10.31

Abstract

In this study, the nonpoint sources were evaluated by calculating the Nadonggang basin regional water quality and nonpoint source pollution load discharged. And were selected the banks of first administration based on the results and the direction of the next administration. As a results of estimating the water quality about BOD concentration in the mid influence area in the Nakdonggang basin, it was founded that 10 sites for 'Ia' water quality level, 6 sites for 'lb' water quality level, 5 sites for 'II' water quality level, 1 sites for 'I' water quality level. The estimation of COD concentration in the mid influence area, It showed that 9 sites for 'Ib' water quality level, 6 sites for 'II' water quality level, 6 sites for 'III' water quality level, 1 site for 'IV' water quality level. The assessment of water quality made Mid influence area of Gumhogang, Nakdong Goryung, Nakdong Milyang and Namgang selected as the mid influence area of high pollution. And delivery loads of nonpoint sources were calculated for mid influence area in Nakdonggang basin(max delivery load : 17,706.7 kg/day for Gumhogang influence area). As the result of calculating NPS(nonpoint sources) delivery load and water quality at influence area in Nakdonggang basin, Gumhogang influence area was selected as an area for management priority among nonpoint sources.

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Cited by

  1. Trend Analysis of Monthly Water Quality Data in Nakdong River Based on Seasonal Mann-Kendall Test vol.57, pp.6, 2015, https://doi.org/10.5389/KSAE.2015.57.6.153