Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Evaluation on Pollution Load Characteristics and Influence of Tributaries in the Hwangguji Stream

황구지천 유역의 오염부하 특성 및 지류 영향 평가

  • Lim, Su-Jin (Department of Environmental Engineering, Seoul National University of Science and Technology) ;
  • Lim, Byung-Ran (Department of Environmental Engineering, Seoul National University of Science and Technology) ;
  • Lee, Han-Saem (Department of Environmental Engineering, Seoul National University of Science and Technology) ;
  • Kang, Joo-Hyoung (Environmental Preservation Association) ;
  • Ahn, Tae-Ung (Environment Solution Partners) ;
  • Shin, Hyun-Sang (Department of Environmental Engineering, Seoul National University of Science and Technology)
  • 임수진 (서울과학기술대학교 환경공학과) ;
  • 임병란 (서울과학기술대학교 환경공학과) ;
  • 이한샘 (서울과학기술대학교 환경공학과) ;
  • 강주형 (환경보전협회) ;
  • 안태웅 ((주)엔솔파트너스) ;
  • 신현상 (서울과학기술대학교 환경공학과)
  • Received : 2021.05.11
  • Accepted : 2021.06.23
  • Published : 2021.07.30
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Abstract

This study investigated the pollution characteristics of the main pollution zone in the Hwangguji watershed and the influence of the tributary on the main stream. The characteristics of the main pollution zone, including, the water quality index (WQI), stream rating, load duration curve (LDC), delivery load density (DLD), and contribution of the tributary to the mainstream, were evaluated by time-series visual heatmap. The WQI of the mainstream of Hwangguji was lowered to the poor (IV) level from the inflow point of Suwon stream (SW) and the LDC excess rate in the T-P was higher than that of BOD5, especially for the wet season, suggesting that management of non-point source with T-P is preferred. The contribution (%) of the tributaries in the upstream section of Hwangguji watershed were BOD5 14.54%, TOC 15.67%, T-N 5.43%, and T-P 6.97%. In particular, the Suwon sewage treatment plant located in the mainstream showed a high contribution of BOD5 (64.40%) and T-P (53.54%), respectively, due to the high discharge rate (6.019 m3/sec). Meanwhile, Sammi and Gal stream have a large impact on the mainstream with high DLD and poor WQI. Thus, both streams were considered as pollution hot spots. These results provide useful basic data for preparing more effective water quality improvement and management plans in the watershed.

Keywords

Acknowledgement

본 연구는 한강수계관리위원회 환경기초조사사업에 의해 이루어졌습니다.

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