한국습지학회지 (Journal of Wetlands Research)

  • 제17권4호
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  • Pages.380-390
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  • 2015
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  • 1229-6031(pISSN)
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  • 2384-0056(eISSN)
한국습지학회 (Korean Wetlands Society)
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낙동강 지류·지천의 유량·수질 특성 및 하천관리를 위한 등급화 방안 연구

Flow Rate·Water Quality Characteristics of Tributaries and a Grouping Method for Tributary Management in Nakdong River

  • 나승민 (국립환경과학원, 낙동강물환경연구소) ;
  • 임태효 (국립환경과학원, 낙동강물환경연구소) ;
  • 이재운 (국립환경과학원, 낙동강물환경연구소) ;
  • 권헌각 (국립환경과학원, 낙동강물환경연구소) ;
  • 천세억 (국립환경과학원, 낙동강물환경연구소)
  • Na, Seungmin (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Lim, Tae Hyen (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Lee, Jae Yun (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Kwon, Heongak (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Cheon, Se Uk (Nakdong River Environment Research Center, National Institute of Environmental Research)
  • 투고 : 2015.08.24
  • 심사 : 2015.10.19
  • 발행 : 2015.11.30
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초록

본 연구에서는 낙동강 수계에 속한 지류 지천의 효율적인 유역선정 및 수질 개선방안을 모색하기 위해 38개 지류 지천을 대상으로 수질 및 유량 모니터링을 실시하였다. 2013~2014년 동안 실시한 수질 유량자료를 바탕으로, 수질현황 결과와 각 항목 사이 상관관계를 분석하였다. 더불어, 상관계수가 높고 총량 목표수질지표 항목인 생물화학적산소요구량($BOD_5$), 총인(TP) 지표를 이용하여 $BOD_5$농도/유량(Q), TP농도/유량 교차기준으로 지류 지천 등급화 방안을 실시하였다. 그 결과, $BOD_5$, $COD_{Mn}$, TP, TOC 등의 유기오염물질농도는 낙동왜관 및 낙동고령 중권역에 위치한 구미천, 경호천, 진전천, 기세곡천, 용하천, 용호천 등에서 하천환경기준 III 및 IV 등급 (5~8 mg/L 이하) 수준으로 높게 관찰되었다. Pearson 상관계수를 통한 수질항목 (12가지)간 상관관계 조사 결과 역시, $BOD_5$, $COD_{Mn}$, TP, TOC 등의 상관관계지수가 다른 수질항목들에 비하여 0.8 (p<0.01) 이상으로 높았다. 유량과 수질 ($BOD_5$, TP)항목을 활용하여 하천등급화를 실시한 결과, 유량 ($0.1m^3/s$ 이상)과 유기물 농도가 높은 ($BOD_5$ > 3.0 mg/L, TP > 0.1 mg/L) I 그룹의 하천(영산천, 구미천, 기세곡천, 용하천, 용호천, 미전천)이 우선수질개선 및 중점 관리가 필요한 것으로 나타났다.

In this study, the major 38 tributaries in Nakdong River were monitored for flow rate and water quality in order to understand the characteristics of the watershed and to find improvement plan. The flow rate and water quality for each target tributary were evaluated based on the monitoring data in 2013~2014 using a statistical package SPSS-22.0. In addition, the tributary grouping method was conducted using a $BOD_5$ concentration/flowrate and TP concentration/flowrate monitoring data. The average values of $BOD_5$, $COD_{Mn}$, TP and TOC concentrations in Gumicheon, Gyeonghocheon, Jincheoncheon, Gisegokcheon, Yonghacheon and Yonghocheon located at Nakdong Waegwan and Nakdong Goryung watershed were high and in the grade of III or IV (5~8 mg/L). The Pearson correlation coefficients of TOC with $BOD_5$, $COD_{Mn}$, and TP were greater (r=0.8, p<0.01) than those of the other water quality parameters (12 species). The tributaries with high values of water quality parameters ($BOD_5$ > 3.0 mg/L, TP > 0.1 mg/L) and flowrate (Q > $0.1m^3/sec$) were selected for improving water quality according to the stream grouping method. Five tributaries (Gumicheon, Gisegokcheon, Yonghacheon, Yeongsancheon, Mijeoncheon and Yonghocheon) were classified as Group I, which require polices and plans for water quality improvement.

키워드

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피인용 문헌

  1. A Study on Seasonal Pollutant Distribution Characteristics of Contaminated Tributaries in Nakdong River Basin vol.18, pp.3, 2016, https://doi.org/10.17663/JWR.2016.18.3.301
  2. Analysis of Specific Contaminated Status and Pollutant Loads Contribution Rate of the Tributaries in Gumho and Nam River Basin vol.18, pp.4, 2016, https://doi.org/10.17663/JWR.2016.18.4.363