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Assessment of Pollutant Loads for Water Enhancement in the Jeongeupcheon of Dongjin River

동진강 정읍천 유역 오염부하량 평가

  • 이경보 (호남농업연구소 식물환경과) ;
  • 김종천 (호남농업연구소 식물환경과) ;
  • 박지혜 (호남농업연구소 식물환경과) ;
  • 이덕배 (호남농업연구소 식물환경과) ;
  • 김종구 (호남농업연구소 식물환경과)
  • Published : 2004.03.31

Abstract

The influence of pollutant loads on the water quality in Jeongeupcheon of Dongjin river was evaluated from Jan. 2002 to Dec. 2003 for two years. The range of pH in water was $6.87{\sim}7.53$. The EC level in upstream ranged from 83 to $95\;{\mu}s/cm$ with the highest value in autumn. The BOD level in upstream rang ed from 0.61 to 1.27 mg/L, which would be I grade according to water quality criteria by Ministry of Environment, but that in downstream was III grade. The average T-N level in midstream ranged from 6.10 to 10.84 mg/L which was the highest values throughout the stretch of the river. The average T-P levels ranged from. 0.41 to 0.98 mg/L Jeongeupcheon was suitable for the agricultural usage based upon one year analysis of river water quality. The effluent loads of BOD was high in midstream (J4) with 553 kg/day. The major sources of T-N loads were livestock, population, land use, and industry in order. The effluent loads of T-N was high in J4 by population and industry while that of T-N was high in J5 and J6 by livestock and land use. The delivered loads of T-N was high in downstream The delivered loads of T-P was low as compared with those of BOD and T-N. The delivery ratio of T-N ranged from 6 to 38%.

하천 수질관리 대안을 제시하고자 동진강에 영향을 가장 크게 미치는 정읍천을 대상으로 2002년 1월부터 2003년 12월까지 점 및 비점 오염원으로부터 수질오염물질의 부하량, 유출경로 등을 평가하였다. 계절별 수질 변화는 pH범위가 $6.87{\sim}7.53$으로 봄의 pH 범위가 컸으며, EC 농도는 정읍천 중류가 높았으며, 상류유역은 $83{\sim}95\;{\mu}s/cm$ 범위를 나타냈고, 계절별로 가을에 $517\;{\mu}/cm$로 가장 높았다. BOD의 농도는 상류유역에서 $0.61{\sim}1.27\;mg/L$로 I 급수 수질을 나타내었으나, 중류와 하류에서는 III등급 수준이었다. T-N의 농도는 정읍천 중류 유역이 $6.10{\sim}10.84\;mg/L$로 가장 높았고, T-P의 농도는 타 오염물질에 비해 농도의 편차가 컸으며, 특히 중류에서 T-P의 농도가 $0.41{\sim}0.98\;mg/L$로 높았다. BOD의 배출부하량은 J4 유역에서 553 kg/day로 가장 많았고 T-N 발생부하량은 가축, 인구, 토지이용, 산업의 순으로 켰으며, T-N 배출부하량은 인구 및 산업에 의한 것은 J4 유역, 가축과 토지이용에 의한 부하량은 J5, J6유역에서 높았다. T-N의 유달부하량은 하류 유역에서 높았으며, T-P의 유달 부하량은 BOD, T-N에 비하여 유달부하량이 낮았고 유달율은 $6{\sim}38%$ 범위를 나타냈다.

Keywords

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Cited by

  1. Monitoring of Hydrological and Water Quality in Dongjin-River Hengjeong Bridge Watershed for Agricultural Watershed Non-Point Pollutant Sources Management vol.54, pp.4, 2012, https://doi.org/10.5389/KSAE.2012.54.4.055