Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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A Study on the Effect of Water Quality Improvement of a Storm Sewage by Detention Pond

저류지에 의한 우수의 수질개선 효과 연구

  • Lee, Jong-Tae (Division of Civil & Environment Eng., Kyonggi Univ.) ;
  • Song, Chi-Heung (Division of Geueral Environment, Kyung-ho Eng. Co.) ;
  • Gang, Tae-Ho (Division of Water Resources Kun Il Eng. Co.)
  • 이종태 (경기대학교 토목환경공학부 토목공학과) ;
  • 송치흥 (경호기술단 종합환경사업부) ;
  • 강태호 (건일엔지니어링 수자원부)
  • Published : 2000.06.01
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Abstract

The effect of water quality improvement of combined sewage by detention pond has been studied. It is convinced that the pollutant load and peak flow through the combined sewer by first rainfall and runoff can be decreased by detention pond sited at the outlet of small basin. Hydraulic modeling of detention panel was performed for two cases of sedimentation pond and gravel contact pond. It has been recognized that it is more efficient to reduce the pollutant of combined sewage when the combined sewage is released alter a fixed detention time in the detention pond than it is released continuously without detention time. The gravel contact detention pond shows higher pollutant removal rate than the sedimentation detention pond in all pollutants. When it comes to gravel contact detention pond, the gravel pond filled with crushed gravel has a higher pollutant removal rate than that filled with river gravel.

본 연구에서는 저류지에 의한 우수의 수질개선 효과를 모형실험에 의하여 분석하였다. 본 연구를 통하여 배수구역 출구에 저류지를 설치함으로써 합류식 관거를 통한 하수 및 강우 초기 유출수의 첨두유량과 오염도를 크게 경감시킬 수 있음을 확인하였다. 저류조 모형실험은 자연침강 저류조와 자갈접촉 저류조에 대하여 각각 실시하였다. 자연침강 저류조실험에서는 지속적으로 우수한 방류하는 경우보다는 일정시간 저류지내에 정체 후 방류하는 경우가 동일한 지체시간의 조건하에서 더 높은 오염물질 제거율을 보였다. 또한, 자갈을 채운 저류조에 대한 실험을 실시하였으며, 자연침강 저류조에 비해 전반적으로 각 오염성분에 대해 높은 제거율을 보였다. 한편, 채움재료의 표면이 상대적으로 거친 쇄석의 경우가 자갈보다 높은 제거율을 보였다.

Keywords

References

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