Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Analysis of the Effects of Sewer System on Urban Stream using SWMM based on GIS

GIS 기반의 SWMM 모형을 이용한 하수도시스템 선정에 따른 도시하천 수질개선효과의 정량적 분석

  • Jang, Ju-Hyoung (Department of Environmental Engineering, Pukyong National University) ;
  • Park, Hae-Sik (Busan Metropolitan City Environmental Installations Corporation) ;
  • Park, Chung-Kil (Department of Environmental Engineering, Pukyong National University)
  • Received : 2006.01.09
  • Accepted : 2006.11.09
  • Published : 2006.11.30
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Abstract

Generally CSOs (Combined Sewer Overflows) are regarded as one of the most serious nonpoint pollution source in the urban watershed, Particularly, the water quality of the Oncheon stream is seriously affected by CSOs because the capacity of interception sewer system connected to the Suyoung wastewater treatment plant is too small to intercept most storm water discharges. The objective of this study is to evaluate the effect of nonpoint source on an urban stream with regards to combined sewer system and separate sewer system using GIS (Geographic Information System) and SWMM (Storm Water Management Model), and to provide an insight for the management of urban stream water quality. In order to consider the effect of CSOs on the receiving water quality, the flow divider element in SWMM was applied. The model calibration and verification were performed by the measured data of quantity and quality on the Oncheon stream. The quantity data acquired from the Suyoung wastewater treatment plant were also used for this procedure. In case of separate sewer system, the modeling results showed the increased tendency in streamflow compared with the combined system in dry weather, In addition, the water quality is remarkably improved in rainfall events at the separate condition. The results imply that the construction of separate sewer system should be taken into first consideration to restore the quality and quantity of water in urban streams.

Keywords

Acknowledgement

Supported by : 부산지역환경기술개발센터

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