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A Case Study Stormwater Treatment by Channel-Type Wetland Constructed on the Flood Plane of the Stream

하천 고수부지에 설치한 수로형 인공습지에 의한 강우 유출수 처리에 관한 연구

  • Kim, Piljoo (Water Environment Research Center of ChungNam Institute) ;
  • Han, Euilyung (Dept. of Environmental Engineering, Hanseo University) ;
  • Kim, Youngchul (Dept. of Environmental Engineering, Hanseo University)
  • 김필주 (충남연구원 물환경연구센터) ;
  • 한의령 (한서대학교 환경공학과) ;
  • 김영철 (한서대학교 환경공학과)
  • Received : 2016.12.15
  • Accepted : 2017.02.02
  • Published : 2017.02.28

Abstract

Researches about NPS(Non-point Pollution Source) reduction have been widely carried out in recent years. A pilot channel-type constructed wetland (wet swale) was constructed in Rongyin area to treat stormwater generated from a green house agro-land of 22.7 ha. From 2006 to 2008, monitoring was conducted to evaluate its performance on the removal effect for organic pollutants as well as nutrients. Totally, sampling trips of 17 rainfall events were made and they covered most types of storm events in Korea. The channel-type constructed wetland have average removal efficiencies of 78.3~92.0%, 56.4~66.1%, 28.2~45.5% and 50.6~66.4% for SS, COD, TN and TP, respectively. According to four methods for estimating the removal efficiency, the average efficiencies of TSS, COD, TN and TP are 86.0%, 60.1%, 30.1% and 53.5%, respectively. From 2006 to 2008, annual efficiency improved due to infiltration potential increase. It was found that most of the pollutants removed in this channel type of wetland was particulate solids bound pollutants, which is assumed fact that it lacks of physico-chemical treatment conditions which are commonly observed in the retention type of constructed wetlands.

Keywords

NPS;wetland(wet seale);monitoring;stormwater;removal efficiency

Acknowledgement

Supported by : 환경부

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