Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Investigation on the Factors Affecting Urban Stormwater Management Performance of Bioretention Systems

식생체류지의 도시 강우유출수 처리효율 영향인자 조사 연구

  • Geronimo, Franz Kevin F. (Department of Civil and Environmental Engineering, Kongju National University) ;
  • Maniquiz-Redillas, Marla C. (Department of Civil and Environmental Engineering, Kongju National University) ;
  • Hong, Jungsun (Department of Civil and Environmental Engineering, Kongju National University) ;
  • Kim, Lee-Hyung (Department of Civil and Environmental Engineering, Kongju National University)
  • ;
  • ;
  • 홍정선 (공주대학교 건설환경공학과) ;
  • 김이형 (공주대학교 건설환경공학과)
  • Received : 2016.11.01
  • Accepted : 2016.12.21
  • Published : 2017.01.30
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Abstract

Bioretention systems, an advance low impact development and green infrastructure approach were currently utilized in different parts of the world because it promotes biodiversity thereby mimicking and preserving the pre-developed state of an area. This study investigated and compared the capability of four bioretention systems to identify factors affecting the hydraulic capabilities and pollutant removal efficiencies of each system. The two bioretention type A referred as Type A-C and Type A-FC were planted with perennials such as Chrysanthemum and Fan columbine, respectively. On the other hand, the two type B bioretention systems referred as Type B-A and Type B-JM were planted with shrub plant species such as Azalea and Japanese Meadowsweet, respectively. Based on the results, TV, infiltration mechanism, filter media depth and plant species were identified as the factors affecting the difference in flow attenuation, retained volume and pollutant removal efficiency of Type A-C, Type A-FC, Type B-A and Type B-JM bioretention systems. The design of bioretention Type B-A and Type B-JM were advantageous considering greater volume retention, groundwater recharge, longer HRT and peak flow attenuation and greater pollutant removal efficiency. On the other hand, the design of bioretention Type A-C and Type A-FC was more appropriate for design considering reduced groundwater contamination.

식생체류지는 도시 강우유출수 관리를 위한 저영향개발 및 그린인프라 기술이며, 개발이전의 상태를 최대한 유지하는 강우유출수 관리기술로 자연을 모방하면서 생태계의 다양성을 향상시키는 기술이다. 본 연구는 식생체류지의 물순환 능력과 비점오염물질의 저감효율에 영향을 끼치는 인자를 도출하기 위하여 4개의 식생체류지 시스템에 대하여 연구를 수행하였다. 2개의 식생체류지, 즉 Type A-C와 Type A-FC에는 국화와 매발톱꽃이 식재되었으며, Type B-A와 Type B-JM식생체류지에는 진달래 및 조팝나무와 같은 관목식물이 식재되었다. 연구결과 식생체류지의 유출저감, 저류량 및 오염물질 저감에 영향을 끼치는 인자로는 TV, 침투기작, 여과재의 두께와 식생 종류로 나타났다. Type B-A와 Type B-JM식생체류지 설계시에는 유출저감, 지하수 충진, 긴 체류시간과 첨두유출량 저감과 비점오염물질 저감을 고려하여 설계가 필요한 것으로 나타났다. 반면에 Type A-C와 Type A-FC 식생체류지 설계시에는 지하수 오염 저감을 중요하게 고려하여야 하는 것으로 나타났다.

Keywords

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