Journal of Wetlands Research (한국습지학회지)

Korean Wetlands Society (한국습지학회)
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Evaluation of Rain Garden for Infiltration Capability and Runoff Reduction Efficiency

레인가든의 침투성능 및 유출저감효과 평가

  • Yoo, Chulsang (Department of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Lee, Jinwook (Department of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Cho, Eunsaem (Department of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Zhu, Ju Hua (Department of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Choi, Hanna (R&D Team, Research Institute of Technology, TAEYOUNG E&C)
  • 유철상 (고려대학교 건축사회환경공학부) ;
  • 이진욱 (고려대학교 건축사회환경공학부) ;
  • 조은샘 (고려대학교 건축사회환경공학부) ;
  • 주국화 (고려대학교 건축사회환경공학부) ;
  • 최한나 ((주)태영건설 기술연구소)
  • Received : 2014.12.20
  • Accepted : 2015.02.23
  • Published : 2015.02.28
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Abstract

This study conducted a field experiment to estimate the characteristics of the rain garden installed at the site near Haman, also proposed a one-dimensional model to simulate the infiltration and runoff from the rain garden. This model was used to evaluate the rain garden using the rainfall data after the installation and during the last 10 years. Also, this model was applied to the annual maximum rainfall events to quantify the size of the impervious area that the rain garden can offset the adverse effect. The results are summarized below. (1) Hydraulic conductivity of the rain garden was estimated to be about 0.0188 m/hr by the variable-stage experiment. Also, the simulation experiment using the last 10 years rainfall data over the entire roof area showed that the infiltration amount is about 90.38% out of the total rainfall. (2) Infiltration simulation of the annual maximum rainfall events during last 10 years showed that the rain garden can offset the impervious area with its size about 30 times of the rain garden surface.

본 연구에서는 함안군 군북면 소포리 일원에 있는 ${\bigcirc}{\bigcirc}$부대 이전사업지구에 설치된 레인가든의 특성을 실험을 통해 확인하고, 레인가든의 침투 및 유출을 모의할 수 있는 1차원 모형을 제안하였다. 구축된 모형을 이용하여 설치 후 및 과거 10년간의 강우자료를 이용하여 모의 평가를 수행하였다. 아울러 연최대치 호우사상에 대한 적용 평가를 통해 레인가든이 상쇄시킬 수 있는 불투수면적의 규모를 추정해 보았다. 본 연구의 결과를 정리하면 다음과 같다. (1) 변수위 실험 방법을 적용하여 추정한 레인가든의 투수계수는 0.0188 m/hr인 것으로 나타났다. 아울러 과거 10년간의 강우자료에 대한 모의 실험에서 지붕 전체 면적을 사용하는 경우, 침투량의 비율이 약 90.38%로 나타났다. (2) 지난 10년간의 연최대치 호우사상에 대해 동일한 방법으로 침투모의를 수행한 결과, 본 연구에서 검토한 레인가든은 그 표면적의 30배 정도에 해당하는 불투수면적을 상쇄할 수 있는 침투성능을 가지고 있는 것으로 나타났다.

Keywords

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