대한환경공학회지 (Journal of Korean Society of Environmental Engineers)

  • 제36권5호
  • /
  • Pages.333-341
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  • 2014
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  • 1225-5025(pISSN)
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  • 2383-7810(eISSN)
대한환경공학회 (Korean Society of Environmental Engineers)
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양도 초등학교 빗물이용시설의 수질 및 경제성 평가

Evaluation of Stored Rainwater Quality and Economic Efficiency at Yangdo Elementary Rainwater Harvesting System

  • 김기영 (서울대학교 건설환경공학부) ;
  • 박현주 (서울대학교 공학연구소) ;
  • 김충일 (서울대학교 건설환경종합연구소) ;
  • 한무영 (서울대학교 건설환경공학부)
  • Kim, Kiyoung (Department of civil and Environmental Engineering, Seoul National University) ;
  • Park, Hyunju (Engineering Institute, Seoul National University) ;
  • Kim, Tschungil (Integrated Research Institute of Construction and Environmental Engineering, Seoul National University) ;
  • Han, Mooyoung (Department of civil and Environmental Engineering, Seoul National University)
  • 투고 : 2012.10.22
  • 심사 : 2014.05.05
  • 발행 : 2014.05.31
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초록

본 연구에서는 양도 초등학교에 강우량과 집수면적, LPCD를 고려하여 빗물이용시설을 설치하였다. 빗물이용시설은 학교 내 외의 상수를 대체하고자 하는 목적으로 설계되었다. 용량은 2톤으로 학교 용수의 34.4%를 대체할 수 있었으며 1년의 2/3정도인 237일 동안 빗물을 사용할 수 있었다. 총 세 차례의 수질검사 결과 일반 세균을 제외한 나머지는 먹는 물 수질에 적합하였다. 또한 동시간에 조사한 주변 지하수는 일반세균을 비롯한 질산성질소, 증발잔류물이 기준치를 초과하였다. 빗물의 수질 및 수량을 고려한 결과, 양도초등학교의 경우 빗물을 대체용수로서 사용하기에 적합하였다. 빗물시설에 대한 경제성 분석 결과, 내구연수 10년인 빗물이용시설은 B/C (Benefit-Cost Ratio) 비율이 1.70으로 경제성 편익이 비용보다 큰 걸로 나타났다. 특히 본 연구에서 고려한 사회적인 요인 외에도 금액으로 환산하기 힘든 홍수방지, 가뭄대비, 교육 효과가 있어 사회적 편익이 더욱 증가할 것으로 예상된다.

To supply substitution water, $2m^3$ of capacity of rainwater harvesting system is designed calculating rainfall, catchment area and LPCD and has a effects to 34.4% of substitution water supply and 237 days of service day. Rainwater of drinking water quality was judged to be suitable except for bacteria problem, however, groundwater is exceeded in nitrate nitrogen, the evaporation residue and also bacteria, which means that the rainwater is suitable for use as water supply. In addition, to consider cost-benefit ratio, economic analysis conducted. The result is that B/C ratio of RWHS (10 years) is 1.70. It means total benefit is bigger than cost. Except to social factor in this study, there are a variety of benefit such as flood or drought prevention, educational effects inspiring water conservation awareness.

키워드

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피인용 문헌

  1. Water Quality Monitoring in Small/Medium Sized Reservoirs vol.37, pp.11, 2015, https://doi.org/10.4491/KSEE.2015.37.11.631