Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Application of Rainwater Harvesting System Reliability Model Based on Non-parametric Stochastic Daily Rainfall Generator to Haundae District of Busan

비모수적 추계학적 일 강우 발생기 기반의 빗물이용시설 신뢰도 평가모형의 부산광역시 해운대 신시가지 적용

  • Choi, ChiHyun (Department of Environmental Engineering, PuKyong National University) ;
  • Park, MooJong (Department of Civil Engineering, Hanseo University) ;
  • Baek, ChunWoo (School of Envir. Systems Eng. & Centre for Ecohydrogy, Univ. of Western Australia) ;
  • Kim, SangDan (Department of Environmental Engineering, PuKyong National University)
  • 최치현 (부경대학교 환경공학과) ;
  • 박무종 (한서대학교 토목공학과) ;
  • 백천우 (서호주대학교 환경시스템공학과 & 생태수문학 센터) ;
  • 김상단 (부경대학교 환경공학과)
  • Received : 2011.05.18
  • Accepted : 2011.08.09
  • Published : 2011.09.30
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Abstract

A newly developed rainwater harvesting (RWH) system reliability model is evaluated for roof area of buildings in Haeundae District of Busan. RWH system is used to supply water for toilet flushing, back garden irrigation, and air cooling. This model is portable because it is based on a non-parametric precipitation generation algorithm using a markov chain. Precipitation occurrence is simulated using transition probabilities derived for each day of the year based on the historical probability of wet and dry day state changes. Precipitation amounts are selected from a matrix of historical values within a moving 30 day window that is centered on the target day. Then, the reliability of RWH system is determined for catchment area and tank volume ranges using synthetic precipitation data. As a result, the synthetic rainfall data well reproduced the characteristics of precipitation in Busan. Also the reliabilities of RWH system for each of demands were computed to high values. Furthermore, for study area using the RWH system, reduction efficiencies for rooftop runoff inputs to the sewer system and potable water demand are evaluated for 23%, 53%, respectively.

Keywords

Acknowledgement

Supported by : 한국연구재단

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