KIEAE Journal

Korea Institute of Ecological Architecture and Environment (한국생태환경건축학회)
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Analysis of a Change in the Water-Balance after Application of Decentralized Rainwater Management Facilities - Based on the Results of the Hydrologic Modeling using the CAT -

분산식 빗물관리시설 적용에 따른 물수지 변화 분석 연구 - CAT을 이용한 수문모델링 결과를 토대로 -

  • 이태구 (세명대학교 건축공학과) ;
  • 한영해 (에코아르케 생태도시건축연구소)
  • Received : 2011.03.11
  • Accepted : 2011.04.18
  • Published : 2011.04.30
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Abstract

To analyze changes in the water-balance before and after using decentralized rainwater management facilities, this study carried out hydrologic modeling based on data including roof planting, rainwater use, infiltration and detention facilities applied to the sites. The results of the analysis are as follows: First, the total runoff quantity after facility installation was about 24% less than before. In particular, it showed that the surface runoff declined significantly. Second, the analysis of the effects of different decentralized rainwater management facilities revealed that the rooftop planting contributed to about a 3.5 times increase in actual evaporation than before. Third, the analysis of the effect of decentralized management facilities by different rainfall events showed that it turned to have about a 30% decreasing effect after facility installation for a monthly rainfall over 500mm or so and about 50% declining effect for a monthly rainfall about 200mm. As discussed above, the study confirmed that it is important to implement decentralized rainwater management facilities to improve inevitable changes in water-balance arising from development as it would be a significant alternative for sustainable urban development.

Keywords

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