주택정비사업에서의 빗물관리 적용 타당성 분석

Abstract

This study analyzed the feasibility to apply the stormwater management linked with the natural soil and the green space in the housing redevelopment and reconstruction of Seoul, for the purpose of the recovery of the water cycle and the prevention of severe damages caused by torrential rainstorms, especially in concrete-covered urban areas. The stormwater management in the existing redevelopment and reconstruction projects has been the centralized exclusion method, but recently Seoul is introducing the integrated stormwater runoff control method. Therefore, in this study, a survey of the civic consciousness for the stormwater management was conducted and the effect of the stormwater management on environmental change reduction and flooding prevention were investigated. Also, the economic analysis for rainwater utilization facilities and stormwater infiltration facilities was performed. The result showed that the rainwater utilization with less than 60 days in rainwater utilization facilities was 48.6%, utilization efficiency was not high, and 38%of the facilities was not operated. However, we found that stormwater infiltration facilities were effective in flood disaster prevention. In addition, the result of the economic analysis showed that stormwater filtration facilities were operated at a lower cost than rainwater utilization facilities. Hence, the findings of this study suggest that the stormwater management in order to recover the water cycle should be directed toward expanding stormwater infiltration facilities in the housing redevelopment and reconstruction projects.