Lee, J. Y. Moon, H. J. Kim, T. I. Kim, H. W. Han, M. Y. 2024-01-20T11:31:13Z 2024-01-20T11:31:13Z 2021-09-05 2013-10 0269-7491 https://pubs.kist.re.kr/handle/201004/127592 Extensive green-roof systems are expected to have a synergetic effect in mitigating urban runoff, decreasing temperature and supplying water to a building. Mitigation of runoff through rainwater retention requires the effective design of a green-roof catchment. This study identified how to improve building runoff mitigation through quantitative analysis of an extensive green-roof system. Quantitative analysis of green-roof runoff characteristics indicated that the extensive green roof has a high water-retaining capacity response to rainfall of less than 20 mm/h. As the rainfall intensity increased, the water-retaining capacity decreased. The catchment efficiency of an extensive green roof ranged from 0.44 to 0.52, indicating reduced runoff comparing with efficiency of 0.9 for a concrete roof. Therefore, extensive green roofs are an effective storm water best-management practice and the proposed parameters can be applied to an algorithm for rainwater-harvesting tank design. (C) 2013 Elsevier Ltd. All rights reserved. English ELSEVIER SCI LTD Quantitative analysis on the urban flood mitigation effect by the extensive green roof system Article 10.1016/j.envpol.2013.06.039 1 ENVIRONMENTAL POLLUTION, v.181, pp.257 - 261 ENVIRONMENTAL POLLUTION 181 257 261 scie scopus 000323807900034 2-s2.0-84880864823 Environmental Sciences Environmental Sciences & Ecology Article RUNOFF PERFORMANCE Extensive green roof Mitigate urban runoff Water retaining capacity Catchment efficient BMP