title: A pilot study to evaluate runoff quantity from green roofs.
abstract: The use of green roofs is gaining increased recognition in many countries as a solution that can be used to improve environmental quality and reduce runoff quantity. To achieve these goals, pilot-scale green roof assemblies have been constructed and operated in an urban setting. From a stormwater management perspective, green roofs are 42.8-60.8% effective in reducing runoff for 200 mm soil depth and 13.8-34.4% effective in reducing runoff for 150 mm soil depth. By using Spearman rank correlation analysis, high rainfall intensity was shown to have a negative relationship with delayed occurrence time, demonstrating that the soil media in green roofs do not efficiently retain rainwater. Increasing the number of antecedent dry days can help to improve water retention capacity and delay occurrence time. From the viewpoint of runoff water quality, green roofs are regarded as the best management practice by filtration and adsorption through growth media (soil).
authors: KIST(Korea Institute of Science and Technology)-Natural Products Research Center, Gangnueng, 210-340, South Korea. Electronic address: juyounglee@snu.ac.kr.
authors: Ju Young
authors: JY
authors: Lee
authors: LIFTRC(LED-IT Fusion Technology Research Center), Daegu, South Korea. Electronic address: pepern@liftrc.re.kr.
authors: Min Jung
authors: MJ
authors: Lee
authors: Department of Civil and Environmental Engineering, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul, 151-744, South Korea. Electronic address: myhan@snu.ac.kr.
authors: Mooyoung
authors: M
authors: Han
mesh_terms: D004784:Environmental Monitoring / Q000379:methods*; D010865:Pilot Projects; D011891:Rain; D056910:Republic of Korea; D012987:Soil / Q000737:chemistry*; D014872:Water Movements; D060753:Water Quality
chemical_list: D012987:Soil
keywords: Best management practice (BMP); Environmental quality; Green roofs; Reducing runoff quantity; Spearman rank correlation