Assessing the potential of strategic green roof implementation for green infrastructure: Insights from Sumida ward, Tokyo

《Assessing the potential of strategic green roof implementation for green infrastructure: Insights from Sumida ward, Tokyo》

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作者: Jelena Aleksejeva;Gerasimos Voulgaris;Alexandros Gasparatos

来源: URBAN FORESTRY & URBAN GREENING,Vol.74,Issue1,Article 127632

语言: 英文

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作者单位: Graduate Program in Sustainability Science – Global Leadership Initiative (GPSS-GLI), University of Tokyo, Kashiwa, Japan;International University of Health and Welfare, Faculty of Medicine, Narita, Japan;Institute for Future Initiatives (IFI), University of Tokyo, Tokyo, Japan;Institute for the Advanced Studies of Sustainability (UNU-IAS), United Nations University, Tokyo, Japan;Graduate Program in Sustainability Science – Global Leadership Initiative (GPSS-GLI), University of Tokyo, Kashiwa, Japan;International University of Health and Welfare, Faculty of Medicine, Narita, Japan;Institute for Future Initiatives (IFI), University of Tokyo, Tokyo, Japan;Institute for the Advanced Studies of Sustainability (UNU-IAS), United Nations University, Tokyo, Japan;Department of Systems Engineering, Czech University of Life Sciences Prague, Kamýcká 129, 165 21 Prague 6-Suchdol, Czech Republic;Nature Conservation Agency of the Czech Republic, Kaplanova 1931/1, 148 00 Prague 11-Chodov, Czech Republic;School of Geography and Information Engineering, China University of Geosciences, Wuhan, PR China;Department of Geography, Geomatics and Environment, University of Toronto – Mississauga, Mississauga, Canada;Research Area Spatial Information and Modelling, Leibniz Institute of Ecological Urban and Regional Development (IOER), Weberplatz 1, 01217 Dresden, Germany;Technische Universität Dresden, Institute for Cartography, Helmholtzstr. 10, 01069 Dresden, Germany;Laboratorio de Ecología, Unidad de Biotecnología y Prototipos (UBIPRO), Facultad de Estudios Superiores Iztacala Universidad Nacional Autónoma de México. Av. de los Barrios 1, Los Reyes Iztacala, Tlalnepantla, Estado de México 54090, Mexico;Departamento Conservación de la Biodiversidad, El Colegio de la Frontera Sur (ECOSUR), Villahermosa, Tabasco 86280, Mexico;UWA School of Agriculture and Environment, The University of Western Australia, Australia;School of Biological Sciences, The University of Western Australia, Australia;School of Social Sciences, The University of Western Australia, Australia;Person-Environment-Activity Research Laboratory, Department of Civil, Environmental and Geomatic Engineering, University College London, London, UK;Newcastle University, School of Architecture, Planning and Landscape, Newcastle upon Tyne, United Kingdom;The University of Bari Aldo Moro, Bari, Italy

摘要: Urban green spaces, and green infrastructure more generally, provide multiple benefits that can enhance urban livability and sustainability. These range from the mitigation of air pollution and urban heat island (UHI) effect, to multi-dimensional benefits to human wellbeing and biodiversity. However, the expansion of urban green spaces is not always feasible in many cities. In such urban contexts, there have been proposals to utilize rooftops as green roofs in order to gain some of these benefits. This study spatially identifies areas where roofs have the potential to provide different types of benefits associated with urban green spaces if they are retrofitted with green roofs. Through a GIS-based approach we catalogue available roof space in Sumida ward in Tokyo for green roof implementation, and subsequenlty evaluate the potential of each roof patch to offer four types of benefits if retrofitted with a green roof, namely UHI effect mitigation, air pollution mitigation, and benefits to subjective wellbeing and biodiversity. Approximately 25% of the total roof surface in Sumida ward can potentially be used for green roof implementation. Furthermore, about 5.2% and 59% of this area has a respectively high and moderate potential to provide all four benefits if retrofitted with green roofs. This could increase the extent of green spaces by 10% and 120% respectively across the Sumida ward. In this sense, green roofs can become a major element of green infrastructure with ripple positive effects for urban livability and sustainability through the provision of UHI effect and air pollution mitigation, and benefits to subjective wellbeing and biodiversity.