Abstract
Abstract. Cities are experiencing increased pressure on social, economic, and environmental sectors due to the rapid urbanisation and increasing risk owing to climate change affecting the urban environment. Solutions such as green roofs are often discussed in the context of smart and sustainable cities as they present a multi-functional and solution-oriented approach to address these challenges. Green roofs become extremely relevant in the context of highly urbanised and compact cities where impervious surfaces are abundant. Therefore, in this paper, we analyse the potential of green roofs at a city scale with the help of parameters such as area and slope of the roof and structure of the building. We also identify the priority zones based on environmental and socio-economic parameters. The study is carried out in the city of Liege, Belgium. The results suggest that around 20% (350 hectares) of the total buildings in the city have the potential for developing green roofs. Moreover, the potential of green roofs is quite significant in terms of roof area in the priority zone. Due to significant socio-economic deprivation in high priority zones, implementation of green roofs might not be affordable. Buildings with larger roof sizes are mostly owned by companies or commercial establishments, thus, making larger roofs more relevant for retrofitting green roof. Thus, our approach can act as a preliminary decision-making tool for urban planners to analyse the potential of green roofs and prioritize them in deprived areas.
Highlights
Unprecedented urbanisation along with the increasing climate change has led to increased pressure on social, economic and environmental sectors impacting the human life and the natural environment in the cities (Jha et al, 2012; Stephenne et al, 2016)
In our analysis of flat roof detection, we identify the percentage of area that is flat in each of the building roof
Urban Green Infrastructure (UGI) such as green roofs are gaining popularity owing to their multiple benefits and their ability to provide these benefits in compact cities
Summary
Unprecedented urbanisation along with the increasing climate change has led to increased pressure on social, economic and environmental sectors impacting the human life and the natural environment in the cities (Jha et al, 2012; Stephenne et al, 2016). Urban and environmental issues induced by the rapid growth of population and their consumption-driven lifestyles prove to be a challenge for urban planners (Dizdaroglu et al, 2012; Wu, et al, 2018). In such a situation, urban planners are redirected towards the frontier of sustainable cities (Sodiq et al, 2019). Smart city concept has been promoted as an instrument to manage various urban and environmental challenges such as environmental pollution, urban heat island, biodiversity loss and socio-economic inequalities (Yigitcanlar et al, 2019). In this paper, we combine the smart and sustainable city approach with a view to addressing the aforementioned urban and environmental problems
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