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Developing a framework for building-level analysis of green facade potentials on mitigating urban heat island, using BIM and GIS integration

Moradi Kelardeh, Marjan (2021) Developing a framework for building-level analysis of green facade potentials on mitigating urban heat island, using BIM and GIS integration.

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Abstract:Following the rapid urbanization growth, serious environmental challenges are being posed to modern societies. Urban Heat Island (UHI) is one of the most critical global challenges caused by rapid urbanization affecting people. Therefore, improving the resilience of the cities against UHI is a critical concern to consider in urban planning. In this regard, urban green infrastructures play a crucial role in limiting heat problems in the urban context. Vertical surfaces in cities have a great potential to increase greeneries in cities and contribute to mitigating UHIs regarding scarce spaces in cities. In recent years, the advent of Building Information Modelling (BIM), which provides a semantically rich 3D design of buildings, offers a great potential to investigate the use of green façade to mitigate the UHI effect. Geographic Information System (GIS) in usually used to study UHIs. In this context, there is a gap to integrate BIM data with GIS to evaluate the impact of green façade on UHIs systematically. This study proposes a framework to assess the impact of green facades on mitigating UHIs by integrating BIM and GIS. Data requirements, different approaches to integrating BIM and GIS, and different methods to simulate UHIs were explored through literature review. After collecting the required GIS data, all layers are separately imported to the BIM environment in DWG format, maintaining the shared coordinate with the BIM model. Moreover, the BIM model needs to be simplified since it includes many details that are not required for the simulation. Later, the model can be transferred to the UHI simulation engine. After adding the weather data, running the simulation both with and without greenery represents the cooling effect of green facades. Subsequently, the developed framework was implemented on a case study, a building in Deventer, The Netherlands, for 24 hours in a heatwave. Comparing the bare building and the building with a green façade shows a significant decrease in temperature. Finally, the evaluation of the framework was performed through a workshop with six experts from Witteveen en Bos, a consulting engineering company in The Netherlands, to assess the usability of the framework. From the workshop, it was concluded that the proposed framework is able to fulfil the needs of planners, architects and decision-makers in building-scale and city-scale toward a resilient, sustainable city using urban green infrastructure. However, the complexity of the framework may prevent it from being used in daily practices.
Item Type:Essay (Master)
Faculty:ITC: Faculty of Geo-information Science and Earth Observation
Programme:Geoinformation Science and Earth Observation MSc (75014)
Link to this item:https://purl.utwente.nl/essays/88789
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