Parametric modelling for the mitigation of urban heat island effect: a model proposal

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2018
Sakar, Begüm
Morphological characteristics of urban settlements as the outcome of the long-term planning decisions influence microclimatic conditions of our cities and more specifically induces the “Urban Heat Island” (UHI) effect, which generates many undesirable conditions in the living environment. In the very context of global warming that generate intensive UHI in the cities, any change in the thermal balance of the urban environment is associated with the main parameters of urban geometry. This is actually the issue that necessitates more research for the mitigation of heat island intensity by design. In this regard, this study investigates the potentials of computational modelling for analyzing the key morphological components of urban areas, and generating alternative typologies of urban fabric to mitigate UHI intensity. From this standpoint, the current research proposes a parametric model to provide urban design and planning practice with a computational and generative basis in the way of a robust morphological perspective to the mitigation of UHI effect. Since the development of UHI has a strong correlation with the “Sky View Factor” (SVF) value, the methodological framework of this research is formed on the basis of the SVF measurement to estimate UHI intensity via parametric modelling. The alternative form compositions and configurations are generated to simulate different conditions of heat island intensity in accordance with the different values of the basic parametric indicators (i.e. building height, coverage ratio, setback distance), which are utilized as the basic building codes in the spatial planning system in Turkey. The integration of computation and form generation within an algorithmic model, essentially, suggests an effective integration of morphology (analysis) and design to be applied on actual urban context. In this framework, Mustafa Kemal Neighborhood, one of the recent urban transformation site in Ankara is selected as the case study area for the application of the proposed model. Rather than searching for an ideal urban form, the model application focuses on the generation of the best performing form alternatives with regards to the focused issue of UHI effect. From the generative perspective of urban design, the methodological framework with the proposed model is believed to provide a kind of “Decision Support System” (DSS) in planning on the way of the development of an evidence-based urban design approach in practice.

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Citation Formats
B. Sakar, “Parametric modelling for the mitigation of urban heat island effect: a model proposal,” M.S. - Master of Science, Middle East Technical University, 2018.