نوع مقاله : مقاله پژوهشی
نویسندگان
1 استادیار، گروه طراحی شهری، دانشکده شهرسازی، دانشگاه تهران، تهران، ایران
2 گروه طراحی شهری، دانشکده شهرسازی، دانشگاه تهران، تهران، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
With the intensification of climate change and the growing thermal stress, analyzing the role of urban morphology in shaping microclimatic conditions and outdoor thermal comfort has become a fundamental challenge of urban planning and design. The aim of research is to elucidate the active and dynamic role of urban morphological characteristics in generating microclimatic patterns and to examine the causal and simultaneous relationships between three-dimensional morphological indices, microclimatic variables, and users’ thermal comfort at the neighborhood scale. The study adopts an interdisciplinary approach within a hierarchical conceptual–analytical framework. To this end, numerical microclimate simulations using ENVI-met software were combined with quantitative spatial analyses. Two urban fabrics with distinct morphologies in District 22 of Tehran (Dehkadeh Olympic and Zibadasht), which exhibit significant differences in geometric configuration, building density, and vegetation cover, were selected as case studies. The findings indicate that urban morphology plays a decisive role in shaping microclimatic conditions and users’ thermal experience through the simultaneous control of solar radiation, natural ventilation, and heat and moisture exchange. The low-density, low-rise fabric of Dehkadeh Olympic, due to a higher sky view factor, spatial continuity, and the presence of vegetation, provides a more uniform temperature distribution, more stable ventilation, and a balanced humidity regime. In contrast, the dense, high-rise fabric of Zibadasht, despite localized shading, is prone to thermal heterogeneity and the accumulation of heat and moisture due to airflow obstruction and spatial enclosure. The results emphasize that thermal comfort in urban open spaces is the outcome of a multi-level, non-linear causal chain rooted in the spatial and physical logic of the city. This underscores the necessity of establishing a dynamic balance among density, building height, street geometry, and strategic vegetation placement, and highlights microclimatic simulation as an effective tool for supporting urban design decisions in response to thermal stress.
کلیدواژهها [English]
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