Document Type : Research Paper
Authors
1 Master of Architectural Engineering, University of Kurdistan
2 Assistant Professor, Faculty of Art and Architecture, University of Kurdistan
Abstract
Urban areas pose formidable environmental challenges, including harmful atmospheric emissions. This has culminated in elevated temperatures and urban densification. One of the most significant them is Urban Heat Island (UHI), which manifests more prominently in densely populated urban locales. Among the constituent components of urban morphology, water bodies such as rivers and lakes wield noteworthy influence on urban cooling oases. Due to their cooling attributes, water bodies substantially impact UHI through evaporation and heat transfer processes, surpassesing other spaces. In recent years, Tehran has been confronted with pronounced heating predicaments due to population growth. The construction of Chitgar Lake in Tehran provides a remarkable opportunity to explore water bodies' cooling effects and optimize urban structures. In this study, with ENVI-met4.4.5 software, based on the studies, 16 combined models were planned to compare urban scenarios based on urban form and geometry under climatic factors and PET thermal comfort index. From the obtained results, it was found that with the construction of Chitgar Lake, the ambient temperature has decreased and the humidity has increased. The thermal comfort index of PET shows that after the construction of Chitgar Lake, the thermal comfort is lower. The results obtained from the optimal urban form scenario showed that the higher the ratio of height to width of urban valleys, the temperature and thermal comfort index decrease, but the humidity increases. Also, the location of the buildings in the northeast to southwest direction has the lowest temperature and thermal comfort of PET, but it has more humidity.
Keywords
- Urban Heat Islands
- Urban Cooling Islands
- Water Bodies
- Urban Morphology
- ENVI-met
- Physiological Equivalent Temperature (PET)
Main Subjects
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