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The Impact of Urban Roughness on Outdoor Thermal Comfort in Hot Arid Climate

Author(s): Susan Abed Hassan , Zainab Abdul Kareem Abdul Lateef
Author(s) information:
Architectural engineering Department, Engineering collage,Al-Nahrain University, Baghdad, Iraq

Corresponding author

The proportion of the world's population living in cities is rapidly increasing, presenting new challenges to the urban environment and quality of life. Among these challenges is the urban environment's impact on residents' outdoor thermal comfort, which can affect their health and well-being. Urban roughness, which includes building and street heights, has a significant impact on the thermal environment of urban areas. Changes in these factors cause variations in temperature distribution, wind speed, and humidity, which affect how people perceive thermal conditions. The research problem is the effect of urban roughness on outdoor thermal comfort in hot arid climate, specifically the height of buildings and the density, for a case study in (Al-Bab Al-Sharqi) in  Baghdad city. Measurement method that employed the computer programs (Rino8 and Grasshopper) to calculate the thermal comfort index (UTCI) and its impact on various climatic variables. The findings revealed that the thermal comfort index and the climatic factors associated with it vary depending on the configuration of buildings.

Chen, Y.-C.; Fröhlich, D.; Matzarakis, A.; Lin, T.-P. (2017). Urban roughness estimation based on digital building models for urban wind and thermal condition estimation—Application of the SkyHelios model. Atmosphere, 8(12), 247. https://doi.org/10.3390/atmos8120247.

Urban, A.; Di Napoli, C.; Cloke, H.L.; Kyselý, J.; Pappenberger, F.; Sera, F.; Schneider, R.; Vicedo-Cabrera, A.M.; Acquaotta, F.; Ragettli, M.S.; Íñiguez, C.; Tobias, A.; Indermitte, E.; Orru, H.; Jaakkola, J.J.K.; Ryti, N.R.I.; Pascal, M.; Huber, V.; Schneider, A.; de’ Donato, F.; Michelozzi, P.; Gasparrini, A. (2021). Evaluation of the ERA5 reanalysis-based Universal Thermal Climate Index on mortality data in Europe. Environmental Research, 198, 111227. https://doi.org/10.1016/j.envres.2021.111227.

Standard 55-2013 (accessed on 1 August 2024) Available online: https://ierga.com/hr/wp-content/uploads/sites/2/2017/10/ASHRAE-55-2013.pdf.

Ibraheem, S. Q.; Hassan, S. A. (2020). The effect of the characteristics formation of urban open space on thermal comfort for pedestrian. IOP Conference Series: Materials Science and Engineering, 881(1), 012016. https://doi.org/10.1088/1757-899X/881/1/012016.

Hyader, S.; Hassan, S. (2022). The effect of different urban forms on microclimate in hot arid climates. Kerbala Journal for Engineering Sciences, 2(1), 1–10.

Jameel, S.M.; Hassan, S.A. (2022). Urban adaptation impact on outdoor thermal comfort in educational complexes. Acta Scientiarum Polonorum Administratio Locorum, 21(4), 529–538. http://doi.org/10.31648/aspal.7879.

Abdullah, S.A.F.; Hassan, S.A. (2024). Assessing the effects of street morphology on thermal comfort in hot arid urban environments. Journal of Interior Designing and Regional Planning, 9(2), 14–23. https://doi.org/10.46610/JoIDRP.2024.v09i02.002.

Hassan, S.A. (2020). The effect of residential building façade design on energy consumption for hot desert climate. IOP Conference Series: Materials Science and Engineering, 928, 022029. https://doi.org/10.46610/JoIDRP.2024.v09i02.002.

Hadi, M.; Hassan, S.A. (2022). The effect of vegetation on improving microclimate for public buildings in hot arid cities. Journal of Interior Designing and Regional Planning, 7(2), 1–10.

Dirksen, M.; Ronda, R.J.; Theeuwes, N.E.; Pagani, G.A. (2019). Sky view factor calculations and its application in urban heat island studies. Urban Climate, 30, 100498. https://doi.org/10.1016/j.uclim.2019.100498.

Lai, A.; Maing, M.; Ng, E. (2017). Observational studies of mean radiant temperature across different outdoor spaces under shaded conditions in densely built environments. Building and Environment, 114, 397–409. https://doi.org/10.1016/j.buildenv.2016.12.034.

Sedira, S.; Mazouz, S. (2023). The effect of urban geometry on outdoor thermal comfort. Application of the UTCI index in hot and arid climates. Technium: Romanian Journal of Applied Sciences and Technology, 6, 23–31. https://doi.org/10.47577/technium.v2021i.8140.

Wang, M.; Xu, H. (2021). The impact of building height on urban thermal environment in summer: A case study of Chinese megacities. PLoS ONE, 16(4), e0247786. https://doi.org/10.1371/journal.pone.0247786.

Yu, K.; Chen, Y.; Wang, D.; Chen, Z.; Gong, A.; Li, J. (2019). Study of the seasonal effect of building shadows on urban land surface temperatures based on remote sensing data. Remote Sensing, 11(5), 497. https://doi.org/10.3390/rs11050497.

Najeeb, D.M.; Hassan, S.A. (2019, April). The effect of urban fabric type on the street canyon airflow. IEEE Explore, 2019 4th Scientific International Conference Najaf (SICN), 195–199. https://doi.org/10.1109/SICN47020.2019.9019360.

About this article

SUBMITTED: 12 August 2024
ACCEPTED: 29 September 2024
PUBLISHED: 7 October 2024
SUBMITTED to ACCEPTED: 48 days
DOI: https://doi.org/10.53623/csue.v4i2.475

Cite this article
Hassan, S. A. ., & Abdul Lateef , Z. A. K. . (2024). The Impact of Urban Roughness on Outdoor Thermal Comfort in Hot Arid Climate . Civil and Sustainable Urban Engineering, 4(2), 76–82. https://doi.org/10.53623/csue.v4i2.475
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