[en] The quality of the thermal urban environment plays a vital role in outdoor human activities and the overall quality of life in residential neighborhoods. This study investigated the influence of two urban form variables, the height to width ratio (H/W) and sky view factor (SVF), on three outdoor thermal environmental parameters (OTEP), direct solar radiation (DSR), mean radiant temperature (MRT), and air temperature (AT) in three neighborhoods in the hot and dry city of Biskra, Algeria. The research followed a three-step process: Three neighborhoods with varying urban form variables were selected, and field measurements of thermal parameters were conducted at various locations during the hottest period of the year. Numerical modeling, simulation, and validation using Envi-met were then performed to gather the remaining outdoor thermal environmental parameters (OTEP; DSR and MRT). Statistical modeling and regression analysis were conducted to investigate the interaction between urban form variables and OTEP. The results showed that increasing the H/W ratio by 1 reduces MRT and AT by 11.79 °C and 1.49 °C, respectively, while decreasing the SVF by 0.1 reduces MRT and AT by 4.173 °C and 0.479 °C, respectively.
Research Center/Unit :
Sustainable Building Design Lab
Disciplines :
Architecture
Author, co-author :
Qaoud, Rami; LACOMOFA Laboratory, Department of Architecture, University of Biskra, Biskra, Algeria
Adel, Boumerzoug; LACOMOFA Laboratory, Department of Architecture, University of Biskra, Biskra, Algeria
Sayad, Bouthaina; Department of Architecture, Guelma, Algeria
Alkama, Djamal; Department of Architecture, Guelma, Algeria
Attia, Shady ; Université de Liège - ULiège > Département ArGEnCo > Techniques de construction des bâtiments
Language :
English
Title :
Assessing the influence of neighborhood urban form on outdoor thermal conditions in the hot dry city of Biskra, Algeria
Lynas, M., Houlton, B.Z., Perry, S., Greater than 99% consensus on human caused climate change in the peer-reviewed scientific literature. Environ Res Lett, 16(11), Oct. 2021, 114005, 10.1088/1748-9326/ac2966.
‘Sustainable Urban Energy Planning, a handbook for cities and towns in developing countries’, p. 83.
Salvati, A., Coch Roura, H., Cecere, C., Barcelona case study. Assessing the urban heat island and its energy impact on residential buildings in Mediterranean climate. Energ Buildings 146 (2017), 38–54, 10.1016/j.enbuild.2017.04.025.
Lau, K.-K.-L., Ren, C., Ho, J., Ng, E., Numerical modelling of mean radiant temperature in high-density sub-tropical urban environment. Energ Buildings 114 (2016), 80–86, 10.1016/j.enbuild.2015.06.035.
Emmanuel, R., Fernando, H., Urban heat islands in humid and arid climates: role of urban form and thermal properties in Colombo, Sri Lanka and Phoenix, USA. Clim Res 34 (2007), 241–251, 10.3354/cr00694.
Unger, J., Intra-urban relationship between surface geometry and urban heat island: review and new approach. Clim Res 27:3 (2004), 253–264, 10.3354/cr027253.
Kim, J., Lee, D.-K., Brown, R.D., Kim, S., Kim, J.-H., Sung, S., The effect of extremely low sky view factor on land surface temperatures in urban residential areas. Sustain Cities Soc, 80, 2022, 103799, 10.1016/j.scs.2022.103799.
Salata, F., Golasi, I., de Lieto Vollaro, R., de Lieto Vollaro, A., Urban microclimate and outdoor thermal comfort. A proper procedure to fit ENVI-met simulation outputs to experimental data. Sustain Cities Soc 26 (2016), 318–343, 10.1016/j.scs.2016.07.005.
Faragallah, R.N., Ragheb, R.A., Evaluation of thermal comfort and urban heat island through cool paving materials using ENVI-Met. Ain Shams Eng J, 13(3), 2022, 101609, 10.1016/j.asej.2021.10.004.
Salameh, M., Mushtaha, E., El Khazindar, A., Improvement of thermal performance and predicted mean vote in city districts: A case in the United Arab Emirates. Ain Shams Eng J, 2022, 101999, 10.1016/j.asej.2022.101999.
Lam, C.K.C., Lee, H., Yang, S.-R., Park, S., A review on the significance and perspective of the numerical simulations of outdoor thermal environment. Sustain Cities Soc, 71, 2021, 102971, 10.1016/j.scs.2021.102971.
Shooshtarian, S., Rajagopalan, P., Wakefield, R., Effect of seasonal changes on usage patterns and behaviours in educational precinct in Melbourne. Urban Clim 26 (2018), 133–148, 10.1016/j.uclim.2018.08.013.
Shooshtarian, S., Rajagopalan, P., Perception of Wind in Open Spaces. Climate, 7(9), Sep. 2019, 106, 10.3390/cli7090106.
Shooshtarian, S., Rajagopalan, P., Study of thermal satisfaction in an Australian educational precinct. Build Environ 123 (2017), 119–132, 10.1016/j.buildenv.2017.07.002.
Shooshtarian, S., Ridley, I., The effect of individual and social environments on the users thermal perceptions of educational urban precincts. Sustain Cities Soc 26 (2016), 119–133, 10.1016/j.scs.2016.06.005.
Shooshtarian, S., Ridley, I., The effect of physical and psychological environments on the users thermal perceptions of educational urban precincts. Build Environ 115 (2017), 182–198, 10.1016/j.buildenv.2016.12.022.
Shooshtarian, S., Lam, C.K.C., Kenawy, I., Outdoor thermal comfort assessment: A review on thermal comfort research in Australia. Build Environ, 177, 2020, 106917, 10.1016/j.buildenv.2020.106917.
Lyu, T., Buccolieri, R., Gao, Z., A numerical study on the correlation between sky view factor and summer microclimate of local climate zones. Atmosphere, 10(8), 2019, 8, 10.3390/atmos10080438.
ONS, ‘Resident population by age, sex and wilaya’. National office of statistics, 2008. [Online]. Available: https://www.ons.dz/IMG/pdf/pop3_national.pdf.
Boukhabla, M., Alkama, D., Bouchair, A., The effect of urban morphology on urban heat island in the city of Biskra in Algeria. Int J Ambient Energy 34:2 (2013), 100–110, 10.1080/01430750.2012.740424.
Djamel, A., ‘Analyse typologique de l'habitat - cas de Biskra’, Master. 1995, University Mohamed Khider Biskra.
Benamor, K., Benabbas, M., Effect of Street Morphology on Buildings’ Thermal Storage in a Hot and Arid Climate: Case Study of Biskra (Algeria). J Build Mater Struct 6:2 (2019), 97–106, 10.34118/jbms.v6i2.72.
Naidja A, Zedira K, and Bourbia F. The effect of geometrical parameters of urban street on shading requirement in hot arid climate-Contemporary urban street of Biskra, 2017.
Živković J. Urban Form and Function. Climate Action. In: Leal Filho W, Azeiteiro U, Azul AM, Brandli L, Özuyar PG, and Wall T. (eds.), Encyclopedia of the UN Sustainable Development Goals. Cham: Springer International Publishing. 2019, pp. 1–10. doi: 10.1007/978-3-319-71063-1_78-1.
Marzluff, J., et al. Urban Ecology: An International Perspective on the Interaction between Humans and Nature. 2008, Springer Science & Business Media.
Al-Sudani A, Hussein H, and Sharples S. Sky View Factor Calculation.
Bakarman, M.A., Chang, J.D., The influence of height/width ratio on urban heat island in hot-arid climates. Proc Eng 118 (2015), 101–108, 10.1016/j.proeng.2015.08.408.
Sengupta, M., Xie, Y., Lopez, A., Habte, A., Maclaurin, G., Shelby, J., The national solar radiation data base (NSRDB). Renew Sustain Energy Rev 89 (2018), 51–60, 10.1016/j.rser.2018.03.003.
‘Fundamentals of Meteorology - Vlado Spiridonov, Mladjen Ćurić - Google Books’. https://books.google.dz/books?id=kGcHEAAAQBAJ&pg=PA72&dq=air+temperature+definition&hl=en&sa=X&ved=2ahUKEwi5j8O94J38AhVR8LsIHR0QAcIQ6AF6BAgIEAI#v=onepage&q=air%20temperature%20definition&f=false (accessed Dec. 29, 2022).
‘Human Thermal Environments: The Effects of Hot, Moderate, and Cold. - Ken Parsons - Google Books’. https://books.google.dz/books?id=htHv0ovtZzIC&pg=PA3&dq=mean+radiant+temperature+definition&hl=en&sa=X&ved=2ahUKEwiPlN3Y4J38AhVPi_0HHZvYD6cQ6AF6BAgEEAI#v=onepage&q=mean%20radiant%20temperature%20definition&f=false (accessed Dec. 29, 2022).
C. Cerezo Davila, ‘Building archetype calibration for effective urban building energy modeling’, Thesis, Massachusetts Institute of Technology, 2017. Accessed: Apr. 06, 2021. [Online]. Available: https://dspace.mit.edu/handle/1721.1/111487.
Lovvorn, N.C., et al. ASHRAE Standards Committee, 2001–2002’.
Sharma, A.K., Text Book of Correlations and Regression. Discovery Publishing House, 2005.
Qaoud, R., Djamal, A., The impact of constructivism density of the urban fabric in improving the urban ambience- thermal, visual - of the street, for Saharian Cities. Casa Study of the City of Biskra: Proc Plea 01 (2017), 820–826.
Qaoud, R., Djamal, A., The Role of l/w in the Sola r Radiation for Saharian Cities. J E3S Web Conf, 91, 2019, P 05006.
Qaoud, R., Djamal, A., The role of the urban fabric in reducing of the physical loads for the environment applied within the free space - street-, For Saharan Cities, sample study of the City of Biskra -Algerie. Energy Proc 157 (2019), 02–09.