Article (Scientific journals)
Effect of Street Asymmetry, Albedo, and Shading on Pedestrian Outdoor Thermal Comfort in Hot Desert Climates
Necira, Hakima; Matallah, Mohamed Elhadi; Bouzaher, Soumia et al.
2024In Sustainability, 16 (3), p. 1291
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Keywords :
boulevard; heat stress; mitigation strategies; physiological equivalent temperature; spatial configuration; ENVI-met; walkability
Abstract :
[en] Improving urban walkability in the face of climate change is a critical challenge for urban designers. Street design strategies can mitigate heat stress and enhance pedestrian livability. Most previous studies conducted in hot climates recommend adopting deep canyons to improve summer conditions, overlooking the potential improvement of wide streets as essential structural elements of the urban fabric. This study was conducted in Biskra city, southern Algeria, where several mitigation strategies were applied to ‘Emir Abdelkader Boulevard’, as the main structural street inside the city, to create an optimal street model for arid climates. Five scenarios were developed based on three criteria: (Sc1) asymmetric profile northeast side (NES) > southwest side (SWS); (Sc2) asymmetric profile SWS > NES; (Sc3) cool paving; (Sc4) horizontal shading; and(Sc5) shading with a linear tree arrangement. ENVI-met software version 5.1.1 and the RayMan model were used to estimate the local climate conditions and outdoor thermal comfort levels based on the physiological equivalent temperature (PET). All scenarios reduced PET values across the street, with optimal reductions of −2.0 ◦C, −3.1 ◦C, −1.3 ◦C, −1.7 ◦C, and −1.2 ◦C in Sc1, Sc2, Sc3, Sc4, and Sc5, respectively. Concerning pedestrian areas, the optimal results durations were at the southwest side below the arcades’ sidewalks during peak hours: Sc2, Sc3, Sc4, Sc5 (2.2 ◦C–3 H, 2.3 ◦C–3 H, 2.4 ◦C–3 H, 2.5 ◦C–2 H). Sc1 performed best during daytime hours on the northeast side. The utilizing of these results can strongly help urban planners and landscape architects in creating climate-responsive streets that enhance citizens’ quality of life.
Research center :
Laboratory of Design and Modelling of Architectural and Urban Forms and Ambiances (LACOMOFA), Department of Architecture, University of Biskra, Biskra 07000, Algeria;
Department of Architecture, Faculty of Architecture and Town Planning (FATP), Aror University of Art, Architecture, Design and Heritage, Sukkur 65200, Pakistan
Sustainable Building Design (SBD) Lab, Department of Urban and Environmental Engineering (UEE), Faculty of Applied Sciences, Université de Liège, 4000 Liège, Belgium
Disciplines :
Architecture
Author, co-author :
Necira, Hakima;  University of Biskra, Biskra 07000, Algeria > Laboratory of Design and Modelling of Architectural and Urban Forms and Ambiances (LACOMOFA), Department of Architecture
Matallah, Mohamed Elhadi;  University of Biskra, Biskra 07000, Algeria > Laboratory of Design and Modelling of Architectural and Urban Forms and Ambiances (LACOMOFA), Department of Architecture
Bouzaher, Soumia;  University of Biskra, Biskra 07000, Algeria > Laboratory of Design and Modelling of Architectural and Urban Forms and Ambiances (LACOMOFA), Department of Architecture
Mahar, Waqas Ahmed  ;  Université de Liège - ULiège > Urban and Environmental Engineering  ; Aror University of Art, Architecture, Design and Heritage, Sukkur 65200, Pakistan > Department of Architecture, Faculty of Architecture and Town Planning (FATP)
Language :
English
Title :
Effect of Street Asymmetry, Albedo, and Shading on Pedestrian Outdoor Thermal Comfort in Hot Desert Climates
Publication date :
02 February 2024
Journal title :
Sustainability
eISSN :
2071-1050
Publisher :
Multidisciplinary Digital Publishing Institute (MDPI), Basel, Switzerland
Volume :
16
Issue :
3
Pages :
1291
Peer reviewed :
Peer Reviewed verified by ORBi
Development Goals :
3. Good health and well-being
11. Sustainable cities and communities
Available on ORBi :
since 03 February 2024

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