The effect of urban shading and canyon geometry on outdoor thermal comfort in hot climates: A case study of Ahvaz, Iran

This study investigated the role of urban geometry and shading in improving pedestrians’ thermal comfort hot climate Ahvaz, Iran. Six canyons are selected Ahvaz. To determine outdoor range, micrometeorological measurements questionnaire survey were conducted July 2018. ENVI-met is used to investigate shadings. evaluate comfort, physiologically equivalent temperature (PET) calculated using RayMan. Using results field studies, range Ahvaz obtained within 19.6 °C 30.9 PET. Simulation show that closer canyon orientation north-south direction, lower air (Ta) mean radiant (MRT) are. Also, by reducing aspect ratio, PET increases as well. Urban shadings decreased MRT up 34 17.6 °C, respectively. In contrast, did not affect temperature, significantly. reduction caused more notable east-west canyons, well wider canyons. all cases highly correlated SVF. The observations showed no strong correlation between Ta, relative humidity, wind speed, with SVF