Studies on Ventilation and Air Pollution in Urban Street Canyons:A Review
With the rapid and highly intensified process of urbanization,more people are exposed to the hazards of vehicle exhaust.Moreover,due to its frequent social activities and serious pollution,street canyons have become a hot topic.The evaluation indexes in the research of the ventilation and urban air pollution in street canyons are divided into the ventilation capacity index,the pollution dispersal ability index,the pollution concentration index.The ventilation and pollution in street canyons are influenced by four factors,including street canyon morphology,architectural morphology,directions of streets and winds,and facilities in street canyons.Based on the existing research,urban planning suggestions are put forward and several potential research directions are prospected as follows.1) Building the comprehensive index taking different people into account.2) Establishing the function relationship between evaluation indexes and influencing factors.3) Research on asymmetrical street canyons.4) Architectural design for less pollution exposure in street canyons.5) Research on spatial and temporal dynamic of the influence of solar radiation.6) Best configuration of facilities in street canyons.7) Tailored planning suggestions for a city.8) Coupling the photochemistry,particle dynamics and anthropogenic heat.
NETL
NSTL
万方数据
维普
