Construction Of Urban Ventilation Corridors Based On The Temporal And Spatial Distribution Of Air Pollutant PM_2.5

The phenomenon of"smog"caused by PM_2.5pollutants produced during the rapid development of cities is not uncommon.Exposure to PM_2.5pollutants poses a huge threat to human health and the living environment.Utilizing urban ventilation to improve urban air pollutants is also one of the important means to control urban air pollution.This paper takes Xicheng District of Daqing City as the research object,and explores the construction of urban ventilation corridors based on the temporal and spatial distribution of PM_2.5 in Xicheng District of Daqing City,as a means of mitigating and controlling PM_2.5pollutants.First of all,in order to control PM_2.5,it is necessary to analyze the climate characteristics of the study area and the temporal and spatial distribution of PM_2.5.The concentration of PM_2.5 pollutants in Xicheng District of Daqing City has obvious seasonal periodicity,and the control of PM_2.5 in winter is the most critical.The spatial distribution of PM_2.5 presents the characteristics of"high in the north and south,low in the middle,high in the east and low in the west".Secondly,the city’s three-dimensional spatial form data was collected on the geographic information platform to analyze the urban wind environment.It was found that the building density of Xicheng District was higher in the areas along Central Street and Chengfeng Street,lower in the area along the West Main Line,and higher in the area of building density.Areas with large surface roughness,low sky openness,and weak ventilation.Thirdly,the spatial-temporal distribution of PM_2.5 is combined with the potential of urban ventilation to construct urban ventilation corridors.The spatial distribution of PM_2.5,urban ventilation potential,building density,urban ventilation potential,and building density are respectively selected as the resistance surface to calculate the minimum cost path,and the calculation results are compared and synthesized to construct the urban ventilation corridor.Finally,the PM_2.5 pollution control measures based on the urban wind environment are proposed.From urban form planning and industrial land layout;using lakes and greening to reduce PM_2.5 concentration;controlling the source of pollutants and other measures;improving urban pollution conditions.