Research On Three-dimensional Spatial Sistribution Of Air Pollution Based On Unmanned Aerial Vehicle

In the process of urban infrastructure construction,industrial production and residents’life,a large number of atmospheric pollutants are produced,resulting in the deterioration of the atmospheric environment.It has a serious impact on human travel,physical health,enviromental quality and so on,which makes the atmospheric environmental quality situation of concern.There is distribution of atmospheric pollutants at different positions in the horizontal and different heights in vertical.And the past monitoring methods with limitations at cost,scope of application,operability,etc.In this study,data collection was conducted in consecutive days when the wind speed in winter and summer was about 1.5 m/s(static wind)and the weather conditions and temperature were stable.In winter,the data collection height is 1.5 m;in summer,the data collection height is 5m,15m,30m,50m,75m,100m and 120m.Air pollutants include PM2.5,PM10,NO2,SO2,CO and O3.According to the spatial interpolation theory and classification system,as well as the characteristics of main methods,the spatial interpolation method and its setting combination are determined.Cross-validation method is used to determine the most suitable spatial interpolation method for different data and its Settings,so as to obtain the spatial distribution resultsThe main research contents and conclusions are as follows:(1)The concentration of PM2.5,PM10,NO2,SO2 and CO in winter is significantly higher than that in summer,while the concentration of O3 is significantly different from the other 5 air pollutants.The concentration of O3 in summer is significantly higher than that in winter.(2)The concentration of PM2 5,PM10,CO and O3 changed greatly in the two seasons,showing obvious seasonal differences and strong spatial distribution law,while NO2 and SO2 were on the contrary,Its concentration has little change in the two seasons,showing inapparent seasonal differences and weak spatial distribution law(3)The atmospheric pollution in Baiyun District is affected not only by the main urban area of Baiyun District but also by the main urban area of Guanshan Lake District in the South and the central urban area of Guiyang City in the southeast,where the population and building density are greater The air pollution in Baiyun district may be affected by the main urban area of Guanshanhu district in the south and the central urban area of Guiyang city in the southeast with higher population and building density.,1)The spatial distribution of PM2.5 and PM10 concentrations in summer and SO2 and CO concentrations in winter and summer showed a trend of high concentration in the south and low concentration in the north.2)In winter,the concentration of PM2.5 and PM10,and the concentration of NO2 in winter and summer show a trend of low spatial distribution in the high suburbs of the main urban area.It could have a big impact from the regionlocal.3)The overall spatial distribution of O3 concentration is irregular.(34)the The atmospheric environment in Baiyun district of Guiyang city is most polluted by particulate matter during winter and summer data collection.The primary pollutant is PM2.5.(5)The AQI estimation range during winter data collection is 78 to 119.The AQI estimation range during the summer data collection period ranges from 50 to 62,and the air pollution level in the whole region is level 2.(46)during During the summer data collection in Baiyun district,Guiyang city,the average concentration of air pollutants varies with altitude at the height of 5 m to 120 m;1)The average concentration of PM2.5,SO2 and CO in the atmosphere increased slightly at the height of 5 m to 120 m,and then decreased at the height of 15 m.2)The average concentration of PM10 showed a continuous decrease.However,the average concentration of NO2 decreased slightly at first,and a low value appeared at the height of 15 m,and then increased.3)The average concentration of O3 showed a continuous upward trend.(57)During the summer data collection in Baiyun district,Guiyang city,the overall change rate of the average concentration of various pollutants in the atmospheric environment at different altitudes shows that CO is the largest,followed by SO2.Both pollutants regularly rise first and then fall.The following is PM10,which shows the state of alternating rise and fall with great difference.However,PM2.5,NO2 and O3 have similar changes,and the average concentration of PM2.5 tends to increase with the increase of height.NO2 and O3 are flat.