Investigation Of Air Pollution Sources And Characteristics Of Pollutant Concentration Distribution Based On AERMOD

With the increasingly serious problem of air pollution,it is very important to understand the regional air pollutant concentration distribution.The distribution of air pollutant concentration is affected by many factors.The purpose of this paper is to study the applicable concentration distribution characteristics of research methods,and on this basis,a reliable investigation of air pollution sources.The concentration distribution was simulated by AERMOD model parameters suitable for the urban area of Yangzhou,and then the main pollution factors and natural factors affecting the concentration distribution were analyzed,which provided the pertinence basis for air pollution control.In order to effectively control and control air pollution,many countries and scholars have carried out research on the distribution of air pollution source and concentration.There are many places worth learning and learning from these researches,and there is room for further research.Yangzhou has completed the compilation of the list of air pollution sources,but there is still a lack of research on the distribution of air pollutants.This paper puts forward two specific problems.First,how to improve the reliability of concentration distribution characteristics?Second,how to effectively improve the reliability of air pollution sources investigation and the calculation of pollutant emission in the region?.The study of this paper is carried out around the above two issues.The main results and conclusions are as follows:(1)A total of 4094 valid data were obtained from a total of 287 pollution sources after a survey of the time taken by the 48 investigators for a period of up to 5 days,Including 110 road information and traffic flow data of each road,28 construction sites and 7 concrete mixing stations,77 livestock and poultry farms,3 regional rice and wheat planting data,7 leather textile factory,8 furniture manufacturing plant,21 packaging printing factory,26 hospitals.(2)The sensitivity analysis of AERMOD model parameters shows that the sensitivity of the pollution source parameters is low.The Q-Q diagram and the correlation coefficient of the daily average concentration of the observed and simulated values show that the simulation results show that the selection of the surface parameters in this paper is reliable.(3)28 contour maps of concentration distribution are drawn.At the time scale of the year,there are 27 pollution sources in the leading wind direction of(0,0)and the contribution of SO2 concentration to the point of concern accounts for 62.55%of the total source.The high power plant and chemical source have great influence on the concentration of the concern point,which indicates that the location and intensity of the source of pollution have an influence on the spatial distribution of the concentration of concern.The typical daily pollution contribution rate of adverse calculation results show that the main pollution sources on the wind is just high pollution source strength,is not conducive to the interest distribution point concentration space.In November,the concentration distribution ISO line diffusion degree was the least,which was mainly formed under the dual effects of low wind speed and low temperature.The meteorological factors affecting the concentration time distribution of SO2 in Yangzhou city were analyzed by comparing the contour map of SO2 concentration distribution in each season.The results show that the main meteorological factors affecting the concentration time distribution of SO2 are wind direction,and the influence of cloud amount and temperature is not significant,The main meteorological factors affecting the concentration time distribution of SO2 concentration in the winter of Yangzhou city are the temperature.Low temperature makes the pollutant not easy to spread,resulting in a higher concentration of concern..