Determination of PM10 emission rate in Vacant lands using CALPUFF dispersion model

Document Type : Original Article

Authors

1 Faculty of Natural Resources and Environment,, Science and Research Branch, Islamic Azad University, Tehran,Iran

2 Department of Environmental Technologies, Environmental Sciences Research Institute,, Shahid Beheshti University, Tehran, Iran

Abstract

Introduction: Dust is one of the most important atmospheric phenomena It happens in spring and summer in many regions, including Iran and neighboring countries And it is one of the important challenges of the 21st century And this phenomenon in the global scale of arid and semi-arid regions and due to climate change, vegetation change, progressive processes of soil erosion and disturbances resulting from them, the sensitivity of the regions to rapid erosion which will have important reactions on the climate of the region and desertification. The purpose of this research is to determine the intensity of the pollution production rate of suspended particles less than 10 microns using modeling and comparing the output results with the measured data. and changing the intensity of the pollution production rate based on the measured data and calculating the formula for determining the PM10 emission rate It is caused by the dust incident in Ahvaz city.
Material and methods: Ahvaz metropolis considering the complex topography In a dry area and in the vicinity of the main and primary sources of dust, it has special conditions In this study, the concentration of suspended particles less than 10 microns was investigated on the 15th of June 2019. On this date, the maximum PM10 concentration in Ahvaz city was 1422 micrograms per cubic meter on June 15. that the concentration of these particles was more than 9 times the standard concentration of free air of the Environmental Protection Organization of Iran (150 micrograms per cubic meter). From the concentration data of the environmental protection organization measurement station and surface meteorological and upper atmosphere data of Ahvaz station have been used to implement CALPUFF model and concentration outputs
Results and discussion: By studying library documents, the basic calculation formula for determining the emission rate of PM10 pollutant has been estimated, and then it has been compared with the data of the monitoring stations located in the city of Ahvaz, and by modifying the calculation formula and implementing the CALPUFF diffusion and dispersion model, it has been calculated according to the actual concentration recorded by the online station. The monitoring of the Environmental Protection Organization was reached and finally the emission rate of suspended particles less than 10 microns from the centers around the city of Ahvaz was determined.
Conclusion: The emission rate of PM10 pollutant has been obtained using the calculation formula and the implementation of the CALPUFF diffusion and dispersion model, which is important in the prediction of the dust phenomenon and provides the possibility of calculating the amount of production and the movement path of the particles. He thought about taking the necessary decisions to reduce the possible damages caused by this phenomenon. And using the combination of measurement and modeling, he achieved a methodology to calculate PM10 dust emissions from city centers.

Keywords

References

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Environmental Sciences
Volume 20, Issue 4
2023
Pages 277-290

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