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Study of regional air pollutant dispersion scenarios and atmospheric capacity changes based on spatial structure analysis of source intensity—the case of Hohhot, China

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Abstract

This paper takes Hohhot as the research area, aiming at the four typical atmospheric pollutants of PM2.5, PM10, SO2, and NOx, and targeting the spatial layout scenarios of different pollution sources. Based on the topological structure analysis method, the CALPUFF model was used to simulate and analyze the linear, divergent, and circular distribution scenarios of pollution sources. ArcGIS and Surfer were used to characterize the diffusion scenarios of four air pollutants under three different spatial structure scenarios and the influence of different spatial structures on the exceeding rate and extreme value of pollutant emissions in small and large regions. A comparison of the results showed that for the small area, the linear distribution of pollution sources has the smallest impact on the environment of the small area by integrating the four pollutants. For the whole region of Hohhot, the residual environmental capacity of PM2.5, PM10, and NOx is the largest under the linear distribution scenario of pollution sources. Considering the residual environmental capacity of the four pollutants, the spatial carrying capacity of the linear distribution scenario of pollution sources is the best for large regions. This paper adopted the method of spatial layout regulation to improve the regional environmental capacity and provided feasible analysis method reference and technical implementation route. Finally, different air pollutant load shedding strategies were proposed according to the distribution characteristics of pollution sources in the study area, providing scientific references and suggestions for different industrial state site selection.

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The datasets generated and analyzed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

This work was supported by Hohhot Ecological Environment Bureau.

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All authors contributed to the study conception and design. Supervision and project administration were performed by [Tianxin Li]. Software, formal analysis, and methodology were performed by [Zichen Li], [Shikun Cheng], and [Xiugui Wang]. The first draft of the manuscript was written by [Anni Zou] and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Zichen Li.

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Li, T., Li, Z., Zou, A. et al. Study of regional air pollutant dispersion scenarios and atmospheric capacity changes based on spatial structure analysis of source intensity—the case of Hohhot, China. Air Qual Atmos Health 16, 127–147 (2023). https://doi.org/10.1007/s11869-022-01262-4

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  • DOI: https://doi.org/10.1007/s11869-022-01262-4

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