Study on the Dispersion Law of Typical Pollutants in Winter by Complex Geographic Environment Based on the Coupling of GIS and CFD—A Case Study of the Urumqi Region
Urumqi is located at the northern foot of the Tianshan Mountains. Its topographical features have a significant impact on the transport and dispersion of air pollutants. Moreover, its winter is extremely long, lasting up to six months. A combination of an irrational energy consumption structure, uni...
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2025-02-01
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| author | Jianzhou Jiang Afang Jin |
| author_facet | Jianzhou Jiang Afang Jin |
| author_sort | Jianzhou Jiang |
| collection | DOAJ |
| description | Urumqi is located at the northern foot of the Tianshan Mountains. Its topographical features have a significant impact on the transport and dispersion of air pollutants. Moreover, its winter is extremely long, lasting up to six months. A combination of an irrational energy consumption structure, unique meteorological conditions, and complex geographical terrains has led to a substantial increase in NO<sub>2</sub> emissions, severely damaging the local ecological environment. In this study, we integrate Geographic Information System (GIS) and Computational Fluid Dynamics (CFD). By leveraging GIS’s powerful spatial analysis capabilities and CFD’s high-precision fluid simulation technology, we significantly enhance the simulation accuracy of complex phenomena like airflow and pollutant diffusion. Additionally, the inverse distance weighted interpolation method is comprehensively employed to analyze the Air Quality Indices (AQIs) of typical pollutants in different districts of Urumqi during winter. The results reveal that high altitude causes instability of the dominant near-surface winds within the atmospheric boundary layer. The increasing frequency of surface calm winds reduces the advective transport of atmospheric pollutants. Topography and winter meteorological conditions are identified as the primary factors contributing to pollutant accumulation. This research not only unveils the fundamental mechanisms of pollutant dispersion in mountainous terrains but also validates the practicality of coupling GIS and CFD, providing a theoretical basis for pollution dispersion studies in this region. This study reveals the general laws of pollutant dispersion in mountainous terrain, resolves the issue of establishing complex geographical models, and demonstrates the feasibility of coupling the GIS and CFD. Meanwhile, it provides a theoretical basis for pollution dispersion in this region. |
| format | Article |
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| institution | DOAJ |
| issn | 2076-3417 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | MDPI AG |
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| spelling | doaj-art-6b7ff2be483844fd87f26db5dbb307d42025-08-20T02:53:19ZengMDPI AGApplied Sciences2076-34172025-02-01155246910.3390/app15052469Study on the Dispersion Law of Typical Pollutants in Winter by Complex Geographic Environment Based on the Coupling of GIS and CFD—A Case Study of the Urumqi RegionJianzhou Jiang0Afang Jin1Mechanical Engineering College, Xinjiang University, Urumqi 830017, ChinaMechanical Engineering College, Xinjiang University, Urumqi 830017, ChinaUrumqi is located at the northern foot of the Tianshan Mountains. Its topographical features have a significant impact on the transport and dispersion of air pollutants. Moreover, its winter is extremely long, lasting up to six months. A combination of an irrational energy consumption structure, unique meteorological conditions, and complex geographical terrains has led to a substantial increase in NO<sub>2</sub> emissions, severely damaging the local ecological environment. In this study, we integrate Geographic Information System (GIS) and Computational Fluid Dynamics (CFD). By leveraging GIS’s powerful spatial analysis capabilities and CFD’s high-precision fluid simulation technology, we significantly enhance the simulation accuracy of complex phenomena like airflow and pollutant diffusion. Additionally, the inverse distance weighted interpolation method is comprehensively employed to analyze the Air Quality Indices (AQIs) of typical pollutants in different districts of Urumqi during winter. The results reveal that high altitude causes instability of the dominant near-surface winds within the atmospheric boundary layer. The increasing frequency of surface calm winds reduces the advective transport of atmospheric pollutants. Topography and winter meteorological conditions are identified as the primary factors contributing to pollutant accumulation. This research not only unveils the fundamental mechanisms of pollutant dispersion in mountainous terrains but also validates the practicality of coupling GIS and CFD, providing a theoretical basis for pollution dispersion studies in this region. This study reveals the general laws of pollutant dispersion in mountainous terrain, resolves the issue of establishing complex geographical models, and demonstrates the feasibility of coupling the GIS and CFD. Meanwhile, it provides a theoretical basis for pollution dispersion in this region.https://www.mdpi.com/2076-3417/15/5/2469topographicair pollution transportflow fieldAQI valuescoupling |
| spellingShingle | Jianzhou Jiang Afang Jin Study on the Dispersion Law of Typical Pollutants in Winter by Complex Geographic Environment Based on the Coupling of GIS and CFD—A Case Study of the Urumqi Region Applied Sciences topographic air pollution transport flow field AQI values coupling |
| title | Study on the Dispersion Law of Typical Pollutants in Winter by Complex Geographic Environment Based on the Coupling of GIS and CFD—A Case Study of the Urumqi Region |
| title_full | Study on the Dispersion Law of Typical Pollutants in Winter by Complex Geographic Environment Based on the Coupling of GIS and CFD—A Case Study of the Urumqi Region |
| title_fullStr | Study on the Dispersion Law of Typical Pollutants in Winter by Complex Geographic Environment Based on the Coupling of GIS and CFD—A Case Study of the Urumqi Region |
| title_full_unstemmed | Study on the Dispersion Law of Typical Pollutants in Winter by Complex Geographic Environment Based on the Coupling of GIS and CFD—A Case Study of the Urumqi Region |
| title_short | Study on the Dispersion Law of Typical Pollutants in Winter by Complex Geographic Environment Based on the Coupling of GIS and CFD—A Case Study of the Urumqi Region |
| title_sort | study on the dispersion law of typical pollutants in winter by complex geographic environment based on the coupling of gis and cfd a case study of the urumqi region |
| topic | topographic air pollution transport flow field AQI values coupling |
| url | https://www.mdpi.com/2076-3417/15/5/2469 |
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