Fractal Analysis of Air Pollution Time Series in Urban Areas in Astana, Republic of Kazakhstan
The life quality of populations, especially in large agglomerations, is significantly reduced due to air pollution. Major sources of pollution include motor vehicles, industrial facilities and the burning of fossil fuels. A particularly significant source of pollution is thermal power plants and coa...
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| Format: | Article |
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MDPI AG
2024-08-01
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| Series: | Urban Science |
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| Online Access: | https://www.mdpi.com/2413-8851/8/3/131 |
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| author | Andrii Biloshchytskyi Alexandr Neftissov Oleksandr Kuchanskyi Yurii Andrashko Svitlana Biloshchytska Aidos Mukhatayev Ilyas Kazambayev |
| author_facet | Andrii Biloshchytskyi Alexandr Neftissov Oleksandr Kuchanskyi Yurii Andrashko Svitlana Biloshchytska Aidos Mukhatayev Ilyas Kazambayev |
| author_sort | Andrii Biloshchytskyi |
| collection | DOAJ |
| description | The life quality of populations, especially in large agglomerations, is significantly reduced due to air pollution. Major sources of pollution include motor vehicles, industrial facilities and the burning of fossil fuels. A particularly significant source of pollution is thermal power plants and coal-fired power plants, which are widely used in developing countries. The Astana city in the Republic of Kazakhstan is a fast-growing agglomeration where air pollution is compounded by intensive construction and the use of coal for heating. The research is important for the development of urbanism in terms of ensuring the sustainable development of urban agglomerations, which are growing rapidly. Long memory in time series of concentrations of air pollutants (particulate matter PM10, PM2.5) from four stations in Astana using the fractal R/S analysis method was studied. The Hurst exponents for the studied stations are 0.723; 0.548; 0.442 and 0.462. In addition, the behavior of the Hurst exponent in dynamics is studied by the flow window method based on R/S analysis. As a result, it was found that the pollution indicators of one of the stations are characterized by the presence of long-term memory and the time series is persistent. According to the analysis of recordings from the second station, the series is defined as close to random, and for stations 3 and 4, anti-persistence is characteristic. The calculated Hurst exponent values explain the sharp increase in pollution levels in October 2021. The reason for the increase in polluting substances concentration in the air is the close location of thermal power plants to the city. The method of time series fractal analysis can be the ecological state indicator in the corresponding region. Persistent pollution time series can be used to predict the occurrence of a critical pollution level. One of the reasons for anti-persistence or the occurrence of a temporary contamination level may be the close location of the observation station to the source of contamination. The obtained results indicate that the fractal time series analysis method can be an indicator of the ecological state in the relevant region. |
| format | Article |
| id | doaj-art-d02ec6ecdf954d1b8d3d93e26d4f0855 |
| institution | OA Journals |
| issn | 2413-8851 |
| language | English |
| publishDate | 2024-08-01 |
| publisher | MDPI AG |
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| series | Urban Science |
| spelling | doaj-art-d02ec6ecdf954d1b8d3d93e26d4f08552025-08-20T01:55:57ZengMDPI AGUrban Science2413-88512024-08-018313110.3390/urbansci8030131Fractal Analysis of Air Pollution Time Series in Urban Areas in Astana, Republic of KazakhstanAndrii Biloshchytskyi0Alexandr Neftissov1Oleksandr Kuchanskyi2Yurii Andrashko3Svitlana Biloshchytska4Aidos Mukhatayev5Ilyas Kazambayev6University Administration, Astana IT University, Astana 010000, KazakhstanResearch and Innovation Center “Industry 4.0”, Astana IT University, Astana 010000, KazakhstanDepartment of Computational and Data Science, Astana IT University, Astana 010000, KazakhstanDepartment of System Analysis and Optimization Theory, Uzhhorod National University, 88000 Uzhhorod, UkraineDepartment of Information Technology, Kyiv National University of Construction and Architecture, 03037 Kyiv, UkraineUniversity Administration, Astana IT University, Astana 010000, KazakhstanResearch and Innovation Center “Industry 4.0”, Astana IT University, Astana 010000, KazakhstanThe life quality of populations, especially in large agglomerations, is significantly reduced due to air pollution. Major sources of pollution include motor vehicles, industrial facilities and the burning of fossil fuels. A particularly significant source of pollution is thermal power plants and coal-fired power plants, which are widely used in developing countries. The Astana city in the Republic of Kazakhstan is a fast-growing agglomeration where air pollution is compounded by intensive construction and the use of coal for heating. The research is important for the development of urbanism in terms of ensuring the sustainable development of urban agglomerations, which are growing rapidly. Long memory in time series of concentrations of air pollutants (particulate matter PM10, PM2.5) from four stations in Astana using the fractal R/S analysis method was studied. The Hurst exponents for the studied stations are 0.723; 0.548; 0.442 and 0.462. In addition, the behavior of the Hurst exponent in dynamics is studied by the flow window method based on R/S analysis. As a result, it was found that the pollution indicators of one of the stations are characterized by the presence of long-term memory and the time series is persistent. According to the analysis of recordings from the second station, the series is defined as close to random, and for stations 3 and 4, anti-persistence is characteristic. The calculated Hurst exponent values explain the sharp increase in pollution levels in October 2021. The reason for the increase in polluting substances concentration in the air is the close location of thermal power plants to the city. The method of time series fractal analysis can be the ecological state indicator in the corresponding region. Persistent pollution time series can be used to predict the occurrence of a critical pollution level. One of the reasons for anti-persistence or the occurrence of a temporary contamination level may be the close location of the observation station to the source of contamination. The obtained results indicate that the fractal time series analysis method can be an indicator of the ecological state in the relevant region.https://www.mdpi.com/2413-8851/8/3/131urban air pollutionR/S analysistime series analysisHurst exponentPM10PM2.5 |
| spellingShingle | Andrii Biloshchytskyi Alexandr Neftissov Oleksandr Kuchanskyi Yurii Andrashko Svitlana Biloshchytska Aidos Mukhatayev Ilyas Kazambayev Fractal Analysis of Air Pollution Time Series in Urban Areas in Astana, Republic of Kazakhstan Urban Science urban air pollution R/S analysis time series analysis Hurst exponent PM10 PM2.5 |
| title | Fractal Analysis of Air Pollution Time Series in Urban Areas in Astana, Republic of Kazakhstan |
| title_full | Fractal Analysis of Air Pollution Time Series in Urban Areas in Astana, Republic of Kazakhstan |
| title_fullStr | Fractal Analysis of Air Pollution Time Series in Urban Areas in Astana, Republic of Kazakhstan |
| title_full_unstemmed | Fractal Analysis of Air Pollution Time Series in Urban Areas in Astana, Republic of Kazakhstan |
| title_short | Fractal Analysis of Air Pollution Time Series in Urban Areas in Astana, Republic of Kazakhstan |
| title_sort | fractal analysis of air pollution time series in urban areas in astana republic of kazakhstan |
| topic | urban air pollution R/S analysis time series analysis Hurst exponent PM10 PM2.5 |
| url | https://www.mdpi.com/2413-8851/8/3/131 |
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