Pollution attenuation by roadside greenbelt in and around urban areas |
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| Authors: | Md Nazrul Islam Khandkar-Siddikur Rahman Md Mezbaul Bahar Md Ahsan Habib Keisuke Ando Nobuaki Hattori |
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| Institution: | 1. Department of Environmental and Occupational Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan;2. Office of Research and Development, US EPA, USA;3. Office of Transportation and Air Quality, US EPA, USA;4. Department of Radiation Oncology, William Beaumont Hospital, USA;5. Division of Atmospheric Sciences, Desert Research Institute, USA;1. Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY, USA;2. U.S. Environmental Protection Agency, Office of Research and Development, Research Triangle Park, NC, USA;3. U.S. Environmental Protection Agency, Office of Transportation and Air Quality, Ann Arbor, MI, USA;4. Jacobs Technologies, 109 TW Alexander Drive, Durham, NC 27713, USA |
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| Abstract: | Greenbelts are effective tools for mitigation of traffic induced air and noise pollution. In this study, the potential role of greenbelts along the roadside for the reduction of air pollution and noise levels has been assessed by using seasonally monitored data in a megacity of Bangladesh. Correlation analysis was performed between the vegetation status, measured by canopy density and shelterbelt porosity, and the total suspended particles (TSP) removal percentage. Further, the reduction of noise level was also analyzed. The results showed that the greenbelts greatly contributed to reduce TSP pollution and it was as much as 65%. Noise level reduction was also achieved up to 17 dB when compared to the open area. Moreover, TSP removal percentage was correlated to the crown density. Area having higher crown density demonstrated less air pollution and lower level of noise compared to the area having lower crown density. Greenbelt showed better performance in summer time than winter. |
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