Investigation of Pollution Dispersion in Urban Canyons Using an Approach of wind Direction and Trees Position (Case study: Urban Texture in Isfahan)

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HOSSEINI S.HOSSEIN; Bakhtiari Pouya; NASROLLAHI NAZANIN

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Journal: JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY Year:2019 | Volume:21 | Issue:2 (81) Page(s): 241-254

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Title

Investigation of Pollution Dispersion in Urban Canyons Using an Approach of wind Direction and Trees Position (Case study: Urban Texture in Isfahan)

Author(s)

HOSSEINI S.HOSSEIN | Bakhtiari Pouya | NASROLLAHI NAZANIN | Issue Writer Certificate

Keywords

PollutionQ2

Urban CanyonsQ1

TreesQ1

Ratio of Height to WidthQ1

Direction of WindQ1

CFD SimulationQ1

Abstract

Background and Objective: Vegetation that is commonly used in urban design has a significant impact on air quality in the Urban Canyons. Thus, planners should be aware of vegetation impacts. In Isfahan metropolis, though vegetation covers a considerable portion of the city, the streets are encountered with Pollution problems. In this study, distribution of Pollution in Urban Canyons is evaluated using an optimal model for Pollution reduction. Method: A three-dimensional modeling software called ENVI-met along with local and sub-climatic air quality model based on CFD-computational fluid dynamics-is used to study the influence of vegetation on Pollution level in Urban Canyons. In this study, first a sample of real field and next a simpler version of the selected area are simulated. Findings: Different parameters such as height to width ratio in Urban Canyons, density of Trees, location of Trees in the streets and gaps between the Trees are evaluated. Conclusion: The obtained results show that the increase of wind velocity in the shallow valleys is at the the lower level and the absence of natural obstacles such as Trees reduces the level of Pollution due to the high velocity of wind at this condition. When Trees are located in the center of Urban Canyons, Pollution and tree distances are inversely correlated and Pollution level reduces by increasing the distance between the Trees. In the other words, the Pollution that is caught by the tree canopies decreases with the reduction in tree canopies.

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APA: Copy

HOSSEINI, S.HOSSEIN, Bakhtiari, Pouya, & NASROLLAHI, NAZANIN. (2019). Investigation of Pollution Dispersion in Urban Canyons Using an Approach of wind Direction and Trees Position (Case study: Urban Texture in Isfahan). JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY, 21(2 (81) ), 241-254. SID. https://sid.ir/paper/362851/en

Vancouver: Copy

HOSSEINI S.HOSSEIN, Bakhtiari Pouya, NASROLLAHI NAZANIN. Investigation of Pollution Dispersion in Urban Canyons Using an Approach of wind Direction and Trees Position (Case study: Urban Texture in Isfahan). JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY[Internet]. 2019;21(2 (81) ):241-254. Available from: https://sid.ir/paper/362851/en

IEEE: Copy

S.HOSSEIN HOSSEINI, Pouya Bakhtiari, and NAZANIN NASROLLAHI, “Investigation of Pollution Dispersion in Urban Canyons Using an Approach of wind Direction and Trees Position (Case study: Urban Texture in Isfahan),” JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY, vol. 21, no. 2 (81) , pp. 241–254, 2019, [Online]. Available: https://sid.ir/paper/362851/en

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