Conditions Affecting Wind-Induced PM10 Resuspension as a Persistent Source of Pollution for the Future City Environment

Jakub Linda, Jiří Pospíšil, Klaudia Köbölová, Roman Ličbinský, Jiří Huzlík and Jan Karel
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Jakub Linda: Faculty of Mechanical Engineering, Brno University of Technology, 61669 Brno, Czech Republic
Jiří Pospíšil: Faculty of Mechanical Engineering, Brno University of Technology, 61669 Brno, Czech Republic
Klaudia Köbölová: Faculty of Mechanical Engineering, Brno University of Technology, 61669 Brno, Czech Republic
Roman Ličbinský: Transport and Environment Department, Division of Sustainable Transport and Road Structures Diagnostics, Transport Research Centre, 63600 Brno, Czech Republic
Jiří Huzlík: Transport and Environment Department, Division of Sustainable Transport and Road Structures Diagnostics, Transport Research Centre, 63600 Brno, Czech Republic
Jan Karel: ATEM—Ateliér Ekologických Modelů s.r.o. Roztylská 1860/1, 14800 Praha, Czech Republic

Sustainability, 2022, vol. 14, issue 15, 1-12

Abstract: Air pollution by particulate matter (PM) in cities is an ongoing problem with increasing severity. The biggest PM contributors are traffic and domestic fire burning. With the shift towards electromobility and the use of low-emission fuels, attention should be shifted to less mentioned sources of pollution. Such sources of pollution include wind-induced resuspension. This study focuses on determining the threshold wind speed causing the resuspension of particulate matter (TWSR) with aerodynamic diameter smaller than 10 µm. A methodology is introduced that examines how data could be treated to identify its characteristics (for locations where only PM 10 data are available). The most significant monitored parameters are air humidity, wind direction, time of the day, and surface type. The characteristic wind speeds causing resuspension are identified in four locations for different times of day. It was proven that at times of intense human activity, particles are lifted by wind more easily. The mean threshold wind speed causing resuspension in the studied urban environment was identified as 1.58 m/s at a height of 2 m above the surface. The wind speeds were also compared with experimental studies of resuspension. The results proved correspondence between the identified wind speeds and the experimental results.

Keywords: particle re-entrainment; urban air pollution; traffic intensity; measurement processing; characteristic flow velocity (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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