Estimates of air pollution mitigation with green plants and green roofs using the UFORE model |
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| Authors: | Beth Anne Currie Brad Bass |
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| Institution: | (1) Centre for Social Innovation, 215 Spadina Street, Suite 400, Toronto, ON, Canada, M5V 2A8;(2) Adaptation and Impacts Research Group (AIRG), Atmospheric and Climate Science Directorate (ACSD), Institute for Environmental Studies University of Toronto, 33 Willcocks Street, Suite 1016V, Toronto, ON, Canada, M5S 3E8 |
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| Abstract: | The purpose of this study was to investigate the effect of green roofs and green walls on air pollution in urban Toronto.
The research looked at the synergistic effects on air pollution mitigation of different combinations of vegetation by manipulating
quantities of trees, shrubs, green roofs and green walls in the study area. The effects of these manipulations were simulated
with the Urban Forest Effects (UFORE) model developed by the USDA Forest Service Northeastern Regional Station. While UFORE
contains several modules, Module—D quantifies the levels of air pollution for contaminants such as NO2, S02, CO, PM10 and ozone as well as hourly pollution removal rates and the economic value of pollutant removal. Six vegetation scenarios
were developed within the Toronto study area to compare different subsets of vegetation and their effect on air contaminants.
Results of the study indicate that grass on roofs (extensive green roofs) could augment the effect of trees and shrubs in
air pollution mitigation, placing shrubs on a roof (intensive green roofs) would have a more significant impact. By extension,
a 10–20% increase in the surface area for green roofs on downtown buildings would contribute significantly to the social,
financial and environmental health of all citizens.
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| Keywords: | Green roof Air quality Air contaminants Trees Shrubs UFORE Model Urban Planning Smart growth Benefits Density |
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