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Air Pollution Abatement Performances of Green Infrastructure in Open Road and Built-up Street Canyon Environments – A Review

Abhijith, KV, Kumar, Prashant, Gallagher, J, McNabola, A, Baldauf, R, Pilla, F, Broderick, B, Di Sabatino, S and Pulvirenti, B (2017) Air Pollution Abatement Performances of Green Infrastructure in Open Road and Built-up Street Canyon Environments – A Review Atmospheric Environment, 162. pp. 71-86.

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Abstract

Intensifying the proportion of urban green infrastructure has been considered as one of the remedies for air pollution levels in cities, yet the impact of numerous vegetation types deployed in different built environments has to be fully synthesised and quantified. This review examined published literature on neighbourhood air quality modifications by green interventions. Studies were evaluated that discussed personal exposure to local sources of air pollution under the presence of vegetation in open road and built-up street canyon environments. Further, we critically evaluated the available literature to provide a better understanding of the interactions between vegetation and surrounding built-up environments and ascertain means of reducing local air pollution exposure using green infrastructure. The net effects of vegetation in each built-up environment are also summarised and possible recommendations for the future design of green infrastructure are proposed. In a street canyon environment, high-level vegetation canopies (trees) led to a deterioration in air quality, while low-level green infrastructure (hedges) improved air quality conditions. For open road conditions, wide, low porosity and tall vegetation leads to downwind pollutant reductions while gaps and high porosity vegetation could lead to no improvement or even deteriorated air quality. The review considers that generic recommendations can be provided for vegetation barriers in open road conditions. Green walls and roofs on building envelopes can also be used as effective air pollution abatement measures. The critical evaluation of the fundamental concepts and the amalgamation of key technical features of past studies by this review could assist urban planners to design and implement green infrastructures in the built environment.

Item Type: Article
Subjects : Civil Engineering
Divisions : Faculty of Engineering and Physical Sciences > Civil and Environmental Engineering
Authors :
NameEmailORCID
Abhijith, KVUNSPECIFIEDUNSPECIFIED
Kumar, PrashantP.Kumar@surrey.ac.ukUNSPECIFIED
Gallagher, JUNSPECIFIEDUNSPECIFIED
McNabola, AUNSPECIFIEDUNSPECIFIED
Baldauf, RUNSPECIFIEDUNSPECIFIED
Pilla, FUNSPECIFIEDUNSPECIFIED
Broderick, BUNSPECIFIEDUNSPECIFIED
Di Sabatino, SUNSPECIFIEDUNSPECIFIED
Pulvirenti, BUNSPECIFIEDUNSPECIFIED
Date : August 2017
Identification Number : 10.1016/j.atmosenv.2017.05.014
Copyright Disclaimer : © 2017 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Uncontrolled Keywords : Local pollutant exposure, Street canyons, Open roads, Urban trees and hedges, Green wall, Green roof
Depositing User : Symplectic Elements
Date Deposited : 11 May 2017 13:05
Last Modified : 27 Jul 2017 12:19
URI: http://epubs.surrey.ac.uk/id/eprint/814152

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