Assessing the efficacy of green walls versus street green lanes in mitigating air pollution: A critical evaluation

IF 5.4 Q1 ENVIRONMENTAL SCIENCES
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引用次数: 0

Abstract

Urban green spaces, particularly street trees and greenways, are increasingly recognized as tools for mitigating air pollution. However, their effectiveness can vary depending on their configuration and urban canyon geometry. This study, aimed at providing practical solutions, assessed the impact of different green space configurations, including street trees, green lanes, green walls, and hedges, on particulate matter (PM) concentrations within urban canyons of varying aspect ratios by employing environmental simulations and wind tunnel tests performed in ENVI-met software.

Results demonstrate that green walls significantly outperform street trees in reducing PM concentrations by up to 43%, attributing this to reduced air flow disruption. Green walls also create a more uniform PM distribution within canyons, decreasing concentration differences by 31% compared to green (tree) lanes. Conversely, dense tree lanes exacerbate PM deposition due to wind flow interference.

These findings suggest that incorporating green walls into urban design can be a highly effective strategy for improving air quality within densely built environments.

评估绿墙与街道绿道在缓解空气污染方面的功效:批判性评估
城市绿地,尤其是行道树和绿道,越来越被认为是缓解空气污染的工具。然而,绿地的效果可能因其配置和城市峡谷的几何形状而有所不同。本研究旨在提供实用的解决方案,通过使用 ENVI-met 软件进行环境模拟和风洞试验,评估了不同绿地配置(包括行道树、绿道、绿墙和绿篱)对不同长宽比的城市峡谷内颗粒物(PM)浓度的影响。绿墙还能在峡谷内形成更均匀的可吸入颗粒物分布,与绿色(树)车道相比,浓度差异减少了 31%。这些研究结果表明,在城市设计中加入绿墙是改善建筑密集环境中空气质量的一种非常有效的策略。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Environmental and Sustainability Indicators
Environmental and Sustainability Indicators Environmental Science-Environmental Science (miscellaneous)
CiteScore
7.80
自引率
2.30%
发文量
49
审稿时长
57 days
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