有效的街道树木和草地设计为欧洲社区降温

IF 6 2区 工程技术 Q1 ENVIRONMENTAL SCIENCES
Yehan Wu , Bardia Mashhoodi , Agnès Patuano
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引用次数: 0

摘要

街道上的树木和草地是城市降温的重要元素,但在社区尺度上,在哪里以及如何分布它们仍然不清楚。本研究旨在确定有效的街道树木和草地设计方案,以最大限度地提高欧洲温带社区的降温效果。通过结合四种社区类型的植被类型、覆盖范围和空间分布的城市设计参数,开发了32个设计场景。然后使用ENVI-met模式模拟了这些情景的小气候效应。为了评估它们的冷却效果,采用了三个指标:PET减少,热感觉等级的百分比变化和冷却效率。结果表明,即使在街道上完全覆盖草,也会使整个街区的平均生理等效温度(PET)降低1.1°C,而行道树则会使PET降低8.7°C。具有宽放射状街道的社区具有更高的初始PET值,并且从绿色干预中获益更多。策略性地在主要街道上种植两排大树,比在辐射高的主干道和次要街道上同时种植一排大树更有效。本文就策略性地在街道上种植树木和草地,提供了针对邻近地区的实用建议,以改善城市降温。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effective street tree and grass designs to cool European neighbourhoods
Street trees and grass are important elements for cooling cities, yet where and how to distribute them at the neighbourhood scale is still unclear. This study aims to identify effective street tree and grass design scenarios to maximise cooling in European neighbourhoods with temperate climate. 32 design scenarios were developed by combining urban design parameters of vegetation type, coverage, and spatial distribution in four neighbourhood typologies. The microclimate effects of these scenarios were then simulated using the ENVI-met model. To evaluate their cooling effects, three indices were applied: PET reduction, percentage change in thermal sensation class, and cooling efficiency. Results reveal that even fully covering streets with grass has a marginal thermal impact in reducing the mean Physiological Equivalent Temperature (PET) by up to 1.1 °C across the neighbourhood, while street trees lower PET by up to 8.7 °C. Neighbourhoods with wide radial streets have higher initial PET values and benefit more from green interventions. Strategically placing two rows of large trees on main streets is more effective for cooling than a single row on both main and secondary streets on the high-radiation side. Neighbourhood-specific practical recommendations for strategically implementing street trees and grass are provided to improve urban cooling.
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来源期刊
Urban Climate
Urban Climate Social Sciences-Urban Studies
CiteScore
9.70
自引率
9.40%
发文量
286
期刊介绍: Urban Climate serves the scientific and decision making communities with the publication of research on theory, science and applications relevant to understanding urban climatic conditions and change in relation to their geography and to demographic, socioeconomic, institutional, technological and environmental dynamics and global change. Targeted towards both disciplinary and interdisciplinary audiences, this journal publishes original research papers, comprehensive review articles, book reviews, and short communications on topics including, but not limited to, the following: Urban meteorology and climate[...] Urban environmental pollution[...] Adaptation to global change[...] Urban economic and social issues[...] Research Approaches[...]
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