Effect of tree cover and tree species on microclimate and pedestrian comfort in a residential district in Iran

Teshnehdel, Saeid; Akbari, Hassan; Giuseppe, Elisa Di; Brown, Robert D.

doi:10.1016/j.buildenv.2020.106899

Cited by 92 publications

(42 citation statements)

References 42 publications

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“…Many scientists emphasize the fact of the positive influence of passive scenarios on meteorological parameters. The scale of impact depends on the amount of introduced greenery [18,23,[46][47][48], the spatial arrangement of trees [49][50][51], and the species of introduced greenery [22,52]. Wu and Chen [50] conducted a study in Beijing, China.…”

Section: Discussionmentioning

confidence: 99%

Effectiveness of Tree Pattern in Street Canyons on Thermal Conditions and Human Comfort. Assessment of an Urban Renewal Project in Historical District in Lodz (Poland)

Bochenek

Klemm

2021

Atmosphere

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The implementation of adaptation strategies has become an essential activity of spatial planning departments. Passive technologies related to the introduction of natural components in the form of vegetation are used, especially in urban development plans, to mitigate the effects of climate change and thus improve the quality of citizen life. Nature-Based Solutions are of particular importance in the areas of strict city centers, where historical building structures are subject to legal protection. In this study, the authors tested the influence of high greenery on the microclimatic conditions in the areas of typical street canyons (east–west and north–south orientations). Authors included the established greenery strategy by the City Planning Department. To estimate the impact of the assumed scenarios, a CFD tool was used—the ENVI-met application, which is commonly used in the field of urban microclimatology. Studies have shown that the introduction of 10% of green area contributed to a maximum air temperature reduction of 0.80 °C (17:00) in an east–west-oriented canyon, 0.49 °C (10:00) in a north–south canyon. The scenarios, assumed by the City Planning Department, related to the introduction of a greater amount of greenery turned out to be a less effective solution. The impact of greenery on the thermal comfort felt by humans was also determined. The reduction in the PET index was a maximum of 10.80 °C (14:00) in an east–west canyon; 6.66 °C (14:00) in a canyon area with a north–south orientation. This research might constitute the foundations to a re-evaluation of the urban development plans. The outcomes can lead to taking alternative direction of city layout transformations.

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Section: Discussionmentioning

confidence: 99%

Effectiveness of Tree Pattern in Street Canyons on Thermal Conditions and Human Comfort. Assessment of an Urban Renewal Project in Historical District in Lodz (Poland)

Bochenek

Klemm

2021

Atmosphere

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“…Among them, the human comfort index of Phyllostachys edulis forest and subtropical evergreen broad-leaved forest were most comfortable in summer, while Liquidambar formosana forest, Cunninghamia lanceolata forest and coniferous and broad-leaved mixed forest are done best in autumn. Most researchers manifested that different microclimate elements had various influences on the human comfort index, among which air temperature had the greatest impact on the human comfort index [24,53,54]. The attitude of Phyllostachys edulis forest and subtropical evergreen broad-leaved forest was approximately 800 m, which cold in winter and cool in summer.…”

Section: Characteristics Of Human Comfort Index Differences In Differmentioning

confidence: 99%

“…Forest microclimate advantages refer to the human body's perception of the forest environment's temperature, relative humidity, wind speed and other factors, which is often measured by a human comfort index. The potential of the forest microclimate environment in regulating temperature is widely known, which is conducive to human leisure and healthcare [23,24]. At the same time, evaluation of the human comfort index is one of the bases of the construction of the scientific human settlement environment.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Evaluation of Healthcare Benefits of Different Forest Types: A Case Study in Shimen National Forest Park, China

Zhu

et al. 2021

Forests

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Studies have shown that contact with nature plays a crucial role in the amelioration of human health. Forest therapy has recently received widespread attention as a novel and subsidiary treatment approach for stress recovery and health promotion. However, there is a lack of ample research on the comprehensive evaluation of the forest healthcare benefits. Moreover, it is not entirely clear what kind of forest types and seasons are suitable for forest therapy activities and how healthcare forests should be constructed and managed. From September 2019 to January 2020 and May to August 2020., five forest types of Phyllostachys edulis forest, subtropical evergreen broad-leaved forest, Liquidambar formosana forest, Cunninghamia lanceolata forest, coniferous and broad-leaved mixed forest and a forestless control group in Shimen National Forest Park, Guangzhou City, Guangdong Province, China were selected. Variations in the character of negative air ion concentration, air oxygen content, human comfort index and phytoncide relative content were analyzed. Principal component analysis and systematic clustering were used to construct forest comprehensive healthcare index and evaluation grade in order to assess the healthcare benefits of different forest types. In terms of negative air ion concentration, the subtropical evergreen broad-leaved forest was far ahead of the other forest types throughout the year, while the forestless control group was the worst. All stands reached the annual maximum in summer, followed by spring, autumn and winter. From the perspective of air oxygen content, summer > spring > autumn > winter, among them, all forest stands clearly exceeded the normal atmospheric oxygen content (20.9%) in the first three quarters. Moreover, the air oxygen content of coniferous and broad-leaved mixed forest was the highest in five forest types; the forestless control group was the lowest. Judging from the human comfort index, in the whole year, all forest types, including the forestless group, were at the comfortable level and above. However, the five forest types still differed greatly in diverse seasons, among which Phyllostachys edulis forest and subtropical evergreen broad-leaved forest were superior to Liquidambar formosana forest, Cunninghamia lanceolata forest, coniferous and broad-leaved mixed forest in spring and summer, while it was in reverse in autumn and winter. In view of the phytoncide relative content, the subtropical evergreen broad-leaved forest was the highest, followed by the Cunninghamia lanceolata forest. The relative content of phytoncide was released more in summer, second, by spring, autumn and winter. Furthermore, establishing forest comprehensive healthcare index (FCHI = 0.1NAICi + 0.35AOCi + 0.27HCIi + 0.28PRCi), according to the FCHI value, it was divided into five rating levels. Overall, the comprehensive healthcare index of the five forest stands distinctly outperformed the forestless control group in all seasons. In addition, the five forest types were at level I in spring and summer. From the comprehensive data of the whole year, the comprehensive healthcare index of the coniferous and broad-leaved mixed forest was the best, followed by the subtropical evergreen broad-leaved forest. The forest environment has a favorable influence on the human body and mind, so it is suggested that citizens go to the forest environment regularly for healthcare and physical and mental washing. In terms of the forest healthcare benefits, the best seasons for forest therapy in Shimen National Forest Park are spring and summer; autumn is suitable as well. When planning and constructing the forest therapy bases in Shimen National Forest Park in the future, coniferous and broad-leaved mixed forests should be allocated more in the stand transformation to promote forest healthcare benefits. Protecting and developing the landscape resources of the subtropical evergreen broad-leaved forests should be paid close attention, as well as making rational use of their health activity space.

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“…Mapping tree distributions of allergenic plants in urbanized landscapes is of high importance to evaluate their impact on micro-climate, air-quality and human health (Battisti, Pille, Wachtel, Larcher, & Säumel, 2019;Ottosen, Petch, Hanson, & Skjøth, 2020). By providing shade and reducing radiant temperatures, trees can mitigate the urban heat-island effect (Hamdi et al, 2020;Oke, 1982) and improve the thermal comfort of humans (Lee, Mayer, & Chen, 2016;Teshnehdel, Akbari, Di Giuseppe, & Brown, 2020). In addition, urban trees and peri-urban forests can improve air quality through trapping of particulate matter on the leaf surface and by absorbing gaseous pollutants (Baumgardner, Varela, Escobedo, Chacalo, & Ochoa, 2012;Grote et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Mapping abundance distributions of allergenic tree species in urbanized landscapes: A nation-wide study for Belgium using forest inventory and citizen science data

Dujardin

Stas

Eupen

et al. 2022

Landscape and Urban Planning

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Effect of tree cover and tree species on microclimate and pedestrian comfort in a residential district in Iran

Cited by 92 publications

References 42 publications

Effectiveness of Tree Pattern in Street Canyons on Thermal Conditions and Human Comfort. Assessment of an Urban Renewal Project in Historical District in Lodz (Poland)

Effectiveness of Tree Pattern in Street Canyons on Thermal Conditions and Human Comfort. Assessment of an Urban Renewal Project in Historical District in Lodz (Poland)

Comprehensive Evaluation of Healthcare Benefits of Different Forest Types: A Case Study in Shimen National Forest Park, China

Mapping abundance distributions of allergenic tree species in urbanized landscapes: A nation-wide study for Belgium using forest inventory and citizen science data

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