Effect of tree location on mitigating parking lot insolation

Bajšanski, Ivana; Stojaković, Vesna; Jovanović, Mladjen

doi:10.1016/j.compenvurbsys.2015.11.006

“…Vegetation canopies cool the environment by providing shade and by transpiration of water through leaves [30]; evapotranspiration can transform a large portion of incoming solar radiation to the surface, which otherwise contributes to the underground heat storage, into latent heat, and makes the ground surface cooler [31]. Increasing the vegetation land cover could considerably reduce surface temperatures [32]; trees of a height of 5-10 m or thick hedges of a height of 1.5 m help to control the overheating of surfaces in buildings [33]; green areas reduce airconditioning energy use and avoid carbon emission [34]. The cooling extent of a green area is also In the sense of urban metabolism at both sites, there are no key elements (population density is low and so the number of elements influencing the metabolism is also low) that would affect overheating or any other parameters.…”

Section: Green Areasmentioning

confidence: 99%

The Impact of Morphological Features on Summer Temperature Variations on the Example of Two Residential Neighborhoods in Ljubljana, Slovenia

Fikfak

¹

,

Kosanović

²

,

Konjar

³

et al. 2017

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Abstract:The study conducted in this paper is focused on a predominantly residential area of the City of Ljubljana-Koseze, which is characterized by generally favorable (bio)climatic conditions. Nonetheless, thermal satellite images showed that residential neighborhoods within the Koseze district display unexpected variations in summer temperatures. This observation called into question the benefits of existing bioclimatic features and indicated the need to investigate and compare two neighborhoods with similar urban parameters, with the aim to identify morphological differential characteristics impacting urban heat island (UHI) intensity. By applying the study methodology based on a literature review, surveys of key precedents, detailed mapping in two Koseze locations, in situ measurements, observations and recordings, thermal imagery, and the analyses of statistical data, as well as by defining the four main categories of morphological urban parameters-structure, cover, fabric and metabolism, it was concluded that both neighborhoods have common morphological elements mitigating the UHI effect. Additionally, it was found that the neighborhood with higher UHI intensity has several less favorable features, such as busier roads, larger surface of parking corridors, and the existence of underground parking space. The traffic as an element of urban morphology hence represents the main cause of differences among UHI levels in the two Koseze neighborhoods.

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“…Currently, computer numerical simulation approaches, such as computational fluid dynamics (CFD), are used to analyze urban ventilation environments (Ding, Lam, and Feng 2017;Lyu, Buccolieri, and Gao 2015). Specifically, the wind pressure and velocity in both summer and winter are analyzed according to the urban planning and design scheme to provide feedback on the wind environment (Bajsanski, Stojakovic, and Jovanovic 2016;Guo, Liu, and Yuan 2015;Hsieh and Huang 2016;Ramponi et al 2015). However, this widely used method has several drawbacks.…”

Section: Introductionmentioning

confidence: 99%

Spatial planning for urban ventilation corridors by urban climatology

Gu

¹

,

Fang

²

,

Zhao

³

et al. 2020

Ecosyst Health Sustain

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Ventilation corridors in cities can decrease air pollution and alleviate heat island problems but there remains a need to fully assess their effectiveness. Few urban managers have been able to take city-scale approaches to the construction of urban ventilation corridors. This study aimed to introduced the Ventilation Corridor Planning (VCP) model, which is a multi-criteria evaluation method combined with a geographical information system (GIS) to determine where the ventilated environment is most appropriate. Specifically, the VCP model took Bozhou, China as the research object and contained two scales, including mesoscale and local scale. In mesoscale scale, we got three outputs to build urban ventilation corridors, including 1) background wind environment, 2) ventilation potential, 3) heat island intensity. In local scale, we used traditional computational fluid dynamics (CFD) model to verify the impact of VCP criteria. The results revealed that compared with the traditional CFD model, the proposed VCP model has advantages in establishing a comprehensive evaluation standard. In addition, the application of VCP model in macro and micro also enhances the efficiency of ventilation corridor construction. Overall, this study introduced a effective modeling method to urban ventilation corridors planning, and provide a way to study the urban climate.

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“…Vegetation canopies cool the environment by providing shade and by transpiration of water through leaves [30]; evapotranspiration can transform a large portion of incoming solar radiation to the surface, which otherwise contributes to the underground heat storage, into latent heat, and makes the ground surface cooler [31]. Increasing the vegetation land cover could considerably reduce surface temperatures [32]; trees of a height of 5-10 m or thick hedges of a height of 1.5 m help to control the overheating of surfaces in buildings [33]; green areas reduce airconditioning energy use and avoid carbon emission [34]. The cooling extent of a green area is also affected by the features of its surrounding areas, such as the density of buildings, the height/weight ratio, direction of streets, and the existence of plants [34].…”

Section: Green Areasmentioning

confidence: 99%

The Impact of Morphological Features on Summer Temperature Variations on the Example of two Residential Neighborhoods in Ljubljana, Slovenia

Fikfak¹,

Kosanović²,

Konjar³

et al. 2017

Preprint

6

0

View full text Add to dashboard Cite

Abstract:The study conducted in this paper is focused on a predominantly residential area of the City of Ljubljana-Koseze, which is characterized by generally favorable (bio)climatic conditions. Nonetheless, thermal satellite images showed that residential neighborhoods within the Koseze district display unexpected variations in summer temperatures. This observation called into question the benefits of existing bioclimatic features and indicated the need to investigate and compare two neighborhoods with similar urban parameters, with the aim to identify morphological differential characteristics impacting urban heat island (UHI) intensity. By applying the study methodology based on a literature review, surveys of key precedents, detailed mapping in two Koseze locations, in situ measurements, observations and recordings, thermal imagery, and the analyses of statistical data, as well as by defining the four main categories of morphological urban parameters-structure, cover, fabric and metabolism, it was concluded that both neighborhoods have common morphological elements mitigating the UHI effect. Additionally, it was found that the neighborhood with higher UHI intensity has several less favorable features, such as busier roads, larger surface of parking corridors, and the existence of underground parking space. The traffic as an element of urban morphology hence represents the main cause of differences among UHI levels in the two Koseze neighborhoods.

show abstract

Effect of tree location on mitigating parking lot insolation

Cited by 39 publications

References 23 publications

The Impact of Morphological Features on Summer Temperature Variations on the Example of Two Residential Neighborhoods in Ljubljana, Slovenia

The Impact of Morphological Features on Summer Temperature Variations on the Example of Two Residential Neighborhoods in Ljubljana, Slovenia

Spatial planning for urban ventilation corridors by urban climatology

The Impact of Morphological Features on Summer Temperature Variations on the Example of two Residential Neighborhoods in Ljubljana, Slovenia

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