The effect of landscape configuration on outdoor thermal environment: A case of urban Plaza in Xi'an, China

Yu, Haiming; Zhang, Tao; Fukuda, Hiroatsu; Ma, Xuan

doi:10.1016/j.buildenv.2023.110027

Cited by 20 publications

(9 citation statements)

References 56 publications

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“…The agreement index (d), which determines the accuracy of the data, was 0.99 (Figure 3a), indicating that the data is reliable as it is close to 1. The root mean square error (RMSE) is an indicator used to measure the inconsistency between the values estimated by the model and the actual observed values (Yu et al, 2023). The result of 0.7323 obtained in the study indicates the accuracy of the analysis, as the value is small, indicating that the model simulation is accurate (Figure 3a).…”

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confidence: 86%

“…Analysis of ENVI-met Proposed Scenarios: Different landscape design scenarios were analyzed to provide outdoor thermal comfort in all seasons for urban residents to spend time in outdoor spaces. Studies in this field have shown that when landscape designs are created in harmony with the natural structure of the area, thermal comfort in the space can be improved (Jamei and Rajagopalan, 2017;Morakinyo et al, 2019;Yucekaya and Uslu, 2020;Lai et al, 2022;Okumuş and Terzi, 2022;Yu et al, 2023). It has been determined that the right decisions regarding land use can be taken with the right planning (Şatır and Berberoğlu, 2021).…”

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confidence: 99%

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ENVI-met Simulations of the Effect of Different Landscape Design Scenarios on Pedestrian Thermal Comfort: Haydar Aliyev Street

YILMAZ,

KURT,

GÖLCÜ

2023

Yüzüncü Yıl Üniversitesi Tarım Bilimleri Dergisi

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In the city of Erzurum, located in a cold climate region, it is important for pedestrian walkways and parks to be usable all year round. Haydar Aliyev Street, located on the city's new development axis, serves as both a pedestrian route and a park. Meteorological data was collected hourly throughout 2021 using a Vantage Pro 2 Plus device installed at a height of 1.5 m in the study area. The scenarios were analyzed using the ENVI-met BIO+ Science Software, with August (summer) and January (winter) identified as the hottest and coldest months, respectively. Sky View Factor (SVF) analysis was conducted using fisheye lens photos taken from different points in the area. Four different landscape design scenarios were created for the study area, consisting of plants, water surfaces, soil, and grass. It was found that the temperature decreased by an average of 0.2°C in the summer scenario when the number of plants was increased by 20%. Furthermore, it was determined that the deciduous tree scenario provided better thermal comfort compared to the treeless soil scenario for a pedestrian-friendly park during the winter months. The inactive water scenario for summer and winter was found to increase wind speed by a maximum of 1.3 m s-1. The study concluded that different landscape design scenarios had an impact on outdoor thermal comfort and that further research was needed in this area. Such studies highlight the need for multidisciplinary teamwork to create healthy, sustainable, and livable urban environments in designing thermal-comfortable spaces.

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confidence: 86%

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confidence: 99%

ENVI-met Simulations of the Effect of Different Landscape Design Scenarios on Pedestrian Thermal Comfort: Haydar Aliyev Street

YILMAZ,

KURT,

GÖLCÜ

2023

Yüzüncü Yıl Üniversitesi Tarım Bilimleri Dergisi

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“…Small orchards and small bamboo gardens can also be added to squares to improve thermal comfort. Small orchards and bamboo gardens can be created by planting different types of plants to increase the shaded area and, thus, reduce the local Ta [51][52][53][54][55][56]. Small vegetable gardens, small gardens, and small tea gardens have low-growing plants that provide a degree of evaporating moisture, reducing the PET value of outdoor spaces [57][58][59].…”

Section: Creation Of Outdoor "Micro-landscapes" To Improve Thermal Co...mentioning

confidence: 99%

Thermal Comfort Improvement Strategies for Outdoor Spaces in Traditional Villages Based on ENVI-Met: Shimengao Village in Chizhou City

Xiao,

Sheng,

Zhang

et al. 2023

Sustainability

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The thermal comfort of outdoor spaces in traditional villages must be improved because high building density combined with complex and narrow spaces leads to a poor thermal environment. In traditional villages, outdoor spaces are the most frequently used places by local residents and tourists. In this study, the Shimengao Village in Tangxi Town, Chizhou City, a typical mountainous area in the southern Anhui Province, was selected as the research object, and Depthmap software was used to identify the most frequently used outdoor spaces. The spatial layout and three different outdoor spaces of the traditional village were measured and validated using ENVI-met software. In addition, the distribution of thermal comfort in the core area of the village and influencing factors were analyzed. Our results demonstrated that during summer, PET reached its highest value at 15:00, exhibiting a poor thermal environment in the core area of traditional village integration. From 15:00 to 21:00, PET values declined, resulting in improved thermal comfort levels. Open spaces had better thermal comfort ratings throughout the day. The thermal comfort distribution of three different types of outdoor space in traditional villages was also analyzed. The courtyard space had the worst thermal comfort, followed by the street space, whereas the square space had the best thermal comfort environment. This was correlated with the spatial layout of traditional villages, external facilities of buildings, microlandscapes (plants, water availability, etc.), and outdoor ground materials. Hence, we propose that optimizing the overall spatial layout of a traditional village, increasing the external facilities of buildings, creating “micro landscapes,” and optimizing the materials of outdoor spaces are important for improving the thermal comfort of the outdoor spaces of traditional villages.

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“…Thermally relevant indicators, beyond merely temperature, are necessary to assess the impact of urban street trees on human well-being [35]. For example, recent work in Xi'an, China, used physiological equivalent temperature (PET) to assess the impact of green spaces on human thermal comfort [36]. Wang et al [37] examined how tree characteristics including crown radius and trunk height relate to PET reduction, and determined that taller trees led to lower PET values.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the effects of different tree species on enhancing outdoor thermal comfort in a post-industrial landscape

Vatani,

Kiani,

Mahdavinejad

et al. 2024

Environ. Res. Lett.

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A frequently emphasized strategy to reduce the burden of heat in cities across the world is the implementation of street trees. Here, we examine the effects of deciduous and coniferous tree deployment on meteorological variables and pedestrian themal comfort through analysis of the new dynamic thermal comfort (dPET) index, using the latest version of the computational fluid dynamics model ENVI-met. We performed on site observational measurements of air temperature (Ta), relative humidity (Rh), wind speed (Ws), and mean radiant temperature (MRT) at 5 different locations on the hottest day of summer 2023, in a post-industrial urban landscape located in Tehran, Iran. Observations were used to evaluate ENVI-met simulation performance and served as a baseline against which sensitivity experiments – based on a minimum (35%) and maximum (75%) intervention scenario for deciduous and coniferous trees – were compared against. Our analysis indicates that 35% and 75% deployment reduced Ta by 1.2°C and 4.2°C, respectively, for deciduous tree species, compared to a 0.9°C and 3.1°C reduction for coniferous species, during the hottest day of summer 2023. The maximum deployment scenario decreased MRT by approximately 60°C and 43°C for deciduous and coniferous tree deployment, respectively. The maximum tree deployment scenario decreased dPET by nearly 16°C and 14°C for deciduous and coniferous trees, respectively, during the time of day that diurnal heating is maximized. Our findings highlight micrometeorological and personalized thermal comfort effects associated with variable tree species type and extent through examination of a pedestrian's ambulatory experience across diverse urban microclimates in a region of the world that is particularly understudied.

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The effect of landscape configuration on outdoor thermal environment: A case of urban Plaza in Xi'an, China

Cited by 20 publications

References 56 publications

ENVI-met Simulations of the Effect of Different Landscape Design Scenarios on Pedestrian Thermal Comfort: Haydar Aliyev Street

ENVI-met Simulations of the Effect of Different Landscape Design Scenarios on Pedestrian Thermal Comfort: Haydar Aliyev Street

Thermal Comfort Improvement Strategies for Outdoor Spaces in Traditional Villages Based on ENVI-Met: Shimengao Village in Chizhou City

Evaluating the effects of different tree species on enhancing outdoor thermal comfort in a post-industrial landscape

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