Wind corridor planning and management strategies using cold air characteristics: The application in Korean cities

Son, Jeong-Min; Eum, Jeong-Hee; Kim, Soo-Bong

doi:10.1016/j.scs.2021.103512

Cited by 16 publications

(7 citation statements)

References 29 publications

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“…The analysis showed that a combination of factors, such as elevation, BH, WAI, and BA, should be considered. The preceding research has mainly focused on the formation and movement of CAF due to natural factors [24,[32][33][34]. However, this study has a significant advantage in focusing on the movement of CAF and temperature reduction caused by physical factors in urban spaces.…”

Section: Discussionmentioning

confidence: 99%

Analysis of Spatial Characteristics Contributing to Urban Cold Air Flow

Kim,

Oh,

Yoo

2023

Land

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To mitigate the urban heat island phenomenon at night, cool, fresh air can be introduced into the city to circulate and dissipate the heat absorbed during the day, thereby reducing high urban air temperatures. In other words, cold air flow (CAF) generated by mountainous and green areas should be introduced to as wide an area as possible within the city. To this end, it is necessary to first understand the characteristics of urban spatial factors that impact CAF, and to conduct concrete and quantitative analyses of how these urban spatial characteristics are contributing to air temperature reduction. In this study, the following are conducted: (1) an analysis of the relationship between cold air volume flux (CAVF) and the amount of air temperature reduction; (2) urban spatial categorization; (3) an analysis of the relationship between CAVF and the amount of air temperature reduction by urban spatial type; (4) a regression analysis between the amount of air temperature reduction and urban spatial characteristic factors that affect CAF; and finally, (5) the use of CAF to reduce urban air temperatures in urban planning and a design is proposed. Urban space was categorized into nine types using the results of the tertile analysis of CAVF and urban temperature reduction. It was determined that building height (BH) has a positive (+) influence on all urban spatial types, while building area ratio (BA) has a negative (−) effect. However, in the case of wall area index (WAI), the direction of influence varied depending on the development density; relatively low BA areas should focus on development that increases height to increase WAI, while relatively high BA areas should focus on development that reduces BA to reduce WAI by targeting development types closer to the tower type. And even in areas with similar development density, influence varies depending on the terrain elevation. Moreover, it is necessary to prepare improvement measures to increase the factors with CAF that positively influence air temperature reduction and decrease those with negative influence according to the characteristics of urban spatial types. Such results quantitatively and specifically confirmed the effects of spatial factors that affect CAF by urban spatial type on air temperature reduction. The results of this study can be used as useful information for the efficient use of CAF, a major element of urban ecosystem services.

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Section: Discussionmentioning

confidence: 99%

Analysis of Spatial Characteristics Contributing to Urban Cold Air Flow

Kim,

Oh,

Yoo

2023

Land

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“…The green quantity is an important index that comprehensively reflects the vegetation leaf area index, vegetation coverage, and vegetation structure. It is considered to be an important parameter for measuring the ecological benefits and greening level of different spaces in cities and has significant effects for cooling, humidifying, and improving the urban microclimate [15]. It is calculated as follows: S = 1/(1/30 000 + 0.000 2 × 0.03NDVI)…”

Section: Levelsmentioning

confidence: 99%

Multi-Scale Urban Natural Ventilation Climate Guidance: A Case Study in the Shijiazhuang Metropolitan Area

Zhang,

Fang,

Cheng

et al. 2024

Atmosphere

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The rapid development of urbanization has caused obstructed urban natural ventilation and the contribution rate of urbanization is relatively high. Therefore, there is an urgent need for urban development planning that should respect natural ventilation and local climate to reduce negative impacts. By optimizing the urban construction layout to reduce obstruction and leave a passageway for wind to blow in, the natural ventilation environment could be improved. This paper presents a promising approach for natural ventilation planning at both the city and community scales. Based on the assessment of wind environment, heat island intensity, and ventilation potential, the results revealed that winds blowing from the western and northern mountainous area of Shijiazhuang play a natural ventilation inlet role which can provide clean air. The SSHI and SHI were mainly distributed within the Second Ring Road, which has a large proportion of the low ventilation potential level. Thus, six first-class ventilation corridors and thirteen secondary corridors were recommended, which were set to be adapted to the dominant wind direction. Subsequently, an urban climate analysis map (UCAnMap) was developed considering climate sensitivity, and planning recommendations were provided for different climate zones. The relationship between architectural spatial structure and ventilation efficiency was analyzed; the results revealed that increasing the height of the buildings will decrease the proportion of comfortable wind zones, and the overall ventilation efficiency will weaken, so the average building height of a typical block should be controlled within 45 m, which matches ventilation performance requirements. The ventilation efficiency of the block has a certain negative correlation with the building density, and as the building density decreased by more than 10%, the proportion of the comfortable wind zones could increase by 4–5%.

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“…In light of these trends, the concepts of climate-responsive design and urban wind corridor planning have aroused increasing interest and discussion among related academia and professionals [7][8][9][10]. With the urban heat island effect becoming increasingly serious in many cities, using the urban wind corridor effect to foster urban cooling and alleviate the impact of the heat island effect has become an important research topic in urban planning and design [11][12][13][14][15]. It is also becoming a popular policy goal for many city governments [16,17].…”

Section: Introductionmentioning

confidence: 99%

“…Urban wind corridors can result from roads, open spaces, and passages through which air reaches the interiors of urbanized areas [45]. Wind passing from rural or urban fringe areas into a city provides cleaner and cooler air to urban canopy layers in summers, which has been noted as one of the possible measures to mitigate the impact of the heat island effect [12,14,46,47]. Good ventilation not only helps eliminate pollutants but also reduces temperature and improves outdoor human comfort [48][49][50].…”

Section: Introductionmentioning

confidence: 99%

Make Way for the Wind—Promoting Urban Wind Corridor Planning by Integrating RS, GIS, and CFD in Urban Planning and Design to Mitigate the Heat Island Effect

Wu,

Shan

2024

Atmosphere

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Under the trend in climate change, global warming, and the increasingly serious urban heat island effect, promoting urban wind corridor planning to reduce urban temperature and mitigate the effect of urban heat islands has received widespread attention in many cities. With emerging awareness of the need to explicitly incorporate climate considerations into urban planning and design, integrating current spatial analysis and simulation tools to enhance urban wind corridor planning to obtain the best urban ventilation effect has become an increasingly important research topic in green city development. However, how to systematically carry out urban wind corridor planning by employing related technology and simulation tools is a topic that needs to be explored urgently in both theory and practice. Taking Zhumadian City in China as an example, this study proposes a method and planning approach that uses remote sensing (RS), geographic information system (GIS), and computational fluid dynamics (CFD) in an integrated way to understand urban landscape and to conduct urban wind corridor planning. The research results reveal that the urban form of Zhumadian City favors the development of urban wind corridors, and that the railway lines and some major roads in the city have the potential to be developed as the city’s main wind corridors. However, there are still ventilation barriers resulting from the existing land use model and building layout patterns that need to be adjusted. In terms of local-level analysis, the CFD simulation analysis also reveals that some common building layout patterns may result in environments with poor ventilation. Finally, based on the results of our empirical analysis and local planning environment, specific suggestions are provided on how to develop appropriate strategies for urban wind corridor planning and adjustments related to land use planning and building layout patterns in order to mitigate the impact of the urban heat island effect.

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Wind corridor planning and management strategies using cold air characteristics: The application in Korean cities

Cited by 16 publications

References 29 publications

Analysis of Spatial Characteristics Contributing to Urban Cold Air Flow

Analysis of Spatial Characteristics Contributing to Urban Cold Air Flow

Multi-Scale Urban Natural Ventilation Climate Guidance: A Case Study in the Shijiazhuang Metropolitan Area

Make Way for the Wind—Promoting Urban Wind Corridor Planning by Integrating RS, GIS, and CFD in Urban Planning and Design to Mitigate the Heat Island Effect

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