This page has only limited features, please log in for full access.

Prof. Dr. Bao-Jie He
University of New South Wales (UNSW) Sydney

Basic Info


Research Keywords & Expertise

0 Ventilation
0 Green Building Design
0 urban heat island
0 remote sensing and GIS applications
0 Urban climate

Fingerprints

urban heat island
Ventilation
remote sensing and GIS applications
Urban climate
urban emergency

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

The user biography is not available.
Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Research article
Published: 23 July 2021 in Advanced Sustainable Systems
Reads 0
Downloads 0

Whilst many cities have implemented strategies for urban park supply, the expected outcome may be productively poor, aggravating the inequality. However, little evidence of reducing urban park inequality through regulating urban park scale has been presented. The indicators of accessibility per capita park area, Gini coefficient, and accessible park share are adopted to assess the urban park inequality in Chongqing and examine park scale impacts, through 21 incremental scenarios. Whilst the overall urban park equity is relatively reasonable in Chongqing's core area, the park accessibility is markedly unequal in distribution. There is no significant difference between the age- and income-vulnerable groups and all residents in urban park equity. However, a highly unequal distribution of comprehensive parks, neighborhood parks, and small pleasance for all residents and vulnerable groups is observed. Moreover, urban park equity can be affected by park scale, where urban park number has a positive impact on accessible per capita park area and a negative effect on Gini coefficient, among all residents and vulnerable groups. There is no significant relationship between park number and the proportion of accessible park share of vulnerable groups. Overall, the impact of park scale is revealed on park-related equity and policy makers and planners are suggested for public health, environmental equity in urban communities.

ACS Style

Yuying Diao; Wen Hu; Bao‐Jie He. Analysis of the Impact of Park Scale on Urban Park Equity Based on 21 Incremental Scenarios in the Urban Core Area of Chongqing, China. Advanced Sustainable Systems 2021, 2100171 .

AMA Style

Yuying Diao, Wen Hu, Bao‐Jie He. Analysis of the Impact of Park Scale on Urban Park Equity Based on 21 Incremental Scenarios in the Urban Core Area of Chongqing, China. Advanced Sustainable Systems. 2021; ():2100171.

Chicago/Turabian Style

Yuying Diao; Wen Hu; Bao‐Jie He. 2021. "Analysis of the Impact of Park Scale on Urban Park Equity Based on 21 Incremental Scenarios in the Urban Core Area of Chongqing, China." Advanced Sustainable Systems , no. : 2100171.

Journal article
Published: 20 July 2021 in Environmental Impact Assessment Review
Reads 0
Downloads 0

The rapid urbanization in the Belt and Road Initiative (BRI) area has aggravated the cross-regional pollution of PM2.5 and aroused concern about the conflicts between urban development and air quality. This study aims to examine the spatial-temporal PM2.5 variations in the BRI region, in which area many countries are undergoing rapid urbanization and the main field of future urbanization, to delineate the driving mechanism of PM2.5 accumulation or dissipation. Previous studies have analyzed the PM2.5 distribution at the national level, providing limited information regarding regional heterogeneity in urbanization and PM2.5 concentrations within each country. Additionally, the regional differences in the driving mechanisms of urbanization factors on PM2.5 concentrations have not been thoroughly investigated within the BRI areas. In this study, remote sensing raster data was combined with geographic grid units to examine variations in urbanization and PM2.5 within the BRI region, identifying “typical regions” where urbanization could enhance PM2.5 accumulation. The main results are as follows: i) The spatial autocorrelation of urbanization and PM2.5 concentrations has gradually strengthened, showing consistent high-value distributions in the North China Plain, Ganges Plain and indicating a synergistic growth among emerging developing regions such as China, India, and the Persian Gulf Coast. ii) The correlation between urbanization and PM2.5 concentrations exhibited a distinct trend of differentiation within the BRI regions. The influence of urbanization on PM2.5 changed from agglomeration to dispersion, forming a “typical region” category composed of ten countries, including China, India, and Morocco. iii) The three main urbanization-related factors for PM2.5 accumulation in the “typical regions” for 2005–2016 were energy pollution emission, economic activities, and human activities. By 2023, the effects of energy pollution and economic activities are expected to converge in some “typical region” countries. Targeted urban strategies and governance actions based on the different driving-types of “typical regions” in BRI have been proposed to coordinate relationship between urban construction and atmospheric environmental protection.

ACS Style

Guoen Wei; Zhenke Zhang; Xiao Ouyang; Yang Shen; Shengnan Jiang; Binglin Liu; Bao-Jie He. Delineating the spatial-temporal variation of air pollution with urbanization in the Belt and Road Initiative area. Environmental Impact Assessment Review 2021, 91, 106646 .

AMA Style

Guoen Wei, Zhenke Zhang, Xiao Ouyang, Yang Shen, Shengnan Jiang, Binglin Liu, Bao-Jie He. Delineating the spatial-temporal variation of air pollution with urbanization in the Belt and Road Initiative area. Environmental Impact Assessment Review. 2021; 91 ():106646.

Chicago/Turabian Style

Guoen Wei; Zhenke Zhang; Xiao Ouyang; Yang Shen; Shengnan Jiang; Binglin Liu; Bao-Jie He. 2021. "Delineating the spatial-temporal variation of air pollution with urbanization in the Belt and Road Initiative area." Environmental Impact Assessment Review 91, no. : 106646.

Journal article
Published: 29 June 2021 in Science of The Total Environment
Reads 0
Downloads 0

Urbanization can lead to changes in urban morphology that alter the urban thermal environment and energy demand. Improving urban ventilation can alleviate the urban heat island effect and reduce urban energy demand. We categorized the ventilation conditions of 31 major cities in China into four levels based on the frontal area index and presented the natural ventilation effects for cities in five different climate zones. We found that the land surface temperature varies between 0.029 and 5.357 °C in areas under the same climate background. Improving ventilation can directly or indirectly contribute to reductions in urban energy consumption. The energy demand in well-ventilated areas can be reduced by up to 6.704%. The largest reduction in urban energy demand was achieved by improving ventilation within the temperate continental climate zone.

ACS Style

Jun Yang; Yichen Wang; Bing Xue; Yunfei Li; Xiangming Xiaog; Jianhong (Cecilia) Xia; Baojie He. Contribution of urban ventilation to the thermal environment and urban energy demand: Different climate background perspectives. Science of The Total Environment 2021, 795, 148791 .

AMA Style

Jun Yang, Yichen Wang, Bing Xue, Yunfei Li, Xiangming Xiaog, Jianhong (Cecilia) Xia, Baojie He. Contribution of urban ventilation to the thermal environment and urban energy demand: Different climate background perspectives. Science of The Total Environment. 2021; 795 ():148791.

Chicago/Turabian Style

Jun Yang; Yichen Wang; Bing Xue; Yunfei Li; Xiangming Xiaog; Jianhong (Cecilia) Xia; Baojie He. 2021. "Contribution of urban ventilation to the thermal environment and urban energy demand: Different climate background perspectives." Science of The Total Environment 795, no. : 148791.

Journal article
Published: 19 May 2021 in Journal of Cleaner Production
Reads 0
Downloads 0

Based on the multi-source data (e.g., building vector and remote sensing data) of the main urban areas of Chongqing, China, this study selected a few natural factors—the relief degree of the land surface (RDLS), land cover index (LCI), annual average land surface temperature (LST), water resource index (WRI), and frontal area index (FAI)—and used the geographic information system spatial analysis method to quantitatively investigate the spatial variation in the suitability of human settlements in mountainous areas from the perspective of ventilation. The study findings can be summarized as follows: 1) The population distribution in the main urban areas of Chongqing is affected by, in descending order, the LCI, FAI, RDLS, WRI, and LST. 2) In the main urban areas of Chongqing, the RDLS ranges from 0.21 to 2.82; it is low in the south and high in the north. The LCI ranges from 0.02 to 0.99; it is relatively low in those urban areas with a high building density. The LST ranges from 15.30 to 24.87 °C; in contrast to the spatial pattern of the LCI, the LST in the urban centers is higher than at the urban peripheries. The WRI ranges from 0.04 to 0.79; it is highest along the Yangtze and Jialing rivers. The FAI ranges from 0 to 1.63, exhibiting a gradual decline from the urban centers to the urban peripheries. As the FAI increases, the ventilation capacity worsens. 3) The ventilation-based human settlements index ranges from 0.06 to 0.54 in the mountainous areas of the city, gradually increasing from the southwest to the northeast in the main urban areas of Chongqing. In addition, zones with unsuitable human settlements are mainly distributed in mountainous regions with a high RDLS and relatively scarce water resources, whereas zones with suitable human settlements are primarily distributed in regions with a moderate RDLS, adequate vegetation cover, appropriate LST, abundant water resources, and adequate ventilation. The study findings can be used to evaluate the comfort level of human settlements, and have strategic significance to the efficient planning of urban development and the optimal layout of the population distribution.

ACS Style

Xue Luo; Jun Yang; Wei Sun; Baojie He. Suitability of human settlements in mountainous areas from the perspective of ventilation: A case study of the main urban area of Chongqing. Journal of Cleaner Production 2021, 310, 127467 .

AMA Style

Xue Luo, Jun Yang, Wei Sun, Baojie He. Suitability of human settlements in mountainous areas from the perspective of ventilation: A case study of the main urban area of Chongqing. Journal of Cleaner Production. 2021; 310 ():127467.

Chicago/Turabian Style

Xue Luo; Jun Yang; Wei Sun; Baojie He. 2021. "Suitability of human settlements in mountainous areas from the perspective of ventilation: A case study of the main urban area of Chongqing." Journal of Cleaner Production 310, no. : 127467.

Conference paper
Published: 11 May 2021 in Lecture Notes in Civil Engineering
Reads 0
Downloads 0

Cities are currently under various challenges such as the urbanization, environmental deterioration, climate change and human welling. To address such challenges, there is a strong need and awareness of implementing green products, projects and practices in cities. However, there is a gap between people’s perception, awareness and acceptable and decisions on green promotion. To achieve performance-based planning, therefore, this study used big data to analyze the global green market for appropriate decision on green promotion and implementation. In particular, using the big data provided by the Google Trends, this paper analyzed the temporal and spatial trends of green concepts in terms of green roof, green wall, energy saving and green city. The results indicate that green city was the most popular green concept in green market. Whilst national interest could provide stakeholders with the overall information about the green markets, stakeholders should also consider the city-level interest according to the local characteristics. Overall, this study provides a reference of using big data to generate data-driven decisions for performance-based planning.

ACS Style

Gaochuan Zhang; Bao-Jie He. Research on the Global Green Market Based on Big Data. Lecture Notes in Civil Engineering 2021, 139 -148.

AMA Style

Gaochuan Zhang, Bao-Jie He. Research on the Global Green Market Based on Big Data. Lecture Notes in Civil Engineering. 2021; ():139-148.

Chicago/Turabian Style

Gaochuan Zhang; Bao-Jie He. 2021. "Research on the Global Green Market Based on Big Data." Lecture Notes in Civil Engineering , no. : 139-148.

Research article
Published: 04 February 2021 in Environmental Science and Pollution Research
Reads 0
Downloads 0

While urban open spaces have been shrinking with the rapid urbanization, rooftop space use is an alternative solution to such problems. Rooftop thermal environment is a critical consideration under global warming and local warming. Although there have been studies on rooftop thermal environment, variation of rooftop thermal environment with roof typology has not been fully revealed to support rooftop space design. To fill this gap, a field experiment was conducted over green roof (GR), wooden roof (WR), and shaded roof (SR) in a temperate city of Kitakyushu, Japan. Environmental parameters such as solar radiation, air temperature, and relative humidity at different heights of these three roofs were recorded, to understand rooftop thermal environment and daily heat stress variation with rooftop types and the height above roof surface. The results indicate that WR had the highest diurnal near-surface temperature and the worst heat stress, where the near-surface heat stress could even reach the danger level. GR exhibited the lowest diurnal near-surface temperature and heat stress, where the heat stress was only under caution and almost safe condition. SR exhibited the lowest diurnal 1-m temperature and SR had the weakest heat stress, indicating the significance of installing shading devices for rooftop thermal environment improvement and heat stress alleviation. GR exhibited excellent performance in reducing air temperature and heat stress at the pedestrian level, where its worst heat stress was only in caution condition. Compared with that at 1-m height, moreover, 1-cm temperature and heat stress of WR and SR were generally higher, indicating that people may undergo worse heat stress when kneeling or sitting compared with upright activities. Moreover, GR suppressed near-surface heat stress due to its excellent cooling performance.

ACS Style

Gaochuan Zhang; Qian Wu; Bao-Jie He. Variation of rooftop thermal environment with roof typology: a field experiment in Kitakyushu, Japan. Environmental Science and Pollution Research 2021, 28, 28415 -28427.

AMA Style

Gaochuan Zhang, Qian Wu, Bao-Jie He. Variation of rooftop thermal environment with roof typology: a field experiment in Kitakyushu, Japan. Environmental Science and Pollution Research. 2021; 28 (22):28415-28427.

Chicago/Turabian Style

Gaochuan Zhang; Qian Wu; Bao-Jie He. 2021. "Variation of rooftop thermal environment with roof typology: a field experiment in Kitakyushu, Japan." Environmental Science and Pollution Research 28, no. 22: 28415-28427.

Review article
Published: 19 January 2021 in Urban Forestry & Urban Greening
Reads 0
Downloads 0

The environmental challenges in cities urge people to explore feasible strategies for resilient, sustainable, healthy and livable built environments, of which designing and building green roof (GR) is an important approach. Whilst extensive studies have been proving GR benefits in energy, environmental and ecological aspects, GR implementation (GRI) for achieving such multi-benefits has received limited attention. In order to facilitate GRI, therefore, this paper aims to delineate factors that can affect GRI. This study conducted a systematic review of 186 published papers from 2000 to 2019, for the identification of drivers, motivations and barriers to the GRI. The results indicate that the drivers to GRI include policy pressure, market pressure, and innovation and technology advancement. Besides, GRI can be potentially motivated by multiple factors including energy efficiency, urban heat island mitigation, roof longevity prolongation, air purification, runoff control, water purification, urban infrastructure improvement, sound insulation and noise reduction, biodiversity increase, recreation and aesthetics, property value enhancement and employment improvement. Nevertheless, GRI can be constrained by several barriers such as a lack of government policy, unsound technological level, unsound economic benefit assessment and individual unwillingness. According, this study proposed strategic recommendations in policy, technical, economic and social aspects, with the considerations of various GRI stakeholders (e.g. designer, engineer, constructor and builder, contractor, building operator, owner, end-user, government agent), to strengthen GRI drivers, foster GRI motivations and overcome GRI barriers. Overall, this study is of significance to inform the people with knowledge of factors affecting GRI, which can further promote researchers to explore interrelationships among multiple factors on the one hand and can further promote decision-makers to develop sound policies on the other for GR adoption.

ACS Style

Gaochuan Zhang; Bao-Jie He. Towards green roof implementation: Drivers, motivations, barriers and recommendations. Urban Forestry & Urban Greening 2021, 58, 126992 .

AMA Style

Gaochuan Zhang, Bao-Jie He. Towards green roof implementation: Drivers, motivations, barriers and recommendations. Urban Forestry & Urban Greening. 2021; 58 ():126992.

Chicago/Turabian Style

Gaochuan Zhang; Bao-Jie He. 2021. "Towards green roof implementation: Drivers, motivations, barriers and recommendations." Urban Forestry & Urban Greening 58, no. : 126992.

Journal article
Published: 04 December 2020 in Environmental Research
Reads 0
Downloads 0

Heat waves (HWs) and urban heat islands (UHIs) can potentially interact. The mechanisms behind their synergy are not fully disclosed. Starting from the localized UHI phenomenon, this study aims i) to reveal their associated impacts on human thermal comfort through three different definitions of HW events, based on air temperature (airT), wet-bulb globe temperature (WBGT) and human-perceived temperature (AppT) respectively, and ii) to understand the role of air moisture and wind. The analysis was conducted in four districts (NH, JD, MH and XJH) with different urban development patterns and geographic conditions, in the megacity of Shanghai with a subtropical humid climate. Results evidenced the localized interplay between HWs and UHIs. The results indicate that less urbanized districts were generally more sensitive to the synergies. JD district recorded the highest urban heat island intensity (UHII) amplification, regardless of the specific HW definition. Notably, during AppT-HWs, the increment was observed in terms of maximum (1.3 °C), daily average (0.8 °C), diurnal (0.4 °C) and nocturnal UHII (1.0 °C). Nevertheless, localized synergies between HWs and UHIs at different stations also exhibited some commonalities. Under airT-HW, the UHII was amplified throughout the day at all stations. Under WBGT-HW, diurnal UHII (especially at 11:00-17:00 LST) was consistently amplified at all stations. Under AppT-HW conditions, the nocturnal UHII was slightly amplified at all stations. Air moisture and wind alleviated the synergistic heat exacerbation to the benefit of thermal comfort. The extent depended on geographic condition, diurnal and nocturnal scenarios, temperature type and HW/normal conditions. Stronger HW-UHI synergies indicate the necessity to develop specific urban heat emergency response plans, able to capture and intervene on the underlying mechanisms. This study paves to way to their identification.

ACS Style

Bao-Jie He; Junsong Wang; Huimin Liu; Giulia Ulpiani. Localized synergies between heat waves and urban heat islands: Implications on human thermal comfort and urban heat management. Environmental Research 2020, 193, 110584 .

AMA Style

Bao-Jie He, Junsong Wang, Huimin Liu, Giulia Ulpiani. Localized synergies between heat waves and urban heat islands: Implications on human thermal comfort and urban heat management. Environmental Research. 2020; 193 ():110584.

Chicago/Turabian Style

Bao-Jie He; Junsong Wang; Huimin Liu; Giulia Ulpiani. 2020. "Localized synergies between heat waves and urban heat islands: Implications on human thermal comfort and urban heat management." Environmental Research 193, no. : 110584.

Research article
Published: 19 September 2020 in Building Simulation
Reads 0
Downloads 0

This study analyzes the growth and reproduction of dust accumulated fungi (DAF) in an air-conditioning system based on field measurement and molecular biology, laboratory experiment and prediction modelling. The field measurement was conducted to collect dust in filter screen, surface cooler and air supply duct of two air handling units (AHUs). The results indicate that dust volume and fungal number in two AHUs generally met the hygienic specification of public buildings, but the cleansing did not fulfil requirements. High-throughput sequencing was conducted, revealing that the dominant fungal species were Alternaria_betae-kenyensis, Cladosporium_delicatulum, Aspergillus_sydowii, Verticillium_dahliae. Laboratory experiment was conducted to analyze the impact of several factors (e.g. growth time, temperature, relative humidity, duct material) and their combination on the DAF growth. The results indicate that fungal growth increased with time, peaking at 4 days or 5 days. Higher relative humidity or temperature was conducive to fungal growth. The orthogonal experiment revealed that the condition of “antibacterial composite, 22 ± 1 °C and 45%–55% RH” had the strongest inhibiting impact on fungal growth. Logistic model, Gompertz model and square-root model were further developed to predict the fungal growth under different conditions. The results show that the Logistic model had high feasibility and accuracy, the Gompertz model was feasible with lower accuracy and the square-root model was feasible with high accuracy. Overall, this study facilitates the understanding of the DAF growth in air-conditioning ducts, which is important for real-time prediction and timely control of the fungal contamination.

ACS Style

Zhijian Liu; Yuzhu Deng; Shengyuan Ma; Bao-Jie He; Guoqing Cao. Dust accumulated fungi in air-conditioning system: Findings based on field and laboratory experiments. Building Simulation 2020, 14, 793 -811.

AMA Style

Zhijian Liu, Yuzhu Deng, Shengyuan Ma, Bao-Jie He, Guoqing Cao. Dust accumulated fungi in air-conditioning system: Findings based on field and laboratory experiments. Building Simulation. 2020; 14 (3):793-811.

Chicago/Turabian Style

Zhijian Liu; Yuzhu Deng; Shengyuan Ma; Bao-Jie He; Guoqing Cao. 2020. "Dust accumulated fungi in air-conditioning system: Findings based on field and laboratory experiments." Building Simulation 14, no. 3: 793-811.

Journal article
Published: 09 August 2020 in Environmental Impact Assessment Review
Reads 0
Downloads 0

The quality of human life has been increasingly a significant concern, where the public space environment is one of the critical influential factors. The location with historic buildings has been an attractive destination for people to enjoy outdoor activities. Moreover, the building façade, being the boundary element of the public space, plays an important role in deciding human outdoor activities. Whilst many studies focus on building materials, structure, energy consumption and human attitude towards building façade in public spaces, limited studies have been conducted to analyse the influence of the small-scale public space historic building facade on human outdoor activities. Therefore, this study aims to explore whether the façade of historical buildings in small-scale public spaces causes people to aggregate. This study was conducted in the Donglu campus of Yunnan University, Kunming, China. A comprehensive analysis of façade characteristics (e.g. age, structure, materials) of historical buildings, combined with the questionnaire survey data of facade preference of buildings was conducted in this campus in May 6–12, 2019. The method of spatial statistical analysis was adopted to analyse the relationship between historical building façade and human behaviour. The results show that human preference exhibited an aggregation phenomenon, demonstrating that the human behaviour could be influenced by the façade characteristics of historical buildings. The peculiar building façade (e.g. Huize Hall, Zhigong Hall) could attract more human attention, in which architectural style and decoration played a vital role. Nevertheless, the historic building's long history and cultural inherence also affected human preferences. Such results help to improve the protection and use of historical buildings in public spaces, enhance the understanding of impacts about historical buildings on human behaviour, and provide a reference for new building façade design with the consideration of human outdoor activities.

ACS Style

Yao Mao; Jinda Qi; Bao-Jie He. Impact of the heritage building façade in small-scale public spaces on human activity: Based on spatial analysis. Environmental Impact Assessment Review 2020, 85, 106457 .

AMA Style

Yao Mao, Jinda Qi, Bao-Jie He. Impact of the heritage building façade in small-scale public spaces on human activity: Based on spatial analysis. Environmental Impact Assessment Review. 2020; 85 ():106457.

Chicago/Turabian Style

Yao Mao; Jinda Qi; Bao-Jie He. 2020. "Impact of the heritage building façade in small-scale public spaces on human activity: Based on spatial analysis." Environmental Impact Assessment Review 85, no. : 106457.

Journal article
Published: 23 July 2020 in Atmosphere
Reads 0
Downloads 0

Studies on urban ventilation indicate that urban ventilation performance is highly dependent on urban morphology. Some studies have linked local-scale urban ventilation performance with the local climate zone (LCZ) that is proposed for surface temperature studies. However, there is a lack of evidence-based studies showing LCZ ventilation performance and affirming the reliability of using the LCZ classification scheme to demonstrate local-scale urban ventilation performance. Therefore, this study aims to analyse LCZ ventilation performances in order to understand the suitability of using the LCZ classification scheme to indicate local-scale urban ventilation performance. This study was conducted in Shenyang, China, with wind information at 16 weather stations in 2018. The results indicate that the Shenyang weather station had an annual mean wind speed of 2.07 m/s, while the mean wind speed of the overall 16 stations was much lower, only 1.44 m/s in value. The mean wind speed at Shenyang weather station and the 16 stations varied with seasons, day and night and precipitation conditions. The spring diurnal mean wind was strong with the speeds of 3.56 m/s and 2.21 m/s at Shenyang weather station and the 16 stations, respectively. The wind speed (2.21 m/s at Shenyang weather station) under precipitation conditions was higher than that (1.75 m/s at Shenyang weather station) under no precipitation conditions. Downtown ventilation performance was weaker than the approaching wind background, where the relative mean wind speed in the downtown area was only 0.53, much less than 1.0. The downtown ventilation performance also varied with seasons, day and night and precipitation conditions, where spring diurnal downtown ventilation performance was the weakest and the winter nocturnal downtown ventilation performance was the strongest. Moreover, the annual mean wind speed of the 16 zones decreased from the sparse, open low-rise zones to the compact midrise zones, indicating the suitability of using LCZ classification scheme to indicate local-scale urban ventilation performance. The high spatial correlation coefficients under different seasons, day and night and precipitation conditions, ranging between 0.68 and 0.99, further affirmed that LCZ classification scheme is also suitable to indicate local-scale urban ventilation performance, despite without the consideration of street structure like precinct ventilation zone scheme.

ACS Style

Ziqi Zhao; Lidu Shen; Liguang Li; Hongbo Wang; Bao-Jie He. Local Climate Zone Classification Scheme Can Also Indicate Local-Scale Urban Ventilation Performance: An Evidence-Based Study. Atmosphere 2020, 11, 776 .

AMA Style

Ziqi Zhao, Lidu Shen, Liguang Li, Hongbo Wang, Bao-Jie He. Local Climate Zone Classification Scheme Can Also Indicate Local-Scale Urban Ventilation Performance: An Evidence-Based Study. Atmosphere. 2020; 11 (8):776.

Chicago/Turabian Style

Ziqi Zhao; Lidu Shen; Liguang Li; Hongbo Wang; Bao-Jie He. 2020. "Local Climate Zone Classification Scheme Can Also Indicate Local-Scale Urban Ventilation Performance: An Evidence-Based Study." Atmosphere 11, no. 8: 776.

Journal article
Published: 08 June 2020 in Sustainable Cities and Society
Reads 0
Downloads 0

Urban temperature increase is a critical problem for many cities. Green roofing is an approach to mitigating urban temperature increase, while the maintenance of the green roof for stable cooling potential has been less studied. Therefore, this study aims to investigate the cooling performance of prefabricated green roof for maintenance purposes. Focusing on the cooling and humidifying performance of the green roof, this study is to understand the influence of (i) vegetation species, (ii) weather condition and (iii) watering. This study was experimentally performed in the subtropical city of Hangzhou, China in the summer season, with three local vegetation species including Pomegranate, Bermuda grass and Sedum lineare. Results indicate that under sunny conditions, the Pomegranate roof was favourable with the best diurnal cooling and humidifying effects, the Bermuda grass roof could be acceptable while the Sedum lineare roof is not suggested. In comparison, all green roofs could maintain diurnal cooling and humidifying effects under cloudy conditions. Watering is critical to green roof cooling and humidifying effects. Without watering, all green roofs could elevate air temperature and dry surrounding environment and could die. The Pomegranate should be watered before 15:00 under sunny condition, while both Bermuda grass and Sedum lineare roofs should be watered before noon. Moreover, nocturnal watering makes slight differences to green roof cooling and humidifying effects. Overall, this study helps understand the green roof cooling and humidifying effects and it can instruct green roof management and maintenance.

ACS Style

Gaochuan Zhang; Bao-Jie He; Bart Julien Dewancker. The maintenance of prefabricated green roofs for preserving cooling performance: A field measurement in the subtropical city of Hangzhou, China. Sustainable Cities and Society 2020, 61, 102314 .

AMA Style

Gaochuan Zhang, Bao-Jie He, Bart Julien Dewancker. The maintenance of prefabricated green roofs for preserving cooling performance: A field measurement in the subtropical city of Hangzhou, China. Sustainable Cities and Society. 2020; 61 ():102314.

Chicago/Turabian Style

Gaochuan Zhang; Bao-Jie He; Bart Julien Dewancker. 2020. "The maintenance of prefabricated green roofs for preserving cooling performance: A field measurement in the subtropical city of Hangzhou, China." Sustainable Cities and Society 61, no. : 102314.

Journal article
Published: 28 May 2020 in Sustainable Cities and Society
Reads 0
Downloads 0

Many cities are facing the problem of urban heat island (UHI) and UHI mitigation is becoming crucial in urban planning and design. The reasonable wind-sensitive design may be a feasible approach to UHI mitigation and outdoor thermal comfort improvement, as cool wind (i.e. sea breeze) is a good cooling intervention. Consistent with the precinct ventilation zone scheme, this study experimentally investigated relationships among urban morphology, precinct ventilation performance, UHIs and outdoor thermal comfort in a compact high-rise gridiron precinct in the coastal Sydney, Australia. Results indicate that precinct morphological characteristics had a strong modification effect on precinct ventilation. As a result, under different combination of external meteorological conditions and precinct morphological characteristics, there was no significant difference in precinct ventilation performance (i.e. relative wind velocity ratio). The precinct ventilation performance forced by sea breeze could significantly mitigate UHIs. Meanwhile, the precinct ventilation performance forced by the sea breeze could significantly improve relative humidity which could further significantly improve outdoor thermal comfort. The street orientation was no longer a critical factor affecting precinct ventilation performance, UHIs and outdoor thermal comfort at the precinct scale. Overall, this study preliminarily revealed precinct ventilation performance and its influence on UHIs and outdoor thermal comfort. The cooling and humidifying effects of wind background cannot be ignored in microclimate studies and should be considered for microclimate regulation in urban planning and design.

ACS Style

Bao-Jie He; Lan Ding; Deo Prasad. Relationships among local-scale urban morphology, urban ventilation, urban heat island and outdoor thermal comfort under sea breeze influence. Sustainable Cities and Society 2020, 60, 102289 .

AMA Style

Bao-Jie He, Lan Ding, Deo Prasad. Relationships among local-scale urban morphology, urban ventilation, urban heat island and outdoor thermal comfort under sea breeze influence. Sustainable Cities and Society. 2020; 60 ():102289.

Chicago/Turabian Style

Bao-Jie He; Lan Ding; Deo Prasad. 2020. "Relationships among local-scale urban morphology, urban ventilation, urban heat island and outdoor thermal comfort under sea breeze influence." Sustainable Cities and Society 60, no. : 102289.

Journal article
Published: 04 May 2020 in Cities
Reads 0
Downloads 0

In China, self-claimed vegetable lots are emerging in urban communities through the appropriation of public green lands, a paralleled ‘guerrilla gardening’ phenomenon. However, disputes and conflicts arise due to the contested method of garden acquisition. Moreover, these gardens are rather stigmatised due to the urban-biased regulations embedded in China's aggressive urbanisation agenda, indicating the gap between grassroots spatial demand and top-down regulations. Using the case of Hangzhou, this paper aims to understand the governance challenges of self-claimed gardens in urban China through stakeholder interviews and survey. Findings reveal that the attitudes, interests and influences of gardeners, non-gardeners and community officials contribute to a cyclical spatial transformation between green land and gardens. The stigmatisation of and conflicts around gardens result from both an unfair stereotype of ‘uncivilised behaviour’ and inconsiderate ways of growing vegetables. The case study has also demonstrated that gardens have provided benefits in setting up social ties and strengthening a sense of community in China's high-density built environment. The governance structure of gardens should be shifted with the help of planning system refinement to de-stigmatise and legitimise gardening and increase the promising possibility of gardens becoming a new dawn for the public realm.

ACS Style

Jin Zhu; Bao-Jie He; Weicheng Tang; Sian Thompson. Community blemish or new dawn for the public realm? Governance challenges for self-claimed gardens in urban China. Cities 2020, 102, 102750 .

AMA Style

Jin Zhu, Bao-Jie He, Weicheng Tang, Sian Thompson. Community blemish or new dawn for the public realm? Governance challenges for self-claimed gardens in urban China. Cities. 2020; 102 ():102750.

Chicago/Turabian Style

Jin Zhu; Bao-Jie He; Weicheng Tang; Sian Thompson. 2020. "Community blemish or new dawn for the public realm? Governance challenges for self-claimed gardens in urban China." Cities 102, no. : 102750.

Journal article
Published: 30 April 2020 in Applied Sciences
Reads 0
Downloads 0

Bioretention has great potential in managing and purifying urban stormwater runoff. However, information regarding the removal of nutrients in bioretention systems with the use of media, plants, and saturated areas is still limited. In this study, three devices of control, conventional bioretention (DS), and strengthened bioretention (SZ) were investigated to enhance the simultaneous removal of nitrogen and phosphorus. The experimental column SZ showed the best performance for total phosphorus (TP), ammonia (NH4+-N) and total nitrogen (TN) removal (85.6–92.4%, 83.1–92.7%, 57.1–74.1%, respectively), whereas DS columns performed poorly for NH4+-N removal (43.6–81.2%) under different conditions. For the removal of nitrate, the columns of Control and DS exhibited negative performance (−14.3% and −8.2%) in a typical event. Further evaluation of water quality revealed that in the early stages of rainfall, the effluent of the SZ column was able to reach quality standards of Grade IV for surface water in China. Moreover, although the ion-exchange and phosphate precipitation occurred on the surface of the media, which were placed in the saturation zone, it did not change the surface crystal structure.

ACS Style

Hui Luo; Lin Guan; Zhaoqian Jing; Baojie He; Xinyue Cao; Zeyu Zhang; Mengni Tao. Performance Evaluation of Enhanced Bioretention Systems in Removing Dissolved Nutrients in Stormwater Runoff. Applied Sciences 2020, 10, 3148 .

AMA Style

Hui Luo, Lin Guan, Zhaoqian Jing, Baojie He, Xinyue Cao, Zeyu Zhang, Mengni Tao. Performance Evaluation of Enhanced Bioretention Systems in Removing Dissolved Nutrients in Stormwater Runoff. Applied Sciences. 2020; 10 (9):3148.

Chicago/Turabian Style

Hui Luo; Lin Guan; Zhaoqian Jing; Baojie He; Xinyue Cao; Zeyu Zhang; Mengni Tao. 2020. "Performance Evaluation of Enhanced Bioretention Systems in Removing Dissolved Nutrients in Stormwater Runoff." Applied Sciences 10, no. 9: 3148.

Journal article
Published: 01 March 2020 in Urban Climate
Reads 0
Downloads 0
ACS Style

Bao-Jie He; Lan Ding; Deo Prasad. Outdoor thermal environment of an open space under sea breeze: A mobile experience in a coastal city of Sydney, Australia. Urban Climate 2020, 31, 1 .

AMA Style

Bao-Jie He, Lan Ding, Deo Prasad. Outdoor thermal environment of an open space under sea breeze: A mobile experience in a coastal city of Sydney, Australia. Urban Climate. 2020; 31 ():1.

Chicago/Turabian Style

Bao-Jie He; Lan Ding; Deo Prasad. 2020. "Outdoor thermal environment of an open space under sea breeze: A mobile experience in a coastal city of Sydney, Australia." Urban Climate 31, no. : 1.

Journal article
Published: 14 January 2020 in Sustainable Cities and Society
Reads 0
Downloads 0

The reduction of urban ventilation is one of the significant causes of the urban heat island (UHI) phenomenon. Reasonable urban planning and design can guide cooler wind into cities, thereby mitigating UHI phenomenon. However, existing knowledge of the cooling effect of urban ventilation is mainly at the regional or city scale, while the lack of information on ‘realistic’ precinct ventilation limits the use of wind for UHI mitigation. Therefore, this study aims to understand the precinct ventilation and its associated influences on UHI effects and outdoor thermal comfort. In specific, a case study analysis was performed in summer in a precinct of the coastal Sydney, Australia. Results indicate that in the open low-rise gridiron precinct, the precinct ventilation performance (PVP), precinct outdoor thermal environment (POTE) and precinct outdoor thermal comfort (POTC) significantly varied with the combination of external meteorological conditions and precinct morphological characteristics, while the street orientation made insignificant influence to PVP, POTE and POTC. The PVP exhibited its significant potentials for UHII reduction and POTC improvement. The PVP forced by the sea breeze could further enhance relative humidity for UHII reduction and POTC improvement. Overall, this study presents the understanding of PVP and the associated influence on POTE and POTC under realistic and complicated precinct context. It can further facilitate wind-sensitive urban planning and design for local warming mitigation.

ACS Style

Bao-Jie He; Lan Ding; Deo Prasad. Urban ventilation and its potential for local warming mitigation: A field experiment in an open low-rise gridiron precinct. Sustainable Cities and Society 2020, 55, 102028 .

AMA Style

Bao-Jie He, Lan Ding, Deo Prasad. Urban ventilation and its potential for local warming mitigation: A field experiment in an open low-rise gridiron precinct. Sustainable Cities and Society. 2020; 55 ():102028.

Chicago/Turabian Style

Bao-Jie He; Lan Ding; Deo Prasad. 2020. "Urban ventilation and its potential for local warming mitigation: A field experiment in an open low-rise gridiron precinct." Sustainable Cities and Society 55, no. : 102028.

Journal article
Published: 26 December 2019 in Journal of Building Engineering
Reads 0
Downloads 0

Urban heat island (UHI) phenomenon is a severe issue faced by many cities and the reduction of urban ventilation is one of the significant causes. Reasonable urban planning and design can allow cooler wind penetration and thereby UHI mitigation. Upon the local climate zone, the precinct ventilation zone is developed at the local scale with the consideration of wind influence during planning and design. Nevertheless, the precinct ventilation performance (PVP) and its potential influence on precinct outdoor thermal environment (POTE) and precinct outdoor thermal comfort (POTC) have not been well understood. As a result, this study aims to examine PVP and its associated influence on POTE and POTC. This is achieved by a case study within an open midrise gridiron (OMG) precinct in Sydney, Australia during summertime. Result indicates the combinations of the OMG precinct with different external meteorological conditions (EMC) resulted in significant variations in PVP, POTE and POTC. Street orientation in the OMG precinct was not a determinant of PVP, POTE and POTC variations. Compared with the inland wind, sea breeze resulted in weaker UHII within the OMG precinct and more areas underwent cool island effects. Nevertheless, wind could not fully explain the variation of POTE and POTC, while it still had cooling potentials under specific conditions. When the sea breeze prevailed, wind exhibited its cooling potential under the combination of negative UHII and shading as well as that of positive UHII and solar exposure. Forced by the inland wind, precinct ventilation could still have cooling potential under positive UHII and solar exposure combination. Moreover, for cities like Sydney with not high air moisture, moisture increase could result in UHI mitigation and POTC improvement, which was also a way of sea breeze cooling under certain conditions. Afterwards, some implications for local warming mitigation through precinct planning and design have been presented. Overall, this study provides the understandings of the PVP and its associated influence on POTE and POTC within the OMG precinct, and can practically inform urban planners and designers with the wind-sensitive urban planning and design for local warming mitigation.

ACS Style

Bao-Jie He; Lan Ding; Deo Prasad. Wind-sensitive urban planning and design: Precinct ventilation performance and its potential for local warming mitigation in an open midrise gridiron precinct. Journal of Building Engineering 2019, 29, 101145 .

AMA Style

Bao-Jie He, Lan Ding, Deo Prasad. Wind-sensitive urban planning and design: Precinct ventilation performance and its potential for local warming mitigation in an open midrise gridiron precinct. Journal of Building Engineering. 2019; 29 ():101145.

Chicago/Turabian Style

Bao-Jie He; Lan Ding; Deo Prasad. 2019. "Wind-sensitive urban planning and design: Precinct ventilation performance and its potential for local warming mitigation in an open midrise gridiron precinct." Journal of Building Engineering 29, no. : 101145.

Journal article
Published: 15 November 2019 in Science of The Total Environment
Reads 0
Downloads 0

Fungal spore resuspension on the surfaces of the heating, ventilation and air-conditioning (HVAC) ducts have been verified as one of the most important factors causing indoor biological pollution. To effectively control indoor bioaerosols pollution, it is essential to understand the resuspension characteristics of fungal spores in HVAC ducts. Therefore, this study aims to investigate the movement behavior of particles and further the variation of particle resuspension with HVAC operation mode. Based on the experimental and numerical study, this study specifically investigated the micro-movement behavior of particles and impact of particle size (1, 4, 7 and 10 μm), air temperature (9, 15 and 30 °C), relative humidity (20, 50 and 80%), duct surface roughness (0.5 and 50 μm) and air velocity (0.3, 0.9, 1.5 and 2.5 m/s) on the short-term resuspension of particle in horizontal HVAC ducts. Results indicate that spore particles were dominantly rolling off rather than sliding or being lifted into the air. Compared with larger particles, smaller ones were more sensitive to the wall roughness. The resuspension rate of spores was mainly affected by airflow velocity and particle size, where the resuspension rate of particles increased by up to six times with the increase of airflow velocity from 0.9 to 2.5 m/s. In comparison, either air temperature or relative humidity made negligible difference to particle resuspension rate. Overall, this study provides the knowledge of fungal spore resuspension in HVAC ducts, laying the foundation for effectively controlling the indoor biological pollution.

ACS Style

Zhijian Liu; Haotian Niu; Rui Rong; Guoqing Cao; Bao-Jie He; Qihong Deng. An experiment and numerical study of resuspension of fungal spore particles from HVAC ducts. Science of The Total Environment 2019, 708, 134742 .

AMA Style

Zhijian Liu, Haotian Niu, Rui Rong, Guoqing Cao, Bao-Jie He, Qihong Deng. An experiment and numerical study of resuspension of fungal spore particles from HVAC ducts. Science of The Total Environment. 2019; 708 ():134742.

Chicago/Turabian Style

Zhijian Liu; Haotian Niu; Rui Rong; Guoqing Cao; Bao-Jie He; Qihong Deng. 2019. "An experiment and numerical study of resuspension of fungal spore particles from HVAC ducts." Science of The Total Environment 708, no. : 134742.

Journal article
Published: 01 November 2019 in Solar Energy
Reads 0
Downloads 0
ACS Style

Junsong Wang; Bao-Jie He; Hao Wang; Matthaios Santamouris. Towards higher quality green building agenda – An overview of the application of green building techniques in China. Solar Energy 2019, 193, 473 -493.

AMA Style

Junsong Wang, Bao-Jie He, Hao Wang, Matthaios Santamouris. Towards higher quality green building agenda – An overview of the application of green building techniques in China. Solar Energy. 2019; 193 ():473-493.

Chicago/Turabian Style

Junsong Wang; Bao-Jie He; Hao Wang; Matthaios Santamouris. 2019. "Towards higher quality green building agenda – An overview of the application of green building techniques in China." Solar Energy 193, no. : 473-493.