Impacts of urban morphological characteristics on nocturnal outdoor lighting environment in cities: An empirical investigation in Shenzhen

Pan, Wenjian; Du, Jianqing

doi:10.1016/j.buildenv.2021.107587

Cited by 27 publications

(13 citation statements)

References 55 publications

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“…The differences between nighttime and daytime vitality are not only temporal, but also social and environmental dimensions (Kim 2020). In addition, the spatial variations of nighttime vitality depends much on the destinations that are selected by the residents’ subjective perception (Pan and Du 2021). Therefore, it is necessary to find an appropriate proxy to represent the nighttime vitality.…”

Section: Introductionmentioning

confidence: 99%

Measuring urban nighttime vitality and its relationship with urban spatial structure: A data-driven approach

Zhao

2022

Environment and Planning B: Urban Analytics and City Science

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Nighttime vitality has garnered attention in recent years as an important indicator reflecting urban economy and quality of life. However, it is difficult to characterize this intangible issue. As a response, this study employed a data-driven approach to measure nighttime vitality and explored its relationships with urban spatial structure. Specifically, the data from Meituan.com—the largest Chinese shopping platform for local consumer products and retail services—were used to measure nighttime vitality based on a hierarchical weighting method. Multidimensional characteristics of the urban spatial structure were evaluated. Spatial regression models were conducted on the effect analysis of urban spatial structure on nighttime vitality. Relationship estimations were statistically significant with indicators, such as block functions, building density, interaction density, enclosure of locals, and the age structure of the main population. Our findings provide a more complete understanding of nighttime vitality, which is often overlooked in urban vitality studies. Insights derived from this study could help formulate spatial strategies to enhance nighttime vitality and quality of life.

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Section: Introductionmentioning

confidence: 99%

Measuring urban nighttime vitality and its relationship with urban spatial structure: A data-driven approach

Zhao

2022

Environment and Planning B: Urban Analytics and City Science

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Section: Soft and Hard Landscape Elementsmentioning

confidence: 99%

“…The interaction between electric lighting and soft landscape elements, such as trees and bushes, results in varying effects due to light being reflected or diffused [26,30]. Illuminated buildings and spatial forms located within a height range of 0-20 metres can produce intrusive and spilled light [30]. The texture of trees, dense or light, determines the visual quality of the surroundings and should be taken into account when planning illumination.…”

Section: Soft and Hard Landscape Elementsmentioning

confidence: 99%

“…Dense-textured trees can effectively be illuminated by fixtures from a distance due to their low light transmittance [31]. Dense and tall vegetation cover at pedestrian height can contribute to an improved perception of the light distribution [26,30], and broad-leaved trees can act as reflectors and diffusers, leading to the impression of a "largescale outdoor living room" [30]. In natural surroundings, non-uniformly distributed lighting and sharp contrasts are softened due to tall trees; therefore, large pole spacings of 40 metres become unnoticeable [26].…”

Section: Soft and Hard Landscape Elementsmentioning

confidence: 99%

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Light formed through urban morphology and different organism groups: First findings from a systematic review.

Dincel,

Besenecker,

Koch

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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The prevailing implementation and usage of contemporary lighting technologies and design practices in cities have created over-illuminated built environments. Recent studies indicate that exposure to electric lighting effects formed through spatial characteristics has visual, physiological, and behavioural effects on both humans and non-humans, such as wildlife. In order to gain a better understanding of the impact that electric lighting has on space and different organism groups, a comprehensive literature review was conducted applying PRISMA 2020 systematic review guidelines. Results of the searches from various databases, such as Web of Science, PubMed and Scopus, identified 5260 related studies. A total of 55 papers connected to four themes: (1) urban morphology; (2) human visual impressions; (3) ecological impacts; and (4) design approaches and methods were analysed with a focus on urban morphology. The review provided the following general findings: lighting properties alone are inadequate to depict visual impressions of pedestrians, patterns formed through light interacting with spatial characteristics can contribute to understanding how spaces are visually perceived and help characterising the exposure of wildlife organisms to potential disturbances.

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“… Farahat et al ( 2014 ) Exterior Some sites It was carried out a research on the effects of urban morphological characteristics on nocturnal exterior lighting environment in cities. Pan and Du ( 2021 ) Exterior University campus It has been investigated to swich off some lights, dimming the lamps, and replacing the lamps with efficient ones using some scenarios for exterior lighting efficiency. They have been achieved 762 MWh/year energy saving, 251 ton CO 2 saving and 60% energy saving with Scenario-4.…”

Section: Introductionmentioning

confidence: 99%

Assessing the electricity energy efficiency of university campus exterior lighting system and proposing energy-saving strategies for carbon emission reduction

Kerem

2022

Microsyst Technol

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This paper presents efficiencies research and energy-saving strategies for carbon emission reduction of the exterior lighting system of Avşar Campus of Kahramanmaraş Sütçü İmam University, Turkey. Once the campus’s average energy consumption for the previous five years was calculated, it was found to be 18,802 Megawatt hour/year (MWh/year), with 6,203 carbon dioxide (CO 2 ) tons/year emissions. Also, the annual electrical energy consumption for exterior lighting was calculated as 670,395 MWh/year, with annual emissions of 221,170 CO 2 tons/year. Inefficient lamp choices in exterior lighting systems and longer than necessary operating times have been identified as the causes of these high values. That’s because High-Pressure Sodium (HPS) lamps with an installed power of 109,050 Kilowatt (kW), which have a low efficiency but a high energy consumption, provide for 70% of exterior lighting. Thus, seven unique energy-saving strategies have been designed with the aim of decreasing total energy consumption and achieving more cost savings as well as less harmful emissions released into the atmosphere. All of the strategies were designed under the following three headings: dimming method, optimization of lamps’ operation times, and retrofitting lamps with new and technological ones. The study’s novelty lies in the creation of seven unique energy-saving strategies for the first time in light of the three headings highlighted, as well as their adjustment to a sophisticated campus with such high energy consumption. Once all of the proposed strategies are compared to the current system, it has been discovered that strategy-7 saves 81.656% energy consumption (547,418 MWh/year), 180,599 CO 2 tons/year saving, and € 49,268 (€/year) cost-saving. Such a low energy consumption is vital for a rapidly growing and expanding campus in terms of carbon emissions, cost savings, and environmental quality.

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Impacts of urban morphological characteristics on nocturnal outdoor lighting environment in cities: An empirical investigation in Shenzhen

Cited by 27 publications

References 55 publications

Measuring urban nighttime vitality and its relationship with urban spatial structure: A data-driven approach

Measuring urban nighttime vitality and its relationship with urban spatial structure: A data-driven approach

Light formed through urban morphology and different organism groups: First findings from a systematic review.

Assessing the electricity energy efficiency of university campus exterior lighting system and proposing energy-saving strategies for carbon emission reduction

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