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Urbanity: automated modelling and analysis of multidimensional networks in cities 城市化:城市多维网络的自动化建模和分析
Q1 ENVIRONMENTAL STUDIES Pub Date : 2023-07-25 DOI: 10.1038/s42949-023-00125-w
Winston Yap, Rudi Stouffs, Filip Biljecki
Urban networks play a vital role in connecting multiple urban components and developing our understanding of cities and urban systems. Despite the significant progress we have made in understanding how city networks are connected and spread out, we still have a lot to learn about the meaning and context of these networks. The increasing availability of open data offers opportunities to supplement urban networks with specific location information and create more expressive urban machine-learning models. In this work, we introduce Urbanity, a network-based Python package to automate the construction of feature-rich urban networks anywhere and at any geographical scale. We discuss data sources, the features of our software, and a set of data representing the networks of five major cities around the world. We also test the usefulness of added context in our networks by classifying different types of connections within a single network. Our findings extend accumulated knowledge about how spaces and flows within city networks work, and affirm the importance of contextual features for analyzing city networks.
城市网络在连接多个城市组成部分以及加深我们对城市和城市系统的理解方面发挥着至关重要的作用。尽管我们在了解城市网络如何连接和分布方面取得了重大进展,但我们在这些网络的意义和背景方面仍有很多东西需要学习。开放数据的日益普及为我们提供了机会,使我们可以利用具体的位置信息对城市网络进行补充,并创建更具表现力的城市机器学习模型。在这项工作中,我们介绍了 Urbanity,这是一个基于网络的 Python 软件包,可在任何地方、任何地理范围内自动构建特征丰富的城市网络。我们讨论了数据来源、软件功能和一组代表全球五大城市网络的数据。我们还通过对单个网络中不同类型的连接进行分类,测试了在网络中添加上下文的实用性。我们的研究结果扩展了关于城市网络中的空间和流动如何运作的知识积累,并肯定了语境特征对于分析城市网络的重要性。
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引用次数: 0
Exploring the potential connection between place capital and health capital in the post COVID-19 city 探索新冠肺炎后城市地方资本与卫生资本之间的潜在联系
Q1 ENVIRONMENTAL STUDIES Pub Date : 2023-07-21 DOI: 10.1038/s42949-023-00124-x
Kate Meyrick, Peter Newman
Great places have the potential to create enhanced health outcomes and improve quality of life. The positive connection between the built environment and the social determinants of health is well documented as is the role of the built environment in establishing place quality and sense of place. However, the relationship between the concepts of place capital and health capital is less understood and specifically the extent to which high levels of place capital confer a protective and restorative health benefit across the whole of life. COVID-19 changed our appreciation of the role that both health and place play in supporting our quality and way of life and has revealed the negative impact on wellness and wellbeing that arises when our connection to place is fractured. To contribute to the debate surrounding the post-COVID-19 city, this paper explores the intrinsic connection between place and health; it proposes a conceptual model that positions place capital as a tool for enhancing whole of life health capital at a neighbourhood scale. The Framework for measuring this place capital is created from traditional place literature and the new place context literature on the need to be inclusive, equitable and sustainable. It suggests that by building great places that are based on these measurable factors, there can be a reduction in the growth of medical spending and burden of disease over time.
好地方有可能带来更好的健康结果并提高生活质量。建筑环境与健康的社会决定因素之间的积极联系,以及建筑环境在建立场所质量和场所感方面的作用,都已得到充分证明。然而,人们对场所资本和健康资本概念之间的关系了解较少,特别是对高水平的场所资本在多大程度上对整个生活产生保护和恢复健康的益处了解较少。COVID-19 改变了我们对健康和地方在支持我们的生活质量和方式方面所起作用的认识,并揭示了当我们与地方的联系断裂时对健康和幸福所产生的负面影响。为了对围绕后 COVID-19 城市的争论有所贡献,本文探讨了地方与健康之间的内在联系;本文提出了一个概念模型,将地方资本定位为在街区范围内提高整体生活健康资本的工具。衡量地方资本的框架是根据传统的地方文献和新的地方背景文献建立的,这些文献都强调地方需要具有包容性、公平性和可持续性。该框架认为,通过在这些可衡量因素的基础上建设良好的场所,可以随着时间的推移减少医疗支出的增长和疾病的负担。
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引用次数: 0
Smart cities and the urban digital divide 智慧城市和城市数字鸿沟
Q1 ENVIRONMENTAL STUDIES Pub Date : 2023-07-13 DOI: 10.1038/s42949-023-00117-w
Andrea Caragliu, Chiara F. Del Bo
The debate on urban smartness as an instrument for managing more efficient cities has been revolving around the notion that Smart Cities might be causing an increase in inequalities. This effect would be caused by the role played in smart urban transformations by Multi-National Corporations, which would be influencing local policymakers’ agendas. In this work we empirically verify whether smart urban characteristics are associated with an increase in urban inequalities along the digital divide dimension among urban dwellers. To this aim, we exploit a large database of 181 European cities, with data on smart urban characteristics, along with measures of the digital divide obtained with the use of survey data carried out at the European Union level. Results show a negative causal relation between the level of urban smartness and the digital divide within-EU cities. Our findings are robust to a number of robustness checks.
关于将城市智能化作为管理更高效城市的工具的讨论,一直围绕着智能城市可能会导致不平等现象加剧这一观点展开。造成这种影响的原因是跨国公司在智慧城市转型中所扮演的角色,它们将影响地方决策者的议程。在这项工作中,我们通过经验验证了智慧城市的特征是否与城市居民中数字鸿沟维度的城市不平等加剧有关。为此,我们利用了一个包含 181 个欧洲城市的大型数据库,其中包含有关智慧城市特征的数据,以及利用在欧盟层面开展的调查数据获得的数字鸿沟测量值。结果显示,城市智能化水平与欧盟城市内部的数字鸿沟之间存在负因果关系。我们的研究结果经得起一系列稳健性检验。
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引用次数: 0
Emergent governance responses to shocks to critical provisioning systems 紧急治理响应关键供应系统的冲击
Q1 ENVIRONMENTAL STUDIES Pub Date : 2023-07-12 DOI: 10.1038/s42949-023-00123-y
Hallie Eakin, Ralph Hamann, Gina Ziervogel, Clifford Shearing
The structure and functioning of formal and informal governance arrangements and associated infrastructure prior to major environmental disturbance play a central role in how cities experience and respond to such events. This paper considers how city managers, businesses, and residents responded to two disturbances experienced in the City of Cape Town—a drought-induced water crisis and a pandemic crisis (COVID-19) that followed a year later—and the consequences of these actions for infrastructural assets and governance innovations. Our analysis suggests that efforts aimed at transformative change in these provisioning systems require attention to the existing and potential roles and responsibilities of private and public sector actors, as well as the associated distribution of risks and rewards. Furthermore, polycentric and decentralized governance arrangements, which are often thought to be most flexible in the face of shocks, are not always feasible or desirable to actors with a stake in resource governance.
在重大环境干扰发生之前,正式和非正式治理安排及相关基础设施的结构和功能在城市如何经历和应对此类事件中发挥着核心作用。本文探讨了城市管理者、企业和居民如何应对开普敦市经历的两次干扰--干旱引发的水危机和一年后的大流行病危机(COVID-19)--以及这些行动对基础设施资产和治理创新的影响。我们的分析表明,为实现这些供水系统的转型变革,需要关注私营和公共部门参与者现有和潜在的角色和责任,以及相关的风险和回报分配。此外,多中心和分散化的治理安排通常被认为在面对冲击时最为灵活,但对于资源治理中的利益相关者来说,这些安排并不总是可行或可取的。
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引用次数: 1
A cross-country analysis of sustainability, transport and energy poverty 可持续性、运输和能源贫困的跨国分析
Q1 ENVIRONMENTAL STUDIES Pub Date : 2023-06-30 DOI: 10.1038/s42949-023-00121-0
Dylan D. Furszyfer Del Rio, Benjamin K. Sovacool, Steve Griffiths, Aoife M. Foley, Jonathan Furszyfer Del Rio
Poverty impacts people’s choices and opportunities and can perpetuate a disadvantaged status. Poverty remains a prevalent global issue due to disproportionate wealth distribution, which often translates to inequality in energy consumption and emissions. This research investigates if low-income households and minorities from four countries with very different national cultures, contexts, and levels of wealth experience a ‘double energy vulnerability’, a concept that simultaneously positions people at heightened risk of transport and energy poverty. Our research identifies that low-income households and minorities are at higher risk of simultaneously experiencing energy and transport poverty regardless of the national context in which they live. Our study also contests the achievement of Sustainable Development Goals (SDGs) by 2030, showing that even in relatively wealthy countries, many individuals still face energy and transport poverty. We conclude that global sustainable development requires significant shifts in policy action, resource distribution and investment in social services.
贫困影响人们的选择和机会,并可能使弱势地位永久化。由于财富分配不均,贫困仍然是一个普遍的全球性问题,而财富分配不均往往会导致能源消耗和排放的不平等。本研究调查了来自四个国家的低收入家庭和少数民族是否会经历 "双重能源脆弱性",即同时面临交通和能源贫困的高风险。我们的研究发现,无论生活在哪个国家,低收入家庭和少数民族同时面临能源和交通贫困的风险都更高。我们的研究还对到 2030 年实现可持续发展目标(SDGs)提出了质疑,表明即使在相对富裕的国家,许多人仍然面临能源和交通贫困。我们的结论是,全球可持续发展需要在政策行动、资源分配和社会服务投资方面做出重大转变。
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引用次数: 1
Exploring residential built-up form typologies in Delhi: a grid-based clustering approach towards sustainable urbanisation 探索德里的住宅建筑形式类型:基于网格的集群方法实现可持续城市化
Q1 ENVIRONMENTAL STUDIES Pub Date : 2023-06-26 DOI: 10.1038/s42949-023-00112-1
Aviral Marwal, Elisabete A. Silva
Previous studies have established a significant link between urban form and sustainability. However, the diversity of micro-scale urban forms in cities in the global south has received limited attention, hindered by the lack of neighbourhood-level spatial data and maps, which poses challenges in exploring micro-urban form features. The study addresses this gap using a grid-based k-means clustering algorithm to identify residential built-up form typologies in Delhi and assess their impact on sustainable urbanisation. The algorithm clusters 100×100 metre grid cells based on their attributes of accessibility, built-up density, and street design. The results show six distinct built-up form typologies in Delhi. However, only 19% of residential areas meet the criteria for sustainable urbanisation, highlighting the need for planning interventions in most areas. The study methodology can be applied to analyse micro-scale urban form features in other cities in the global south, providing a fresh perspective on urbanisation research.
以往的研究已经确定了城市形态与可持续性之间的重要联系。然而,全球南部城市微观尺度城市形态的多样性受到的关注有限,原因是缺乏街区级空间数据和地图,这给探索微观城市形态特征带来了挑战。本研究利用基于网格的 k-means 聚类算法来识别德里的住宅建筑形式类型,并评估其对可持续城市化的影响,从而弥补了这一不足。该算法根据 100×100 米网格单元的可达性、建筑密度和街道设计等属性对其进行聚类。结果显示,德里有六种不同的建筑形态类型。然而,只有 19% 的住宅区符合可持续城市化的标准,这表明大多数地区需要进行规划干预。该研究方法可用于分析全球南部其他城市的微观尺度城市形态特征,为城市化研究提供了一个全新的视角。
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引用次数: 0
Sensemaking for entangled urban social, ecological, and technological systems in the Anthropocene 人类世中纠缠在一起的城市社会、生态和技术系统的感官制造
Q1 ENVIRONMENTAL STUDIES Pub Date : 2023-06-26 DOI: 10.1038/s42949-023-00120-1
Mikhail V. Chester, Thaddeus R. Miller, Tischa A. Muñoz-Erickson, Alysha M. Helmrich, David M. Iwaniec, Timon McPhearson, Elizabeth M. Cook, Nancy B. Grimm, Samuel A. Markolf
Our urban systems and their underlying sub-systems are designed to deliver only a narrow set of human-centered services, with little or no accounting or understanding of how actions undercut the resilience of social-ecological-technological systems (SETS). Embracing a SETS resilience perspective creates opportunities for novel approaches to adaptation and transformation in complex environments. We: i) frame urban systems through a perspective shift from control to entanglement, ii) position SETS thinking as novel sensemaking to create repertoires of responses commensurate with environmental complexity (i.e., requisite complexity), and iii) describe modes of SETS sensemaking for urban system structures and functions as basic tenets to build requisite complexity. SETS sensemaking is an undertaking to reflexively bring sustained adaptation, anticipatory futures, loose-fit design, and co-governance into organizational decision-making and to help reimagine institutional structures and processes as entangled SETS.
我们的城市系统及其底层子系统在设计时只考虑提供以人为本的一系列服务,很少或根本不考虑或不了解有关行动如何削弱社会-生态-技术系统(SETS)的复原力。从社会-生态-技术系统复原力的角度出发,为在复杂环境中采用新方法进行适应和改造创造了机会。我们:i) 通过从控制到纠缠的视角转变来构建城市系统;ii) 将社会-生态-技术系统思维定位为新颖的感知决策,以创建与环境复杂性(即必要复杂性)相适应的应对措施;iii) 描述城市系统结构和功能的社会-生态-技术系统感知决策模式,作为构建必要复杂性的基本原则。SETS感知决策是一项将持续适应、预期未来、宽松设计和共同治理引入组织决策的工作,有助于将机构结构和流程重新想象为纠缠在一起的SETS。
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引用次数: 1
Rising vulnerability of compound risk inequality to ageing and extreme heatwave exposure in global cities 全球城市日益容易受到老龄化和极端热浪影响的复合风险不平等
Q1 ENVIRONMENTAL STUDIES Pub Date : 2023-06-24 DOI: 10.1038/s42949-023-00118-9
Mingxing Chen, Liangkan Chen, Yuan Zhou, Maogui Hu, Yanpeng Jiang, Dapeng Huang, Yinghua Gong, Yue Xian
Continued warming trends lead to an increasing risk of exposure to extreme heatwaves, which threaten the health of urban residents, especially the ageing population. Here, we project the spatiotemporal trend of future exposure risk across 9188 global urban settlements between 2020 and 2100 under the shared socioeconomic pathway (SSP) 2-4.5 and SSP5-8.5 scenarios. Results show that urban heatwave exposure risk increases by 619% and 1740% for SSP2-4.5 and SSP5-8.5, respectively, and by 1642% to 5529% for the elderly. Notably, 69% of the elderly exposure risk comes from middle-income countries, where the increasing trend on the regional average is 1.2 times higher than that of high-income countries. There is an increasing trend towards greater concentration on large cities, especially in low- and lower-middle-income countries. In high-income countries, climate effects contribute 39% to 58% of increasing exposure for elderly individuals, whereas ageing effects play more prominent role in lower-income countries. This emphasizes the disproportionately higher heat-related burden for elderly individuals and inequitable trends in lower income countries. Understanding the vulnerable and priority regions in future heatwave exposure will inform adaptation strategies to support urban climate-resilient development.
持续变暖的趋势导致暴露于极端热浪的风险不断增加,威胁着城市居民的健康,尤其是老龄人口。在此,我们预测了在共同社会经济路径(SSP)2-4.5 和 SSP5-8.5 情景下,2020 年至 2100 年全球 9188 个城市住区未来暴露风险的时空趋势。结果显示,在 SSP2-4.5 和 SSP5-8.5 情景下,城市热浪暴露风险分别增加了 619% 和 1740%,老年人的热浪暴露风险增加了 1642% 至 5529%。值得注意的是,69%的老年人暴露风险来自中等收入国家,这些国家的区域平均增长趋势是高收入国家的 1.2 倍。特别是在低收入和中低收入国家,越来越多的风险集中在大城市。在高收入国家,气候影响占老年人受影响程度增加的 39%至 58%,而在低收入国家,老龄化影响的作用更为突出。这强调了老年人与高温相关的负担过重,以及低收入国家的不公平趋势。了解未来热浪暴露的易受影响地区和重点地区,将为支持城市气候适应性发展的适应战略提供信息。
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引用次数: 2
Satisfaction with urban trees associates with tree canopy cover and tree visibility around the home 对城市树木的满意度与树冠覆盖和房屋周围树木的可见度有关
Q1 ENVIRONMENTAL STUDIES Pub Date : 2023-06-23 DOI: 10.1038/s42949-023-00119-8
Camilo Ordóñez, S. M. Labib, Lincoln Chung, Tenley M. Conway
Many world cities want to expand the number of urban trees. How this expansion occurs should consider what people expect from trees based on how they experience and perceive these trees. Therefore, we need a better understanding of how people perceptually respond to urban tree abundance. This research examined whether people’s satisfaction with urban trees and satisfaction with the management of those trees were related to objective measures of greenery such as the Normalized Difference Vegetation Index (NDVI), percent tree canopy cover, and the Viewshed Greenness Visibility Index (VGVI) for trees. We used a demographically and geographically representative survey of 223 residents in Toronto, Canada, and calculated NDVI, canopy cover, and VGVI at three neighbourhood sizes. We analysed the data using generalized linear regression. We found that canopy cover and VGVI had a positive association with satisfaction with urban trees. The associations were comparatively stronger at larger neighbourhood scales than at smaller scales. There were no statistically significant associations with NDVI or satisfaction with the management of urban trees.
世界上许多城市都希望增加城市树木的数量。如何扩大城市树木的数量,应该考虑人们是如何体验和感知这些树木的。因此,我们需要更好地了解人们对城市树木数量的感知反应。本研究考察了人们对城市树木的满意度以及对这些树木管理的满意度是否与绿化的客观测量指标(如归一化差异植被指数 (NDVI)、树冠覆盖率和景观绿化可见度指数 (VGVI))有关。我们对加拿大多伦多市 223 名居民进行了具有人口和地理代表性的调查,并计算了三个社区规模的归一化差异植被指数、树冠覆盖率和 VGVI。我们使用广义线性回归对数据进行了分析。我们发现,树冠覆盖率和 VGVI 与城市树木满意度呈正相关。与较小规模的社区相比,较大规模的社区的相关性更强。净植被指数与城市树木管理满意度之间没有明显的统计学关联。
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引用次数: 0
Author Correction: Explicit and tacit knowledge have diverging urban growth patterns 作者更正:显性知识和隐性知识具有不同的城市增长模式
Q1 ENVIRONMENTAL STUDIES Pub Date : 2023-06-23 DOI: 10.1038/s42949-023-00122-z
Linzhuo Li, Nannan Zhao
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引用次数: 0
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npj urban sustainability
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