Urban Science

19 pages, 7055 KiB

Open AccessArticle

Are Urban Green Spaces’ Attributes Relevant to Explain the Occurrence of Invasive Species Within Urban Green Infrastructure?

by Mónica Andrade, Cláudia Fernandes and Albano Figueiredo

Urban Sci. 2025, 9(7), 260; https://doi.org/10.3390/urbansci9070260 - 4 Jul 2025

Abstract

Despite the importance of Urban Green Infrastructure (UGI) as a provider of multiple Ecosystem Services (ESs), some concerns have been raised regarding Ecosystem Disservices (EDs) associated with UGI design and management, namely, the link between Urban Green Spaces’ (UGSs) attributes and invasion spatial [...] Read more.

Despite the importance of Urban Green Infrastructure (UGI) as a provider of multiple Ecosystem Services (ESs), some concerns have been raised regarding Ecosystem Disservices (EDs) associated with UGI design and management, namely, the link between Urban Green Spaces’ (UGSs) attributes and invasion spatial patterns. This research takes the UGI of Coimbra, a medium-sized Portuguese city, as a case study to explore the relationships between UGS attributes and the occurrence of invasive plant species. The methodology involved aerial photo-interpretation and full patch survey to collect data about UGSs types, maintenance level and occurrence of invasive plant species, and landscape metrics analysis. Our results showed that the UGI of Coimbra exhibits a large prevalence of small UGSs with regular maintenance and the occurrence of invasive plant species in a low number of patches (17%). Although these patches correspond to 64% of the UGI. The area of recent sprawl (zone 2) registers higher occurrence of invasive plant species across different UGSs types, with higher prevalence in patches with no or low maintenance. Mapping the occurrence of invasive plant species in UGS is of utmost importance to implement appropriate maintenance practices, allowing medium-sized cities like Coimbra to optimize ESs associated with UGI and minimize potential EDs. Full article

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14 pages, 5485 KiB

Open AccessArticle

Immersive 3D Soundscape: Analysis of Environmental Acoustic Parameters of Historical Squares in Parma (Italy)

by Adriano Farina, Antonella Bevilacqua, Matteo Fadda, Luca Battisti, Maria Cristina Tommasino and Lamberto Tronchin

Urban Sci. 2025, 9(7), 259; https://doi.org/10.3390/urbansci9070259 - 3 Jul 2025

Abstract

Sound source localization represents one of the major challenges for soundscapes due to the dynamicity of a large variety of signals. Many applications are found related to ecosystems to study the migration process of birds and animals other than other terrestrial environments to [...] Read more.

Sound source localization represents one of the major challenges for soundscapes due to the dynamicity of a large variety of signals. Many applications are found related to ecosystems to study the migration process of birds and animals other than other terrestrial environments to survey wildlife. Other applications on sound recording are supported by sensors to detect animal movement. This paper deals with the immersive 3D soundscape by using a multi-channel spherical microphone probe, in combination with a 360° camera. The soundscape has been carried out in three Italian squares across the city of Parma. The acoustic maps obtained from the data processing detect the directivity of dynamic sound sources as typical of an urban environment. The analysis of the objective environmental parameters (like loudness, roughness, sharpness, and prominence) was conducted alongside the investigations on the historical importance of Italian squares as places for social inclusivity. A dedicated listening playback is provided by the AGORA project with a portable listening room characterized by modular unit of soundbars. Full article

(This article belongs to the Special Issue Sustainable and Resilient Affordable Housing in Architecture Design and Urban Plans)

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19 pages, 1492 KiB

Open AccessReview

Issues of Crowd Evacuation in Panic Conditions

by Mariusz Pecio

Urban Sci. 2025, 9(7), 258; https://doi.org/10.3390/urbansci9070258 - 3 Jul 2025

Abstract

This article reviews and discusses the behaviours and patterns associated with panic evacuations, as documented in the literature, which must be considered when analysing and modelling such events. This article does not take the form of a typical research article but, rather, a [...] Read more.

This article reviews and discusses the behaviours and patterns associated with panic evacuations, as documented in the literature, which must be considered when analysing and modelling such events. This article does not take the form of a typical research article but, rather, a review of previous studies alongside its own commentary. The studies analysed in this article were selected according their ability to provide a new perspective. Where possible, diverse perspectives from existing research have been contrasted with the author’s own observations and reflections. Structured as an overview, this article introduces subsequent analyses and highlights several non-intuitive questions that arose during the investigation. This study examines the relationship between movement velocity and crowd density, comparing experimental data with simulations conducted to date. It also explores the connections between flow rate, crowd density, and velocity and suggests potential directions for further research in this field. Additionally, this article addresses the loss of evacuation coordination under crowding conditions and presents studies that demonstrate optimal evacuation at speeds that differ from the so-called comfortable pace. The positive effects of strategically placed obstacles in reducing congestion and improving evacuation times are also analysed. This literature review is conducted from a practical perspective, with the primary aim of deepening our understanding of panic evacuation phenomena. Furthermore, this article categorises the impact of various phenomena associated with stampedes and panic evacuations on the requirements for safe evacuation. A tabular summary of the technical and structural measures for evacuation is provided, which may prove useful in designing effective evacuation strategies when dealing with heightened emotional states among evacuees. Full article

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16 pages, 865 KiB

Open AccessArticle

Beyond Boundaries—Genetic Implications of Urbanisation and Isolation in Eastern Grey Kangaroos (Macropus giganteus)

by Elizabeth Brunton, Alexis Levengood, Aaron Brunton, Neil Clarke, Graeme Coulson, Claire Wimpenny and Gabriel Conroy

Urban Sci. 2025, 9(7), 257; https://doi.org/10.3390/urbansci9070257 - 3 Jul 2025

Abstract

Understanding how urbanisation and habitat fragmentation influence wildlife is critical for biodiversity conservation. Fragmentation and population isolation can reduce genetic diversity, yet few studies have assessed these genetic impacts in urbanised environments. Eastern grey kangaroos (Macropus giganteus), widespread across eastern Australia, [...] Read more.

Understanding how urbanisation and habitat fragmentation influence wildlife is critical for biodiversity conservation. Fragmentation and population isolation can reduce genetic diversity, yet few studies have assessed these genetic impacts in urbanised environments. Eastern grey kangaroos (Macropus giganteus), widespread across eastern Australia, often inhabit landscapes shaped by urbanisation. Using single nucleotide polymorphism (SNP) data from scat and tissue samples, we compared genetic characteristics of kangaroo populations in urban and non-urban areas across three regions. We assessed the influence of habitat isolation on genetic diversity and relatedness at 18 study sites. Overall, urban populations did not show significantly lower genetic diversity than those in less developed areas (p > 0.05; Urban mean H_O = 0.196, Non-urban mean H_O = 0.188). However, populations fully isolated by roads, buildings, and fences exhibited reduced genetic diversity and increased inbreeding. Additionally, significant genetic differences were observed among regions. These findings suggest that while urbanisation alone may not always reduce genetic diversity, complete physical isolation poses greater risks to population genetic health. This study highlights how urban landscape features can shape the genetics of large terrestrial mammals and underscores the need for spatially informed urban planning and management strategies that maintain or restore habitat connectivity. Full article

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12 pages, 234 KiB

Open AccessArticle

Risk Perception and Self-Monitoring of Particulate Matter 2.5 (PM 2.5) Associated with Anxiety Among General Population in Urban Thailand

by Titaporn Luangwilai, Jadsada Kunno, Basmon Manomaipiboon, Witchakorn Ruamtawee and Parichat Ong-Artborirak

Urban Sci. 2025, 9(7), 256; https://doi.org/10.3390/urbansci9070256 - 3 Jul 2025

Abstract

Exposure to fine particulate matter (PM2.5) has become an increasing public health concern, particularly in urban areas facing severe air pollution. In response, individuals are increasingly turning to real-time tracking systems and self-monitoring tools. This study aimed to examine the association between PM2.5 [...] Read more.

Exposure to fine particulate matter (PM2.5) has become an increasing public health concern, particularly in urban areas facing severe air pollution. In response, individuals are increasingly turning to real-time tracking systems and self-monitoring tools. This study aimed to examine the association between PM2.5 risk perception, self-monitoring behaviors, and anxiety levels in the general population of Thailand. A cross-sectional survey was conducted during the dry season using an online questionnaire, which included the 7-item Generalized Anxiety Disorder (GAD-7) scale. A total of 921 participants residing in Bangkok and Chiang Mai were included. Binary logistic regression analysis, adjusted for sex, age, marital status, monthly income, and years of residence, revealed a significant association between anxiety and perceived health risks of PM2.5 exposure (OR = 1.09; 95% CI: 1.06–1.13). Daily self-monitoring of air quality over the past two weeks was also significantly linked to higher anxiety levels compared to non-monitoring individuals: OR = 1.92 (95% CI: 1.11–3.33) for websites, OR = 1.65 (95% CI: 1.01–2.72) for mobile apps, OR = 1.72 (95% CI: 1.12–2.64) for air purifiers, and OR = 3.34 (95% CI: 1.77–6.31) for air quality detectors. Monitoring 4–6 days per week using apps and air detectors was similarly associated with increased anxiety (OR = 1.64 and 2.30, respectively). Heightened perception of PM2.5 health risks and frequent self-monitoring behaviors are associated with increased anxiety among urban residents in Thailand. Public health interventions should consider implementing targeted alert systems during high-pollution periods and prioritize strategies to reduce PM2.5 emissions to alleviate public anxiety. Full article

15 pages, 1162 KiB

Open AccessArticle

An Automated Load Restoration Approach for Improving Load Serving Capabilities in Smart Urban Networks

by Ali Esmaeel Nezhad, Mohammad Sadegh Javadi, Farideh Ghanavati and Toktam Tavakkoli Sabour

Urban Sci. 2025, 9(7), 255; https://doi.org/10.3390/urbansci9070255 - 3 Jul 2025

Abstract

In this paper, a very fast and reliable strategy for load restoration utilizing optimal distribution feeder reconfiguration (DFR) is developed. The automated network configuration switches can improve the resilience of a microgrid (MG) equipped with a centralized and coordinated energy management system (EMS). [...] Read more.

In this paper, a very fast and reliable strategy for load restoration utilizing optimal distribution feeder reconfiguration (DFR) is developed. The automated network configuration switches can improve the resilience of a microgrid (MG) equipped with a centralized and coordinated energy management system (EMS). The EMS has the authority to reconfigure the distribution network to fulfil high priority loads in the entire network, at the lowest cost, while maintaining the voltage at desirable bounds. In the case of islanded operation, the EMS is responsible for serving the high priority loads, including the establishment of new MGs, if necessary. This paper discusses the main functionality of the EMS in both grid-connected and islanded operation modes of MGs. The proposed model is developed based on a mixed-integer quadratically constrained program (MIQCP), including an optimal power flow (OPF) problem to minimize the power losses in normal operation and the load shedding in islanded operation, while keeping voltage and capacity constraints. The proposed framework is implemented on a modified IEEE 33-bus test system and the results show that the model is fast and accurate enough to be utilized in real-life situations without a loss of accuracy. Full article

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15 pages, 4920 KiB

Open AccessArticle

Mapping Illegal Dumping Sites in a Low-Resource Region Using GIS and Remote Sensing: The Case of Blantyre City, Malawi

by Richard Lizwe Steven Mvula, Yanjanani Miston Banda, Mike Allan Njunju, Harineck Mayamiko Tholo, Chikondi Chisenga, Jabulani Nyengere, John Njalam’mano, Fasil Ejigu Eregno and Wilfred Kadewa

Urban Sci. 2025, 9(7), 254; https://doi.org/10.3390/urbansci9070254 - 2 Jul 2025

Abstract

Malawi’s Blantyre City faces escalating waste management challenges due to increased urbanization and inadequate waste collection services. This research utilized remote sensing (RS) and geographic information system (GIS) techniques to map potential illegal dump sites (PIDSs). MODIS and Sentinel-5P satellite imagery and GPS [...] Read more.

Malawi’s Blantyre City faces escalating waste management challenges due to increased urbanization and inadequate waste collection services. This research utilized remote sensing (RS) and geographic information system (GIS) techniques to map potential illegal dump sites (PIDSs). MODIS and Sentinel-5P satellite imagery and GPS locations of dumpsites were used to extract environmental and spatial variables, including land surface temperature (LST), the enhanced vegetation index (EVI), Formaldehyde (HCHO), and distances from highways, rivers, and official dumps. An analytical hierarchical process (AHP) pairwise comparison matrix was used to assign weights for the six-factor variables. Further, fuzzy logic was applied, and weighted overlay analysis was used to generate the PIDS map. The results indicated that 10.27% of the study area has a “very high” probability of illegal dumping, while only 2% exhibited a “very low” probability. Validation with field data showed that the GIS and RS were effective, as about 89% of the illegal dumping sites were identified. Zonal statistics identified rivers as the most significant contributor to PIDS identification. The findings of this study underscore the significance of mapping PIDS in low-resource regions like Blantyre, Malawi, where inadequate waste management and illegal dumping are prevalent. Future studies should consider additional factors and account for seasonal variations. Full article

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21 pages, 1723 KiB

Open AccessArticle

Transforming Chiller Plant Efficiency with SC+BAS: Case Study in a Hong Kong Shopping Mall

by Fong Ming-Lun Alan and Li Baonan Nelson

Urban Sci. 2025, 9(7), 253; https://doi.org/10.3390/urbansci9070253 - 2 Jul 2025

Abstract

The imperative for building managers, in the face of high-density urban environments, is to drive existing chiller plants to greater operational efficiency through the application of advanced technological interventions. The case for applying Supervisory Control (SC) and a Building Automation System (SC+BAS) for [...] Read more.

The imperative for building managers, in the face of high-density urban environments, is to drive existing chiller plants to greater operational efficiency through the application of advanced technological interventions. The case for applying Supervisory Control (SC) and a Building Automation System (SC+BAS) for optimizing chiller plants is the subject of investigation here, through the lens of a typical commercial shopping mall in the high-density infrastructure of Hong Kong. The application of SC+BAS falls into the realm of advanced Trim/Respond algorithms coupled with sophisticated sequencing algorithms that allow for refined optimization of the chiller operations in response to the dynamic demands of urban infrastructure. The SC+BAS features an array of optimizations specifically for the chiller plant. Incentive parameters such as cooling capacity, energy usage, and Coefficient of Performance (COP) were thoroughly studied through 12 months’ worth of data, before and after the implementation of the SC+BAS. Empirical observations indicate a statistically significant 17.6% energy usage decrease, coupled with a 15.3% decrease in the related energy expenditure costs. Furthermore, the environmental impact is calculated, with an estimated 61.1 tons reduction in the amount of CO₂ emissions, hence emphasizing the capacity for SC+BAS in offsetting the carbon footprint for commercial buildings. These data prove convincingly that the implementation of SC+BAS can increase the energy efficiency in chiller plants in commercial buildings, supporting the overall sustainability of the urban infrastructure. In turn, the authors suggest other areas for optimization through the advanced sequencing of chillers and demand-based cooling strategies. This highlights the ability of SC+BAS in creating more economical and green building operations regarding urban microclimates, occupant behavior patterns, and interactivity with the power grid, leading ultimately to the holistic optimization of chiller plant performance within the urban framework. Full article

(This article belongs to the Special Issue Optimizing Urban Building Energy Analysis and Prediction: Evidence from AI, Big Data, and Machine Learning)

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25 pages, 1745 KiB

Open AccessReview

Exploring the 15-Minutes City Concept: Global Challenges and Opportunities in Diverse Urban Contexts

by Asifa Iqbal, Humaira Nazir and Ammad Waheed Qazi

Urban Sci. 2025, 9(7), 252; https://doi.org/10.3390/urbansci9070252 - 2 Jul 2025

Abstract

The concept of the 15-minutes city [15 MC] focuses on providing important services within proximity and accessibility through active travel like walking or biking. While this model is becoming popular in urban planning and academic discourse, its implementation faces challenges in both densely [...] Read more.

The concept of the 15-minutes city [15 MC] focuses on providing important services within proximity and accessibility through active travel like walking or biking. While this model is becoming popular in urban planning and academic discourse, its implementation faces challenges in both densely populated developing and developed countries. This study aims to conduct a systematic review of recent literature to (1) identify the core components of the 15 MC model, (2) examine planning tools and strategies used in its implementation, (3) compare successes and challenges across global contexts, particularly in densely populated and resource-constrained areas, and (4) offer practical recommendations for adapting the model to meet local needs. The study reviewed 33 research papers published in the last five years [2019–2024]. Following PRISMA guidelines, a structured screening and selection process was conducted using databases such as Scopus, Web of Science, and Google Scholar. Thematic analysis revealed major challenges for implementing the 15 MC in the Global South, including urban informality, gaps in infrastructure, and complex governance issues. Moreover, the review points out the potential risks of exclusion and gentrification if the specific needs of different contexts are not considered. While high-income countries tend to focus on sustainability and making neighborhoods walkable, developing countries struggle with deeper structural problems that make equitable implementation harder. This study emphasizes the need for locally adaptive frameworks in planning 15 MCs and aims to develop inclusive urban policies that support Sustainable Development Goal 11, which seeks to make cities inclusive, safe, resilient, and sustainable. Full article

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34 pages, 1962 KiB

Open AccessArticle

Light Pollution Beyond the Visible: Insights from People’s Perspectives

by Thanos Balafoutis, Christina Skandali, Spyros Niavis, Lambros T. Doulos and Stelios C. Zerefos

Urban Sci. 2025, 9(7), 251; https://doi.org/10.3390/urbansci9070251 - 1 Jul 2025

Abstract

Light pollution, most visible in large cities through the absence of star-filled night skies, has become a growing issue of concern across many disciplines. It is not just an esthetic or astronomical problem, but a complex phenomenon with widespread effects on various sectors. [...] Read more.

Light pollution, most visible in large cities through the absence of star-filled night skies, has become a growing issue of concern across many disciplines. It is not just an esthetic or astronomical problem, but a complex phenomenon with widespread effects on various sectors. The scientific literature highlights several key areas impacted either directly or indirectly by light pollution: astronomy, ecology and biodiversity, the environment and climate change, human health and well-being, the ongoing energy crisis, economy, tourism, public safety and security, and finally politics. A survey was conducted to explore two main objectives. The first was to evaluate public awareness of light pollution, particularly how individuals perceive its impact across different societal sectors. The second objective was to consult lighting experts to obtain detailed insights into how severely each sector is affected by light pollution. The data collected from both the general public and lighting experts were analyzed and compared to provide a clearer picture of light pollution’s actual consequences. This dual-perspective approach aims to identify potential gaps between public perception and expert knowledge. Understanding these gaps is essential for shaping effective awareness campaigns and informing policy decisions. Ultimately, this research serves as a foundational step toward prioritizing mitigation strategies. By aligning scientific data with social understanding, stakeholders can develop targeted interventions that reduce light pollution’s negative effects while promoting sustainable lighting practices for the future. Full article

(This article belongs to the Special Issue Sustainable Urbanization, Regional Planning and Development)

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24 pages, 478 KiB

Open AccessArticle

Addressing Maintenance Challenges and Reputational Risks in Spanish Real Estate: A Strategic Role for Facility Managers

by Luis Eduardo Bardón Rubio and Antonio Eduardo Humero Martín

Urban Sci. 2025, 9(7), 250; https://doi.org/10.3390/urbansci9070250 - 1 Jul 2025

Abstract

This study addresses a critical deficiency in real estate management by examining how contractual arrangements between property owners and facility managers (FMs) can mitigate reputational damage arising from third-party liability incidents. While Spanish regulations impose comprehensive conservation and maintenance duties on property owners, [...] Read more.

This study addresses a critical deficiency in real estate management by examining how contractual arrangements between property owners and facility managers (FMs) can mitigate reputational damage arising from third-party liability incidents. While Spanish regulations impose comprehensive conservation and maintenance duties on property owners, current contractual frameworks inadequately protect owners from reputational risks when damages occur due to FMs’ negligence or operational failures. This conceptual study employs a systematic analysis of 16 Spanish regulations governing real estate conservation and maintenance duties, complemented by an examination of the statutory contract law and a Strengths, Weaknesses, Opportunities, and Threats (SWOT) analysis to evaluate the proposed solutions. The analysis reveals four distinct liability attribution blocks, ranging from quasi-objective owner liability to full objective installation holder liability. Current service contracts between owners and FMs provide insufficient reputational protection, as civil liability remains with the property owners regardless of the FMs’ performance. This study identifies specific contractual mechanisms—combining statutory work contracts with representative mandates and installation ownership transfers—that effectively redirect tort liability from owners to FMs. While this study focuses on Spanish regulatory frameworks as a methodologically necessary foundation for theoretical development, the conceptual framework provides transferable mechanisms for adaptation to other civil law jurisdictions. This study constitutes the first comprehensive analysis bridging legal architecture and facility management to propose novel liability transfer mechanisms within established frameworks. Full article

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32 pages, 3625 KiB

Open AccessArticle

Artificial Intelligence for Smart Cities: A Comprehensive Review Across Six Pillars and Global Case Studies

by Joel John, Rayappa David Amar Raj, Maryam Karimi, Rouzbeh Nazari, Rama Muni Reddy Yanamala and Archana Pallakonda

Urban Sci. 2025, 9(7), 249; https://doi.org/10.3390/urbansci9070249 - 1 Jul 2025

Abstract

Rapid urbanization in the twenty-first century has significantly accelerated the adoption of artificial intelligence (AI) technologies to address growing challenges in governance, mobility, energy, and urban security. This paper explores how AI is transforming smart city infrastructure, analyzing more than 92 academic publications [...] Read more.

Rapid urbanization in the twenty-first century has significantly accelerated the adoption of artificial intelligence (AI) technologies to address growing challenges in governance, mobility, energy, and urban security. This paper explores how AI is transforming smart city infrastructure, analyzing more than 92 academic publications published between 2012 and 2024. Key AI applications ranging from predictive analytics in e-governance to machine learning models in renewable energy management and autonomous mobility systems are synthesized domain-wise throughout this study. This paper highlights the benefits of AI-enabled decision making, finds current implementation barriers, and discusses the associated ethical implications. Furthermore, it presents a research agenda that stresses data interoperability, transparency, and human–AI collaboration to steer upcoming advancements in smart urban ecosystems. Full article

(This article belongs to the Special Issue Urban Water Resilience: Integrated Strategies for Sustainable, Smart, and Healthy Cities)

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16 pages, 252 KiB

Open AccessArticle

Do Rural–Urban Differences in Social Environments Act as Barriers to Social Wellbeing? A Cross-Sectional Study

by Kiffer Card and Jorge Andrés Delgado-Ron

Urban Sci. 2025, 9(7), 248; https://doi.org/10.3390/urbansci9070248 - 1 Jul 2025

Abstract

Loneliness and social isolation are pressing public health concerns, prompting interest in how rural and urban environments shape social wellbeing. However, evidence remains mixed—perhaps because loneliness is a distal psychological outcome with complex, trait-like stability. To address this, we examined geographic variation in [...] Read more.

Loneliness and social isolation are pressing public health concerns, prompting interest in how rural and urban environments shape social wellbeing. However, evidence remains mixed—perhaps because loneliness is a distal psychological outcome with complex, trait-like stability. To address this, we examined geographic variation in upstream patterns of social activity using data from the 2023 Canadian Social Connection Survey (N = 1556). The principal component analysis identified five domains of social behavior, which we analyzed using multivariable regression and supplemented with a series of sensitivity and stratified analyses. Our findings suggest that while broad differences across rural and urban geographies are modest, specific domains of behavior show some variation. For example, residents in rural areas reported lower casual social interaction (b = −0.19, p = 0.019) but similar or even greater engagement in intimate and supportive behaviors. Emotional loneliness was slightly lower in small towns (b = −0.17, p = 0.029), indicating possible protective effects of some smaller community contexts. While the overall structure of social behavior was not invariant across settings, general patterns of engagement appeared largely resilient to geographic differences. These findings underscore the importance of place-sensitive strategies that respond to specific forms of social behavior affected by geography while avoiding overgeneralized assumptions about rural–urban disparities. Full article

25 pages, 6484 KiB

Open AccessArticle

Climate Warming in the Eastern Mediterranean: A Comparative Analysis of Beirut and Zahlé (Lebanon, 1992–2024)

by Rabih Zeinaldine and Salem Dahech

Urban Sci. 2025, 9(7), 247; https://doi.org/10.3390/urbansci9070247 - 30 Jun 2025

Abstract

The Eastern Mediterranean region is experiencing accelerated climate warming, yet localized patterns remain poorly understood, particularly in areas with complex topography. This study examines long-term air temperature trends from 1992 to 2024 at two sites in Lebanon: Beirut Airport (urban–coastal) and Houch Al [...] Read more.

The Eastern Mediterranean region is experiencing accelerated climate warming, yet localized patterns remain poorly understood, particularly in areas with complex topography. This study examines long-term air temperature trends from 1992 to 2024 at two sites in Lebanon: Beirut Airport (urban–coastal) and Houch Al Oumaraa station in Zahlé (inland–valley). Using homogeneity testing, linear regression, and the Mann–Kendall trend test, we assess trends in minimum, maximum, and mean temperatures. The results show a strong and statistically significant warming trend in Beirut, with mean temperatures rising by +0.536 °C per decade and minimum temperatures showing the steepest increase (+0.575 °C/decade). In Zahlé, the warming trend is less pronounced, particularly for maximum temperatures (+0.369 °C/decade), while minimum temperatures increased by +0.528 °C/decade. Data from fixed stations and drone-based vertical profiling in Zahlé confirmed the presence of cold-air pooling and thermal inversions, which moderate air temperatures and may contribute to a subdued warming trend. The strongest inversion recorded in 2022 reached 6.7 °C between ground level and an altitude of 500 m. In contrast, the urban heat island (UHI) effect in Beirut and Zahlé appear to drive nighttime warming, particularly in summer and early autumn months. These findings highlight the roles of topography and urbanization in shaping local climate trends. Full article

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13 pages, 2159 KiB

Open AccessArticle

Tourism-Related Gentrification: The Case of Sóller (Mallorca)

by Joan Rossello-Geli

Urban Sci. 2025, 9(7), 246; https://doi.org/10.3390/urbansci9070246 - 30 Jun 2025

Abstract

The research herein presented aims to analyze the impacts of gentrification in a medium-sized Mallorca municipality because of the tourism accommodation changes. Using the available data from national and regional official sources, qualitative research is undertaken. The main findings show how gentrification has [...] Read more.

The research herein presented aims to analyze the impacts of gentrification in a medium-sized Mallorca municipality because of the tourism accommodation changes. Using the available data from national and regional official sources, qualitative research is undertaken. The main findings show how gentrification has exacerbated issues such as rising real estate prices and the loss of houses, which are nowadays devoted to tourist rentals or boutique hotels, thus not available for the local population. Another effect is a displacement of young local residents from Sóller towards other island municipalities and, finally, the presence of conflicts over the use of public spaces. Even if the local authorities already implement some measures, it is concluded that more measures should be included in order to avoid the increase in “tourismphobia” attitudes related to the gentrification process and the public space occupation. Full article

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32 pages, 7391 KiB

Open AccessArticle

An Empirical Evaluation of the Critical Population Size for “Knowledge Spillover” Cities in China: The Significance of 10 Million

by Xiaohui Gao, Qinghua Chen, Ya Zhou, Siyu Huang, Yi Shi and Xiaomeng Li

Urban Sci. 2025, 9(7), 245; https://doi.org/10.3390/urbansci9070245 - 27 Jun 2025

Abstract

In advanced countries such as the USA and China, some cities are characterized by “knowledge spillover industries”, which play crucial roles in driving innovation, entrepreneurship, and economic growth. However, the excessive expansion of megacities in China has led to the overabsorption of labour [...] Read more.

In advanced countries such as the USA and China, some cities are characterized by “knowledge spillover industries”, which play crucial roles in driving innovation, entrepreneurship, and economic growth. However, the excessive expansion of megacities in China has led to the overabsorption of labour from other cities. The unchecked growth of individual megacities causes metropolitan malaise and regional imbalance, further limiting the emergence of new “knowledge spillover” cities, which is detrimental to overall economic development. This study analyses China’s employment population structure to identify the critical population size required for the formation of “knowledge spillover” cities. The results show that 10 million is the unique threshold for which cities with populations above this size see a significant improvement in the prominence of “knowledge spillover” industries. Therefore, a population base of approximately 10 million is essential for these cities to thrive. This result suggests that China should pay more attention to the construction of urban agglomerations as geographic or administrative units to better distribute resources and promote balanced regional development. This approach can help foster the emergence of more “knowledge spillover” cities, thereby enhancing national innovation capacity and economic growth. Full article

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19 pages, 1593 KiB

Open AccessArticle

The Fragile Promise of Culture-Led Development: Lessons from Holon

by Noga Raved and Havatzelet Yahel

Urban Sci. 2025, 9(7), 244; https://doi.org/10.3390/urbansci9070244 - 27 Jun 2025

Abstract

This study examines the dynamics of culture-led urban development, focusing on the role of museums and cultural institutions in urban transformation through the case study of Holon, Israel. Reliance on public funding and political support for cultural initiatives exposed this strategy’s fragility. Political [...] Read more.

This study examines the dynamics of culture-led urban development, focusing on the role of museums and cultural institutions in urban transformation through the case study of Holon, Israel. Reliance on public funding and political support for cultural initiatives exposed this strategy’s fragility. Political transitions and budget reductions highlight the vulnerabilities of cultural institutions to shifting priorities and economic pressures. This study critically examines the interplay between cultural policy, urban branding, and community engagement, exploring how these dynamics contribute to urban renewal and the challenges that jeopardize its sustainability. Drawing on theoretical frameworks of cultural capital and place branding, the research explores how cultural investments can strengthen and destabilize cities’ socioeconomic and symbolic fabric. The study highlights the dual potential and fragility of culture-driven urban regeneration through a mixed-methods approach combining archival research, interviews, and field observations. By analyzing Holon’s trajectory, this research offers valuable insights into the potential and risks of leveraging culture for urban regeneration, emphasizing the need for resilient governance structures and diversified funding strategies to ensure the longevity of culture-led urban development. Full article

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39 pages, 10552 KiB

Open AccessArticle

An Investigation of Microclimatic Influences on Pedestrian Perception and Walking Experience in Contrasting Urban Fabrics: The Case of the Old Town and the Lower City of Béjaïa, Algeria

by Yacine Mansouri, Mohamed Elhadi Matallah, Abdelghani Attar, Waqas Ahmed Mahar and Shady Attia

Urban Sci. 2025, 9(7), 243; https://doi.org/10.3390/urbansci9070243 - 26 Jun 2025

Abstract

This study explores the impact of microclimatic variations on thermal perception and walking experience in Béjaïa, Algeria, focusing on two contrasting urban areas: the compact historic medina and the modern lower city. A mixed-method approach combined microclimatic measurements (Ta, Ts, Va, RH) with [...] Read more.

This study explores the impact of microclimatic variations on thermal perception and walking experience in Béjaïa, Algeria, focusing on two contrasting urban areas: the compact historic medina and the modern lower city. A mixed-method approach combined microclimatic measurements (Ta, Ts, Va, RH) with subjective evaluations from 70 participants. After urban morphological analysis, walking itineraries were designed and studied through accompanied walks. Participants reported their thermal sensations and walking comfort via questionnaires and mental maps, while environmental data were simultaneously collected (21–28 July 2022). Results show that transitions between urban fabrics significantly affect thermal sensation and walking thermal comfort (WTC). Strong correlations were observed between surface temperature (Ts) and sky view factor (SVF), and between ASV and WTC (Kendall’s τᵦ = 0.79, 95% CI [0.70, 0.88]). Beyond physical factors, perceptual variables like vegetation (OR = 1.50), maintenance (OR = 1.40), and views (OR = 1.30) significantly increased WTC, while fatigue (OR = 0.70) and safety concerns (OR = 0.80) reduced it. The findings highlight strong contrasts between the two areas and support planning strategies emphasizing vegetation, spatial optimization, and the integration of perceptual thermal factors in urban design. Full article

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16 pages, 936 KiB

Open AccessArticle

Navigating the Relational Dynamics of Carbon-Smart Urban Green Infrastructure (UGI) Projects

by Essi Ryymin and Outi Tahvonen

Urban Sci. 2025, 9(7), 242; https://doi.org/10.3390/urbansci9070242 - 26 Jun 2025

Abstract

Urban green infrastructure (UGI) projects rely on collaboration and involve a diverse team of professionals, including constructors, designers, green builders, and maintenance staff. This socially oriented case study focuses on the relational dynamics among UGI professionals, their roles in landscape construction processes, and [...] Read more.

Urban green infrastructure (UGI) projects rely on collaboration and involve a diverse team of professionals, including constructors, designers, green builders, and maintenance staff. This socially oriented case study focuses on the relational dynamics among UGI professionals, their roles in landscape construction processes, and how these relationships can influence the project’s success and its capacity to implement carbon-smart solutions. “Carbon-smart solutions” refers here to practices aimed at maximising carbon sequestration and storage while minimising carbon emissions. Data for this study were collected through semi-structured in-depth interviews and analysed using deductive qualitative analysis. A coding framework, investigator triangulation, and a representative sample of various professionals were employed to confirm the data’s validity. This study identified several relational factors that either challenge or drive the project’s success and carbon smartness. At the interpersonal level, the determinant drivers and challengers in UGI professionals’ relations were linked to the definition of working roles, power dynamics, the building of mutual trust through open communication, and the possession of the necessary sustainability skills. At the institutional level, relations concerning the shared principles and rationales of the project, as well as the project design process and diverse working cultures, presented both constraints and advances in project success and carbon-smart solutions. Full article

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