Search Results (227)

The island of Gran Canaria (Spain) has undergone a significant transformation in wildfire dynamics over the past two decades, characterized by a decline in wildfire frequency but a marked increase in the severity and spatial impact of extreme events, particularly within the wildland–urban interface (WUI). This study analyzes wildfire activity between 2000 and 2020 using official datasets and statistical trend analyses, incorporating robust severity indicators and measures of burned area concentration. Results show a statistically significant decreasing trend in the number of wildfires, while burned area is extremely concentrated in a small number of high-intensity events, with four large wildfires accounting for more than 97% of the total affected area. Climatic influences on wildfire activity were assessed through the analysis of long-term meteorological indicators, focusing on trends in extreme heat days and precipitation as proxies for thermal stress and fuel moisture availability. The results indicate a substantial modification of the background climatic framework under which wildfires develop, although no direct causal relationships are inferred. In parallel, territorial processes—such as rural abandonment, increased fuel continuity, and the expansion of dispersed housing beyond consolidated settlements—act as key amplifiers of wildfire risk. Overall, the findings highlight a transition from emergency-oriented fire suppression toward resilience-based wildfire management, emphasizing the need to integrate climate adaptation, territorial planning, and stricter land-use regulation in WUI areas. Full article

Europe’s energy transition beyond 2025 faces a resilience gap as reconfigured pipeline flows, stricter methane rules, and rising variable renewables increase the need for seasonal flexibility and system adequacy. This study examines how Ukraine’s gas transmission network and underground gas storage—among the largest in Europe—can serve as a “seasonal battery” for the EU. We integrate a policy and market review with quantitative scenarios for 2026–2030. Methods include security-of-supply indicators (the rule that the system must keep operating even if its largest single infrastructure element fails, peak-day coverage, and winter adequacy), estimates of market-accessible storage volumes and withdrawal rates for European market participants, and a techno-economic screening of hydrogen-readiness comparing repurposing with new-build options. Methane intensity constraints and compliance with monitoring, reporting, and verification and leak detection and repair requirements are applied. The results indicate that reallocating part of Europe’s seasonal balancing to Ukrainian underground gas storage can enhance resilience to extreme winter demand and liquefied natural gas price shocks, reduce price volatility and the curtailment of variable renewables, and enable phased, cost-effective hydrogen corridors via repurposable pipelines and compressors. We outline a policy roadmap specifying transparent access rules, interoperable gas quality and methane standards, and risk mitigation instruments needed to operationalise cross-border storage and hydrogen-ready investments without carbon lock-in. Full article

This study proposes a practical manual for community engagement in Positive Energy District (PED) development. It integrates evidence from three European pilot cases (Austria, Sweden, Spain). Using a dual-tier framework, it integrates an engagement framework, the Theory-of-Change (ToC) sequence for dynamic stakeholder roadmaps, with an assessment framework (an eight-aspect PED Matrix). The ToC model clarifies the socio-organizational pathway from urgency to institutionalization while the roadmaps translate these steps into actionable involvement for public, private, civil, and academic actors across top-down, bottom-up, and hybrid approaches. The proposed ToC framework is further supported by the PED Matrix, covering technology, process, environmental, financial, managerial, governance, social, and legal dimensions, which aims to ensure a holistic and target-oriented assessment using a simple 0–3 maturity scale. Guided by the central research question, “How can community engagement be systematically conceptualized, implemented, and tested throughout the PED life cycle using an integrated ToC model, stakeholder roadmap, and multi-aspect evaluation Matrix?”, this study provides practical instruments for stakeholder profiling and adaptive participation design and demonstrates application across contrasting governance, cultural, and climatic contexts. The three use cases show how engagement strategies can be tailored to secure early wins, sustain momentum, and support long-term ownership and replication. The study thus offers decision-makers and practitioners a scalable, evidence-based approach to embed inclusive participation within technical PED delivery and to strengthen the social robustness of district-scale energy transitions. Full article

The management of aging infrastructure requires a paradigm shift from routine, time-based inspections to data-driven, condition-based assessment. This paper presents a novel and practical framework for this transition through an in-depth case study of the Machico Cable-Stayed Bridge, a modern structure exhibiting accelerated deterioration driven by its aggressive marine environment. The core contribution is a replicable methodology demonstrating how to leverage a unique and disparate set of existing diagnostic data—synthesizing visual inspection reports, non-destructive evaluations, and dynamic in situ measurements—to design a targeted and optimized Structural Health Monitoring (SHM) strategy. The diagnostic analysis reveals critical pathologies, including advanced corrosion and significant discrepancies between design and measured cable forces, a finding that highlights a critical gap in historical performance data. In direct response to an official mandate for continuous monitoring, this paper proposes a multi-level SHM framework where the placement and specifications of each sensor (accelerometers, strain gauges, corrosion sensors) are directly justified by the documented failure modes. This work thus provides a practical roadmap for translating forensic data into a coherent, long-term asset management strategy, bridging the critical gap between diagnostic engineering and proactive infrastructure management. Full article

The sustainable development of agrifood systems is a pressing global challenge, highlighting the need for frameworks that guide responsible investment and community engagement. The Principles for Responsible Investment in Agriculture and Food Systems (CSA-IRA), approved by the Food Security Council in 2014, provide such a framework. Recognizing this opportunity, the FAO selected the Gesplan Research Group of the Polytechnic University of Madrid in 2016 to promote these principles in Latin America, the Caribbean, and Spain, leveraging the expertise of PhD graduates in Projects and Planning for Sustainable Rural Development. The main objective of this research was to explore how teaching, research, and civil society engagement can be integrated to operationalize CSA-IRA principles and foster sustainable development. To achieve this, the study applied the “Working with People” model across multiple countries and contexts, using university–business collaborations to implement practical, socially responsible initiatives. Over nine years, the approach generated a network of 46 universities and 52 agrifood companies across 12 countries, demonstrating effective multi-stakeholder collaboration. The accumulated experience led to the proposal of the Metauniversity—a “university of universities”—as an innovative instrument to scale knowledge transfer, research, and community engagement. These findings highlight that structured, collaborative networks can translate CSA-IRA principles into tangible actions, offering a replicable model for sustainable agrifood development globally Full article

Mediterranean cities are increasingly exposed to climate hazards, water scarcity, and social vulnerabilities, demanding integrative approaches for sustainable regeneration. This study examines how participatory governance and co-design processes can shape nature-based solutions (NbS) for climate resilience in Barrios Altos, a socially and environmentally fragile district of Lorca, Spain. Within the framework of the NATUR-W project, the interventions reimagine a degraded hillside and adjacent public spaces into a multifunctional urban forest, complemented by green retrofits of social housing and the adaptive reuse of a historic prison. Methods combined baseline community assessments, stakeholder mapping, co-design workshops, and the establishment of a multi-stakeholder governance board, ensuring inclusive participation from residents, civil society, and municipal authorities. Results demonstrate that the co-created design addressed key community priorities—such as shade provision, safe accessibility, cultural venues, and child-friendly spaces—while integrating sustainable water management systems for irrigation and stormwater control. The participatory process enhanced local ownership, balanced technical feasibility with community aspirations, and fostered governance structures that increase transparency and accountability. Overall, the study illustrates how NbS, when embedded in collaborative governance frameworks, can deliver climate, social, and cultural co-benefits while advancing resilient, inclusive, and human-scale urban environments. Full article

The use of reclaimed water is crucial to prevent pollution from wastewater discharges and mitigate the water deficit faced by irrigation districts or other non-potable water users. Therefore, the zero-discharge strategy represents a significant challenge for coastal cities affected by marine pollution from effluents. In regions such as the Mediterranean arc, agricultural areas located near these cities are increasingly exposed to reduced water allocations or rising irrigation demands due to the impacts of climate change. To address this dual challenge, a circular system is proposed through the implementation of hybrid treatment technologies that enable zero wastewater discharge into the sea. This approach would contribute up to 30 hm³ of reclaimed water annually for irrigation, covering approximately 27,000 hectares of cropland in the province of Alicante. The proposed system integrates advanced techniques, such as reverse osmosis, to ensure irrigation water quality, while also considering partial blending strategies to optimize resource use. Additionally, constructed wetlands are incorporated to regulate and treat the reject streams produced by these processes, minimizing their environmental impact. This combined strategy enhances water reuse efficiency, strengthens agricultural resilience, and provides a sustainable model for managing water resources in coastal Mediterranean regions. Full article

This article presents the ADAImpact tool, a QGIS plugin designed to assess the potential impacts of geohazards—such as landslides, subsidence, and sinkholes—using open-access surface displacement data from the European Ground Motion Service (EGMS), which is based on Sentinel-1 satellite observations. Created as part of the European RASTOOL project, ADAImpact integrates InSAR-derived ground movement data with exposure datasets (including population, infrastructure, and buildings) to support civil protection agencies in conducting risk assessments and planning emergency responses. The tool combines “Process Magnitude”, with “Exposure” metrics, quantifying the population and critical infrastructure affected, to generate potential impact maps for ground motion hazards. When applied to case studies along the Portugal–Spain border and the coastal region of Granada, Spain, ADAImpact successfully identified areas of high potential impact. These results underscore the tool’s utility in pre- and post-disaster assessment, highlighting its potential for scalability across Europe. Full article

This study examines the media coverage of illegal immigration in Spain during the first year of the war in Ukraine, focusing on the four most-read online newspapers: El Español, Okdiario, La Razón, and eldiario.es. The research aims to understand how ideological differences influence source selection and framing of immigration issues. Using Source Credibility Theory as a framework, the study analyzes the frequency of coverage and types of sources used by each outlet. A mixed-methods approach was employed, combining quantitative analysis of source frequencies with qualitative examination of content. The results reveal significant disparities in coverage and source usage among the newspapers. Conservative outlets like Okdiario relied heavily on official sources (51.5%), while the progressive eldiario.es gave more weight to civil society sources (38.2%). El Español and Okdiario published more articles on illegal immigration compared to La Razón and eldiario.es. Notably, La Razón, also conservative, used hidden sources more frequently (17%) than other outlets. The findings highlight how ideological leanings shape journalistic practices in covering sensitive topics like immigration. Conservative media’s focus on institutional narratives contrasts with progressive outlets’ emphasis on human stories, potentially influencing public perception and discourse on immigration issues. This study contributes to understanding the role of media in shaping societal attitudes towards immigration and underscores the importance of diverse perspectives in news coverage. Full article

This paper presents a detailed analysis of the severe structural anomalies that led to the urgent rehabilitation of the Eduardo Caldeira Bridge in Machico, Madeira. Situated in a challenging coastal environment with complex volcanic geology, the bridge exhibited a critical failure of its bearing devices, which were assigned the highest defect severity rating (Grade 5). A multidisciplinary diagnostic methodology, combining visual inspection data, non-destructive testing, and geotechnical analysis, was employed to identify the root causes of this degradation. The investigation concluded that the bearing failure was not due to widespread material deterioration but was directly linked to significant lateral structural displacements, exacerbated by localized geotechnical instabilities. This paper details the data-driven rehabilitation strategy that was subsequently implemented, including the complete replacement of the bearings and substructure stabilization measures. The study provides a valuable case study of a complex, mechanics-driven failure mode and demonstrates that for such critical infrastructure, a proactive management model integrating advanced technologies like Structural Health Monitoring (SHM) and Building Information Modelling (BIM) is essential for ensuring long-term safety and resilience. Full article

This cross-country study examines how higher education institutions collaborate with government, industry, and civil society to promote the European Green Deal and Just Transition initiatives. Framed within the quadruple helix (QH) model, the research investigates emerging partnerships and the integration of green policies across six European countries: Bulgaria, Cyprus, France, Greece, Serbia, and Spain. Special emphasis is placed on the strategic role of universities in advancing the environmental, social, and economic dimensions of sustainability through their initiatives. Drawing on 30 semi-structured interviews with key stakeholders, including local public officials, academics, entrepreneurs, students, and unemployed youth, the study uncovers a growing alignment between academic initiatives and national sustainability agendas. While the extent of policy integration and collaboration varies, the findings underscore the importance of universities in shaping environmental awareness, fostering green innovation, and advancing multi-actor partnerships. The study contributes to the theoretical discourse on the QH model by applying it to the field of green transition policy and offers practical recommendations for enhancing the role of universities in sustainability-oriented governance and education. Full article

This study explores the extent to which civil engineers and architects in Spain perceive sustainable leadership practices in their organizations. The main aim is to understand how leadership approaches in the built environment sector can be aligned with long-term, ethical, and stakeholder-focused principles. A total of 200 middle and senior managers participated in a survey that used a Likert-scale questionnaire that was designed to assess key elements of sustainable leadership; the various responses were analyzed in order to determine the prevalence of Honeybee-type (sustainable) versus Locust-type (short-term, exploitative) leadership traits. The findings showed that while participants generally endorse sustainable leadership values, especially regarding environmental responsibility and employee well-being, many organizations still exhibit practices associated with short-term priorities, fragmented communication, and resistance to innovation. A hybrid leadership approach seems to be quite common, considering that it combines sustainable intentions with structural or cultural barriers that limit full implementation. This study contributes to the sustainable leadership literature by providing sector-specific insights from civil engineering and architecture; it also suggests the need for organizational strategies that might strengthen internal communication, prioritize workforce development and facilitate a cultural shift toward sustainability. All the findings have serious practical implications for leadership development and for human resource practices in high-pressure technical fields. Full article

Seismic retrofitting of reinforced concrete (RC) structures is essential for improving resilience and extending service life, particularly in regions with outdated building codes. However, selecting the optimal retrofitting strategy requires balancing multiple interdependent sustainability criteria—economic, environmental, and social—under expert-based uncertainty. This study presents a fuzzy hybrid multi-criteria decision-making (MCDM) approach that combines DEMATEL, DANP, and TOPSIS to represent causal interdependencies, derive interlinked priority weights, and rank retrofit alternatives. The assessment applies three complementary life cycle-based tools—cost-based, environmental, and social sustainability analyses following LCCA, LCA, and S-LCA frameworks, respectively—to evaluate three commonly used retrofitting strategies: RC jacketing, steel jacketing, and carbon fiber-reinforced polymer (CFRP) wrapping. The fuzzy-DANP methodology enables accurate modeling of feedback among sustainability dimensions and improves expert consensus through causal mapping. The findings identify CFRP as the top-ranked alternative, primarily attributed to its enhanced performance in both environmental and social aspects. The model’s robustness is confirmed via sensitivity analysis and cross-method validation. This mathematically grounded framework offers a reproducible and interpretable tool for decision-makers in civil infrastructure, enabling sustainability-oriented retrofitting under uncertainty. Full article

Hydraulic erosion from suspended sediment is a major degradation mechanism in Francis turbines of sediment-laden rivers, especially in Andean hydropower plants. This study presents a Python3.9-based computational tool integrating the empirical Oka erosion model within a Lagrangian particle tracking framework, coupled to single-phase CFD in OpenFOAM 10. The novelty lies in a reduced-domain approach that omits the spiral casing and replicates its particle-induced swirl via a custom algorithm, lowering meshing complexity and computational cost while preserving erosion prediction accuracy. The method was applied to a full-scale Francis turbine at the San Francisco hydropower plant in Ecuador (nominal discharge 62.4 m³/s, rated output 115 MW, rotational speed 34.27 rad/s), operating under volcanic and erosive sediment loads. Maximum erosion rates reached ~1.2 × 10⁻⁴ mm³/kg, concentrated on runner blade trailing edges and guide vane pressure sides. Impact kinematics showed most collisions at near-normal angles (85°–98°, peak at 92°) and 6–9 m/s velocities, with rare 40 m/s impacts causing over 50× more loss than average. The workflow identifies critical wear zones, supports redesign and coating strategies, and offers a transferable, open-source framework for erosion assessment in turbines under diverse sediment-laden conditions. Full article

This review article synthesizes recent experimental research on the breaching of noncohesive embankment dams and levees caused by overflow, with a specific focus on coarse-grained soil materials. Despite the high incidence of embankment dam collapses leading to significant socio-economic and environmental impacts, comprehensive understanding of the underlying physical processes remains incomplete. Historically, studies have largely concentrated on embankments made from uniform materials ranging from fine cohesive soils to noncohesive clean rockfill. However, recent shifts in focus to well-graded heterogeneous coarse-grained soil materials underscore the complexity of predicting breach mechanics, given the absence of physically based models for these materials. This review aims to compile and elucidate the factors affecting breaching in an effort to inform future research and practical applications in dam safety assessments. Full article