Flooding affects Mediterranean coastal areas, with negative impacts on regional populations and ecosystems. This paper reviews the causes and consequences of coastal flooding in European Mediterranean countries, common and advanced solutions implemented to mitigate flood risk, and the importance of stakeholder involvement in developing these solutions. Climate change, intensive urbanization, tourism, deforestation, wildfires, and erosion are the main causes of coastal flooding, leading to social and economic losses, degradation of ecosystems, and water and soil contamination due to saltwater intrusion. Various measures for mitigating urban coastal flooding have been implemented, including coastal barriers, infrastructural drainage systems, wetlands, and mobile dams. Development and implementation of such solutions should be performed in close collaboration with stakeholders, but their current engagement at the coordination and/or decision-making level does not allow full integration of local knowledge in flood mitigation projects. Various processes are used to engage stakeholders in coastal flood mitigation, but participatory approaches are required to integrate their perspectives into performance analysis of potential solutions. Such approaches would allow a balance to be reached between nature conservation, market forces, stakeholder needs, and decision-makers’ priorities, resulting in development of innovative and sustainable mitigation solutions to enhance urban resilience to coastal flooding.

Many cities globally are incorporating the circular economy model into their development strategies to start transitioning as “circular cities” towards the implementation of human-centred development. In many of them, one of the major challenges is represented by the large presence of cultural heritage being in a state of degradation, abandonment and underutilization, which determines waste conditions not only at physical/spatial level but also at economic level (the presence of subsistence economies) and at a social and cultural level (marginalization phenomena and high rates of unemployment). The perspective of circular economy allows rethinking these waste conditions as an opportunity to reactivate virtuous circuits capable of promoting sustainable development focused on human needs. In this perspective, the paper aims to demonstrate both the importance of participatory approaches in guiding circular and human-centred regeneration processes and of identifying evaluation tools capable of integrating the human and ecological dimension with the economic one. With this aim, a circular methodology is proposed and experimented with in Ercolano (Italy) and in the Bronx (New York), in which the adoption of a participatory approach was central in all phases of regeneration processes, from the identification and analysis of vulnerabilities and waste conditions to the definition of a strategy capable of transforming these limitations into opportunities. A first result is the elaboration of a framework of “Human-Centred Indicators” to monitor and support the adoption of the circular economy strategy toward implementing the “human-centred city”.

The paper debates the results of a research carried out by the Department of Architecture of the University of Naples “Federico II” (DiARC), as part of the Creative Europe 2018 Artists in Architecture, Re-activating modern European houses program (entitled EACEA 32/2017 and EACEA 35/2017; scientific coordinator: Maria Rita Pinto; project manager: Serena Viola). The research investigates the relationships between creativity and sharing as tools of a new form of social sustainability. These elements can induce positive effects on the settlement qualities of the places, acting as engines of the custody of the settlement values and the collaborative regeneration of the built environment. The methodology is based on participatory approaches able to restore the levels of cohesion, care, and creativity that the experimentation typology of the Artists Residencies is able to trigger on the territory and on the communities who inhabit it. The results return in the form of the complex process of the artist exhibition reception a significant strategy of sustainable development, capable of influencing the community by entrusting it with the role of custodian of the existing heritage and of renewing local entrepreneurship with innovative productions.

In the European Green Deal and Renovation Wave framework, cities should be more self-sufficient and sustainable, promoting investment in the regeneration and maintenance of the built and natural heritage. The New European Bauhaus reinforces this vision, promoting the value of beauty as a product of environmental harmony/sustainability and participation. Many cities are already working to improve infrastructure and public services, with the aim of creating better socio-economic and environmental conditions in urbanised areas. At the same time, they aim to increase and relocate attractiveness and competitiveness to less densified rural areas, and to reduce overcrowding problems in cities. The aim is to propose a virtuous model of circular regeneration, by identifying virtuous strategies of the regeneration of rural villages capable of aligning the transformation of the built environment with climate objectives, social cohesion and local economy strengthening, and the integration of historical and identity values. Rural villages in marginal areas are left behind places. They require new economic development strategies, grounded in a circular bio-economy model for reducing/avoiding spiraled down processes. The application of European evaluation criteria to the main topic literature background allowed for the construction of a virtuous practices observatory about regenerated rural villages, which is elaborated using registry, systemic, and analytical/analysis forms. From the ex-post evaluation analysis of the case studies, it was possible to identify a number of dimensions/clusters in which investment is being made today for the regeneration of rural villages. By reasoning on the investment clusters, it was possible to identify a circular regeneration model for rural villages, transferable to other realities in order to implement the broader vision of circular settlement development. The “Rural Village Regeneration Model” represents an operational tool for regional transformation, suitable for reactivating lost connections between rural villages and larger towns in functional areas, characterised by greater self-sufficiency and exploration of the potential of digital tools to improve services, connections, infrastructure, and cooperation.

The article addresses the contemporary debate on urban and environmental regeneration, investigating the need to establish new criteria to implement the defence of coastal ecosystems by climate problems. The research looks at coastal vulnerabilities, starting with the environmental fragility of flooding, as an opportunity to regenerate waterfront ecosystems. The research aim concerns the analysis of US advanced regeneration practices to learn and transfer the principles derived from them to the European context. This transferability takes place through the construction of regeneration criteria for the coastal ecosystems rebalancing. The regeneration criteria are resulted from an ecosystem reading of the winning projects of the Rebuild by Design competition. These practices represent in the scientific literature an exceptional example of a holistic response to the problem of post-disaster intervention. These cases offer an integrated response in terms of processes, investments, the duration of the design and realization. In addition, these cases simultaneously address multiple vulnerabilities, making it possible to extrapolate from their analysis specific directions to replicate in contexts where even just one of the critical issues exist. The methodological analyses exploit the focus emerged from the scientific literature on environmental vulnerabilities, technological innovation, and stakeholder involvement. The results are regeneration criteria able to verify the appropriateness of ecosystem anti-flooding strategies. Comparing the results with the most recent US and the EU strategic documents, the regeneration criteria demonstrate their relevance and coherence with the international priorities as well as their potential transferability to the European context.

Open spaces for collective use in the built heritage of cities are the places to promote and sustain social, cultural, and economic changes. The transformation of the built environment raises awareness of following the policies and tools for the implementation of the EU New Generation Programme, redefining the framework of intervention priorities at the urban scale. Tackling the increasing physical degradation, underutilization, social disparity, and loss of the tangible and intangible culture of these types of spaces, this research identifies artistic production and social cohesion as the enabling factors of maintenance. The regeneration of areas of collective use returns an experimentation of strategic importance for the participatory and shared care of consolidated heritage contexts. The Sanità district in Naples represents a case study of a community-built custom playground, testing a co-design approach, maintaining the consolidated qualities, and awakening the responsibility of the youngest. The outcome is a circular model that focuses on the regeneration of such spaces, transforming an abandoned built environment from waste into a resource.