land Article The Social, Political, and Environmental Dimensions in Designing Urban Public Space from a Water Management Perspective: Testing European Experiences Sandra Ricart 1,2, * , Carlo Berizzi 3 , David Saurí 4 and Gaia Nerea Terlicher 3 1 Water and Territory Research Group, Interuniversity Institute of Geography, University of Alicante, 03690 San Vicente del Raspeig, Spain 2 Environmental Intelligence for Global Change Lab, Department of Electronics, Information and Bioengineering, Politecnico di Milano, 20133 Milan, Italy 3 Department of Civil Engineering and Architecture, University of Pavia, 27100 Pavia, Italy 4 Geography Department, Autonomous University of Barcelona, 08193 Barcelona, Spain * Correspondence: sandra.ricart@ua.es Abstract: Urban areas are increasingly experiencing extreme weather events, especially related to water (e.g., droughts, heatwaves, floods), which are devastatingly impacting infrastructure and human lives. Compact cities, conceived to create more robust, effective, and sustainable environments, are under pressure to increase their resilience by co-producing adaptive strategies mainly focused on the urban public space. However, public space design tends to face environmental challenges without sufficiently exploring their intersection with social issues (citizens living conditions and vulnerability) and political structures (governance). This contribution delves into how urban public space interventions are (not) moving towards achieving urban resilience in an integrated way instead of sectoral. A triple-loop approach has been developed and tested in ten urban public spaces in Citation: Ricart, S.; Berizzi, C.; European compact cities in the last 25 years. The results report how most projects reinforce the Saurí, D.; Terlicher, G.N. The Social, social dimension by promoting citizen well-being through new quality standards in public spaces, Political, and Environmental excluding some citizenry’s vulnerable segments (immigrants, women, and disabled). The political Dimensions in Designing Urban dimension reinforces hard adaptation measures to manage water resources, although increasing Public Space from a Water Management Perspective: Testing attention is put on nature-based solutions, and most projects ensure participation processes. Finally, European Experiences. Land 2022, 11, the environmental dimension is the most transversal by increasing land conversion, ensuring flooding 1575. https://doi.org/10.3390/land mitigation, and enhancing adaptive capacity. 11091575 Keywords: urban resilience; compact city; water resources; public space; social impact; urban design; Academic Editor: Nir Krakauer adaptation; climate change; sustainability; Europe Received: 21 July 2022 Accepted: 13 September 2022 Published: 15 September 2022 Publisher’s Note: MDPI stays neutral 1. Introduction with regard to jurisdictional claims in Projections show that by 2050 nearly 70% of the world’s population will live in urban published maps and institutional affil- areas [1]. Urbanization and densification processes have led to severe environmental degra- iations. dation and biodiversity loss [2,3], and their effects are maximized by climate change and the likely increase in frequency and severity of environmental hazards such as droughts, floods, and heatwaves [4], along with other climate-related hazards able to increase overall vulnerability [5–8]. Devising strategies to manage more concentrated climate hazards will Copyright: © 2022 by the authors. be especially challenging because urban areas interact with and influence climate in ways Licensee MDPI, Basel, Switzerland. that amplify (worsen) impacts and reduce urban resilience [9,10]. Since cities constitute This article is an open access article socioecological systems, combining ecology with urban planning and design has been distributed under the terms and recommended to increase urban resilience [11]. Resilience is the ability of a system to conditions of the Creative Commons recover its original equilibrium after being exposed to either gradually increasing pressures Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ or abrupt shocks, generally inducing complex non-linear interactions between the system 4.0/). components and acting across a variety of spatial and temporal scales [12]. Increasing Land 2022, 11, 1575. https://doi.org/10.3390/land11091575 https://www.mdpi.com/journal/land Land 2022, 11, 1575 2 of 24 the resilience of a system to a specific stressor (e.g., climate change) or, perhaps more appropriately, to a set of stressors (e.g., climate change + increased pollution + reduced green coverage + economic and/or pandemic crises), either correlated or independent, helps to prevent or mitigate adverse impacts, and represents a necessary objective of any management plan, especially when strategies need to be designed for particularly vulnera- ble communities and places, and trade-offs must be established between development and sustainability. In the urban planning context, resilience assessment has often been confined to a reduced number of dimensions, which in fact, only describe an idealized urban system usually from the engineering perspective, with little consideration of long-term impacts, cross-scale cascading effects, and of the overall sustainability of proposed solutions [13]. In recent years, planners have alternatively defined the urban system as the aggregation of different subsets of a broad spectrum of components across the fields of engineering, ecol- ogy, economics, geography, climate science, sociology, etc. [14], assessing their individual or collective resilience to shocks or stresses originating from climate change, socioeconomic decline, and environmental disturbances. Nevertheless, it has been argued that insufficient attention has been paid to the role of key social issues (e.g., public access to facilities, equity, justice, empowerment, disruption of vulnerable physical and virtual spaces) in determining the comprehensive resilience of the urban space, potentially giving rise to severe flaws in the proposed solutions [15]. Governments have employed different strategies to strengthen urban resilience and control rapid urban sprawl and population growth in a climate change context. One strat- egy is the “compact city”, conceived as an urban planning-based approach to creating more robust, effective, and sustainable environments [16]. Compact city policies respond to many urban issues, such as land consumption in fringe areas, energy and resource waste, air pollution, accessibility, and social segregation [17]. However, one primary constraint to compact cities (and of interest in this paper) is the low proportion of public spaces [18] and, consequently, the claim for re-thinking urban public space design [19]. In this work, public spaces refer to any parcel of land or water with some level of vegetation that is essentially devoted to an open space used for outdoor recreation. Precisely, open space constitutes the space where it is possible to promote urban development and transformation processes where the balance between the natural environment and anthropic development is recov- ered. In Western culture, public spaces are commonly understood as places accessible by all for free and without a profit motive, with the basic objective of facilitating social interaction. Furthermore, it uses “public” to refer to ownership by a national or local government body, a nongovernment body in trust for the public, or a private individual or organisation available for public use or access [20]. Urban planning decisions simultaneously determine the level of access to public spaces (including housing and other essential services) and the ability of urban areas to provide greater social welfare while lowering emissions and improving environmental quality [21]. Whether directly or indirectly, climate change impacts compact cities’ infrastructure, re- quiring specific actions to adjust urban public spaces with locational-specific solutions [22]. Traditional approaches of “grey infrastructure” (typically the human-engineered and cen- tralized water management works) have been developed to manage runoff and reduce flood risk. However, these approaches are prone to fail in building adaptive cities [23]. The uncertainty, rapid change, and complexity of compact cities require new views to address contemporary urban dynamics and ensure that long-term sustainable development can be realized [24]. Since the 1990s, many cities have progressively adopted policies to reshape urban infrastructure in order to address urban resilience, water quality, and sustainability goals [25,26]. Blue-green infrastructure (BGI), also known as nature-based solutions (NBS), has gained interest in the recent past [27]. BGI adds significant potential to the urban drainage domain to manage flood risk and mitigate other climate change impacts such as heatwaves or heat island effects while ensuring a timely and coordinated response to extreme events [28]. BGI is defined as an interconnected network of natural and designed landscape components that may include intermittent and perennial water bodies and open, Land 2022, 11, 1575 3 of 24 green spaces to provide water storage, flood control and water purification [29] to gain flexibility in the planning of urban landscapes [30]. There is increasing interest among city practitioners in using these NBS as a broad set of actions to promote human well-being in cities interested in restoring aspects of “natural” (designed as natural) ecosystem structures and/or functions [31]. More and more cities consider these solutions an integral part of their water management plans because they are cost-effective, address societal challenges, enable resource recovery and ecosystem restoration, and promote human well-being [32,33]. As a key element in building inclusive, healthy, functional, and productive cities [34], BGI targets open public spaces to provide the cities with environmental, social, economic and health benefits while ensuring liveability [35]. Likewise, public spaces and related elements are generally referred to as urban green infrastructure (UGI) and provide benefits through ecosystem services (e.g., microclimate regulation by reducing cities’ heat levels and increasing thermal comfort) [36]. By addressing pressing issues such as temperature increases, poor environmental quality, and limited social inclusion, UGI contributes to the mitigation of broader urban sustainability challenges, such as climate change impacts, outdoor recreation, and spaces for relational activity [37,38]. The spatial layout and the quality of public spaces are becoming increasingly important, emphasising the need to integrate different social groups to minimise social inequalities [39]. The World Health Organization recommends a minimum of 9 m2 green open space per person. Nearly 40% of the surface area of European cities is made up of urban green infrastructure, with around 18 m2 of publicly accessible green space per inhabitant [40]. However, national and local guidelines on adequate public space differ significantly from place to place. The variety and quality of available space are also substantial in terms of social justice, referring to how accessible public space is to users in different neighbourhoods or if public space is catering for the most vulnerable groups of city users. Indeed, it is argued that public space constitutes not only the space where the right to the city emerges; it is where it is implemented and represented, providing a key tool for social interaction [41]. In particular, elderly people, families with children, and young people are critical social groups potentially enjoying UGI and benefit from easy access [42,43]. Attention to environmental issues in compact cities has shifted from the building performance to the role of public spaces that show greater resilience and adaptive capacity: public spaces that act directly on the ground/soil and are almost always publicly owned or single managed. Local governments have an essential role—politically, economically, culturally and socially—in ensuring urban resilience through public space management [44]. The UN’s New Urban Agenda, the Agenda 2030, the Paris Agreement on Climate Change, and the Sendai Framework for Disaster Risk Reduction acknowledge the contribution that cities and local authorities play in achieving their targets. The 2030 Agenda for Sustainable Development, adopted in 2015 as a plan of action for people, the planet and prosperity, includes 17 Sustainable Development Goals (SDGs). SDG 11 is targeted explicitly at building sustainable cities and communities, making cities inclusive, safe, resilient and sustainable. In particular, Target 11.7 highlights the importance of providing green public spaces, safe, inclusive and accessible for all [45], including access to green and public spaces for all strata of society. Cities themselves also have a significant role in achieving other goals by 2030. In support of the urban agendas, cities should promote inclusiveness, equity, and liveability, besides guaranteeing an environment that stimulates social relationalities. Cities are complex systems whose infrastructural, economic, and social components are strongly interrelated and difficult to understand in isolation [46]. As dynamic systems, cities are characterised by multiple pathways of development that co-exist, being unsuitable for understanding complexity by analysing each component separately [47]. Accordingly, cities need an integrated approach to mitigating climate change, considering urban development, risk management, and citizens’ well-being. This contribution examines recent urban planning initiatives implemented in ten European cities to regenerate the urban space, adapt to climate change and improve local water management. In particular, we explore how the different strategies have been applied in practice. We attempt to verify if such Land 2022, 11, 1575 4 of 24 solutions have been generally perceived as beneficial in increasing social cohesion, public participation, and citizen engagement, besides achieving their primary environmental and climate-change adaptation goals. An evidence-based analysis of the dynamics of public urban space design, management and use is proposed to highlight positive (negative) feedback across the three dimensions (social, political and environmental). Furthermore, we evaluate if initiatives also increase (reduce) the overall well-being and the social inclusion of the resident population, thus reinforcing the original sustainability goals. 2. Materials and Methods This article conducts an evidence-based analysis of the main driving factors considered when addressing urban resilience from urban public spaces under a water management perspective. In practice, this means scaling up experiences (identified as selected case stud- ies), learning from a triple-loop approach (social, political and environmental), identifying failures and barriers in urban public space development, and exchanging new knowledge from examples at multiple geographic scales. Three research questions are formulated: • RQ1: Which type of public spaces’ design strategies and actions are promoted to increase cities’ resilience; do citizens take part in decision-making processes leading towards increased resilience? • RQ2: Can a trend towards a more comprehensive incorporation of social issues in urban designing and planning be identified? • RQ3: How do political strategies affect public space design to face climate change, and which social and environmental benefits can be expected? 2.1. Data Collection Starting from a brief literature review containing conceptual and empirical approaches regarding urban resilience and NBS (BGI), we investigated the main urban design reposito- ries with local experiences on reshaping public spaces from a water management perspec- tive. The most relevant was the Urban data Platform Plus of the European Commission (https://urban.jrc.ec.europa.eu/?lng=en&ctx=udp (accessed on 14 May 2022)), with a particular interest in “The future of cities” theme, the “Atlas of the nature” provided by the Naturvation project (https://naturvation.eu/atlas.html (accessed on 14 May 2022)), and the “Urban green blue grids for resilient cities” website (https://naturvation.eu/atlas.html (accessed on 14 May 2022)), produced by the Atelier Groenblauw, in the Netherlands. The search has been limited to the last 25 years (the period in which the grey infrastructure approach started to be contested), combining northern and southern European realities in line with the regional approach followed by the EU Adaptation Strategy and the Knowl- edge Centre for Territorial Policies initiative shared by the Joint Research Centre and the Directorate General for Regional and Urban Policy of the European Commission. Following the statement from [14] for which the value of resilience as an agenda for cities can only be assessed by considering actual examples of resilience in action, we report ten local experiences from compact cities (Table 1), asking whether and, if so, how new urban public spaces have improved urban resilience to face climate change impacts and guarantee citizen well-being. Case studies are located in compact cities promoting new or renewed public and green spaces and exemplify different typologies of actions promoted by public–private partnerships, including neighbourhoods (even “eco-city” projects), parks, corridors, and squares. Selected case studies are signatories of the Global Covenant of Mayors for Climate & Energy, the largest global alliance for city climate leadership across the globe, including near 12,000 cities, the vast majority located in Europe and mainly affected by hazards such as storm surges, pluvial coastal and river floods, heatwaves and droughts, and sweltering days. Northern case studies are in Sweden, Denmark, Netherlands, Germany, and the United Kingdom, while southern experiences include case studies from France, Italy, Greece, Spain, and Portugal. Some experiences have merited awards in recognition as forward-looking climate projects (e.g., Taasinge Square, Copenhagen, Denmark) or certified carbon neutral (e.g., Granary Square, London, UK). Land 2022, 11, 1575 5 of 24 Grey literature (e.g., technical reports) has been consulted to compare and contrast the pros and cons of each urban design project initially selected in order to ensure their richness in discussing the triple-loop approach (social, political, and environmental dimensions). Table 1. Selected 10 local experiences from compact cities. Climate Risks Scale of Case Study Location Year (Main) Intervention Augustenborg Malmö, Sweden 1998 Floods Supra-local neighbourhood Copenhagen, Floods, Taasinge Square 2013–2015 Supra-local Denmark heatwaves Benthemplein Rotterdam, Floods, heavy 2011–2013 Supra-local Square Netherlands rainfall Heatwaves, Potsdamer Platz Berlin, Germany 1997–1998 Local heavy rainfall High Granary Square, London, United 2012 temperatures, Supra-local King’s Cross Kingdom hot days High Place de la Paris, France 2010–2013 temperatures, Local République hot days Gorla Maggiore Varese, Italy 2008–2013 Floods Supra-local water park Forest fires, Pavlos Melas Thessaloniki, 2007–nowadays heat island Regional metropolitan park Greece effect Bon Pastor Floods, heavy Barcelona, Spain 1999–2012 Supra-local neighbourhood rainfall Monsanto Floods, heat Lisbon, Portugal 2009–2012 Regional green corridor island effect 2.2. Data Analysis The analysis aims not to compare the case studies per se. Instead, we explore and examine the relative importance of urban resilience’s ascribed advantages and challenges from public spaces to deepen how these translate into practical effects [48], considering the selected experiences as frontrunners in the European context. Experiences were de- scribed and compared using a triple-loop approach explored in Figure 1 to analyse the social, political, and environmental sides of urban public spaces design and planning. Each dimension has been conceptualised from desktop research starting from those items used by the three repositories described above in combination with items from secondary data (e.g., literature, reports, projects’ websites, and local and regional plans). In one case study (Bon Pastor neighbourhood), specific information has been contrasted through email and telephone interviews. Therefore, the social dimension was analysed through three compo- nents: citizen well-being, spatial benefits, and citizenry vulnerable segments; the political dimension considered four components: the strategy plan, urban planning, governance and participation, and financing; and the environmental dimension was defined following three components: biodiversity, water management, and climate change (resilience). Land 2022, 11, 1575 6 of 24 Land 2022, 11, x FOR PEER REVIEW 6 of 24 Figure 1. A triple-loop approach of urban resilience based on social, political and environmental Figure 1. A triple-loop dimensions. approachSource: of urban resilience Own elaboration from based onmentioned repositories social, in political andplus data collection environmental secondary data and own reformulation. dimensions. Source: Own elaboration from repositories mentioned in data collection plus secondary data and own reformulation. Each dimension and the related components have been analysed by applying a causal loop diagram (CLD). CLDs are subfields of system dynamics able to qualitatively visual- ise the assumptions of a mental model of a complex system such as urban resilience. The Each dimension and the related components have been analysed by applying a causal four basic elements of the CLD are the variables, the links between them, the signs on the loop diagram (CLD). CLDs are show links (which subfields how theof system variables dynamics able are interconnected), to qualitatively and the sign of the loop (whichvisualise the assumptions of ashows mentalwhat model type of behaviour the system will of a complex produce). system This framework such as urban aims to represent The resilience. a problem or issue from a causal perspective, so managers can become more aware of the four basic elements ofstructural the CLD arethat forces the variables, produce puzzlingthe links between behaviour. CLD helps to them, capturethe andsigns map the on the links (which show how the cause–effect leading variableschains are interconnected), between pairs of variables andand the signthose identify of the loop system (which loops affecting its evolution, acting as driving factors of each urban system’s interdependency. shows what type of behaviour the system will produce). This framework aims to represent For the present work, CLD provides a straightforward graphical representation of the a problem or issue from mostarelevant causalvariables perspective, so managers and interactions can become between dimensions more aware and components by apply-of the structural forces thating a criteria selection produce puzzling for which only those variables behaviour. CLD helpsidentified toincapture at least halfand of the map case the studies are considered. The strength of connections between elements is represented leading cause–effect chains between through different pairsand thicknesses ofcolours. variables Delaysand identify relative to the timethosehorizonsystem of the con-loops affecting its evolution, acting nection as be can also driving factors used (a symbol, //, isof puteach on the urban arrow). Thesystem’s direction ofinterdependency. the connections For the present work, between CLD providessuch variables defines the causal polarity, being positive (+) if the variables a straightforward graphical representation of the most change in the same direction (i.e., they both increase or decrease) or negative (−) if they relevant variables and interactions between change in the opposite direction [49]. dimensions Combinationsand components of positive and negativeby applying causal rela- a tionships criteria selection for which can form only those either reinforcingidentified variables (‘R’) or balancing in at(‘B’) feedback least half loops. of the Reinforcing case studies loops represent growing or declining actions, while balancing loops indicate a mechanism are considered. The of strength of connections self-correction between that contrasts and opposes elements the change. Hence,is theirrepresented analysis is crucial through to different thicknesses and colours. describe Delays the expected relative dynamic evolution toofthe time The variables. horizon of the of main limitation connection the CLD in can its present form is that “elements” have no quantitative or even ordinal values. It is essen- also be used (a symbol, //, is put on the arrow). The direction of the connections between tially a static representation of the interactions between the elements, while real systems such variables definesdisplay the causal polarity, interesting beingever-changing and sometimes positive (+) if the patterns variables in time change [50]. However, CLDin the servesboth same direction (i.e., they many different increase purposes from a qualitative or decrease) perspective(− or negative as )theiffirst they stepchange for furtherin the analysis (e.g., quantitative mathematical model): (1) as a heuristic tool that supports and opposite direction [49]. Combinations promotes of positive meaningful conversation amongand negative experts causal to develop new relationships questions and hypoth- can form either reinforcing (‘R’) eses or balancing for data gathering and(‘B’) theoryfeedback building, (2)loops. Reinforcing a knowledge management loops represent tool that or- ganises the available knowledge in an integrative way and illustrates how individual growing or declining actions, while balancing loops indicate a mechanism of self-correction that contrasts and opposes the change. Hence, their analysis is crucial to describe the expected dynamic evolution of variables. The main limitation of the CLD in its present form is that “elements” have no quantitative or even ordinal values. It is essentially a static representation of the interactions between the elements, while real systems display interesting and sometimes ever-changing patterns in time [50]. However, CLD serves many different purposes from a qualitative perspective as the first step for further analysis (e.g., quantitative mathematical model): (1) as a heuristic tool that supports and promotes meaningful conversation among experts to develop new questions and hypotheses for data gathering and theory building, (2) a knowledge management tool that organises the available knowledge in an integrative way and illustrates how individual elements and groups of elements fit into large-scale structures of the system, and (3) a diagnostic tool that helps to identify potential gaps in current policy approaches. Finally, a SWOT analysis has been applied as a cognitive process studying the interre- lations between internal and external surroundings of each experience, based on a mixed (subjective–objective) evaluation of strengths, weaknesses, opportunities and threats [51]. SWOT is a tool used for strategic planning and management in contexts (e.g., cities) inter- Land 2022, 11, x FOR PEER REVIEW 7 of 24 Land 2022, 11, 1575 7 of 24 elements and groups of elements fit into large-scale structures of the system, and (3) a diagnostic tool that helps to identify potential gaps in current policy approaches. Finally, a SWOT analysis has been applied as a cognitive process studying the inter- acting with relations their environments between to sizesurroundings internal and external up their capabilities and deficiencies of each experience, based onby a considering mixed (subjective–objective) internal evaluation of strengths, (“Strengths” and “Weaknesses”) weaknesses, and external opportunities and (“Opportunities” and “Threats”) threats [51]. drivers. SWOT In our is a tool study, theused SWOT for strategic is used planning and management to evaluate and discussinthe contexts (e.g.,and negative positive cities) interacting with their environments to size up their capabilities and deficiencies by learnings of the compared experiences, in which “Strengths” refer to positive, favourable considering internal (“Strengths” and “Weaknesses”) and external (“Opportunities” and characteristics through which the project provides advantages for urban resilience, “Weak- “Threats”) drivers. In our study, the SWOT is used to evaluate and discuss the positive nesses” highlight and negative learnings limitations or barriers of the compared impeding experiences, effective in which adaptation, “Strengths” “Opportunities” refer to posi- are tive,driving favourableforces to neutralize characteristics throughinternal environmental which the project provides constraints, advantages forwhile urban“Threats” are disadvantageous resilience, “Weaknesses”situations to reach highlight urban limitations resilience. or barriers Thiseffective impeding is an effective tool; therefore, adaptation, “Opportunities” politicians, are driving managers, forces to neutralize promoters, citizens, internal environmental and other constraints, while urban development stakeholders can “Threats” are disadvantageous use its research results. situations to reach urban resilience. This is an effective tool; therefore, politicians, managers, promoters, citizens, and other urban development stakeholders can use its research results. 3. Experiences The 10 selected case studies (Figure 2), differentiated according to their geographical 3. Experiences location The (Northern or Southern 10 selected case Europe), studies (Figure are detailed 2), differentiated and described according according to the year to their geographical oflocation their development, the developer(s), (Northern or Southern the goal Europe), are detailed andof the project, described andtothe according themain year works and of their development, measures to promotethe developer(s), sustainable the goal urban of the project, planning. Functionsand and the main works and recognition (awards) have measures also to promote sustainable urban planning. Functions and recognition (awards) been specified. have also been specified. Figure 2. Geographical location and design of the case studies. Source: Own elaboration from d- Figure 2. Geographical maps.com (accessed on 4 location and June 2022) anddesign ofby pictures thethe case studies.Climate European Source: Own elaboration Adaptation Platform, from d-maps. com (accessed on 4 June 2022) and pictures by the European Climate Adaptation Platform, Climate- ADAPT, GRaBS Project (Augustenborg neighbourhood, Malmo, Sweden); State of Green (Taasinge Square, Copenhagen, Denmark); PublicSpace.org (accessed on 4 June 2022), CCCB (Benthemplein Square, Rotterdam, Netherlands); Atelier Dreiseitl (Potsdamer Platz, Berlin, Germany); King’s Cross Business Partnership Limited (Granary Square-King’s Cross, London, United Kingdom); Architizer.com (accessed on 5 June 2022) (Place de la République, Paris, France); EU OpenNESS project (Gorla Maggiore water park, Varese, Italy); EU Connecting Nature project (Pavlos Melas metropolitan park, Thessaloniki, Greece); [52] (Bon Pastor neighbourhood, Barcelona, Spain); Architects Council of Europe (Monsanto green corridor, Lisbon, Portugal). Land 2022, 11, 1575 8 of 24 3.1. Northern European Case Studies 3.1.1. Sweden: Augustenborg Neighbourhood (Malmö) During the 1980s and 1990s, the neighbourhood of Augustenborg (about 3500 inhabi- tants) in Malmö, frequently flooded by a faulty drainage system, was undergoing social and economic decline. In 1998, the “Eco-City Augustenborg” project was developed by MKB company and the City of Malmö to improve the neighbourhood’s social, economic, and ecological conditions after being affected by unemployment and other social problems. Flood mitigation measures in the form of sustainable drainage systems (ponds, canals, and green roofs) were included as part of the urban renewal project, which sought to create public spaces amenable to social relations by neighbours and visitors. Rainwater from roofs, roads and car parks was channelled through trenches, ditches, ponds and wetlands, with only surpluses being directed into a conventional sewer system. Green roofs were installed on all developments built after 1998 and retrofitted on more than 11,000 m2 rooftops on ex- isting buildings. By promoting the social side of environmental planning, the project could overcome the limitations of acting to benefit ecological sustainability alone and incorporate the concerns raised by neighbours and park visitors. Hence, blue and green infrastructure could be adapted to the relational needs of the community while still performing essential flood control tasks. The project won the UN World Habitat Award in 2010. 3.1.2. Denmark: Taasinge Square (Copenhagen) The project developed by GHB Landscape Architects in Taasigne Square aimed to create a green space with high soil permeability to protect the area from local flooding and improve thermal comfort. In addition, the square became a space for neighbourhood and artistic initiatives. Taasigne Square was developed after a dialogue with residents, and an asphalt area of 1000 m2 was adapted and reorganized to their needs. The project exploited the potential of the green-blue infrastructure by introducing innovative irrigation systems to maintain the surrounding greenery. A large amount of greenery has been introduced, which increases biodiversity in the city and allows water to infiltrate and relieve the city’s sewage system. Permeable soil is used to absorb excess rainwater during extreme weather conditions, transforming the square into an urban pond. The square is part of a long-term strategic plan to transform the entire Sankt Kjelds and Bryggervangen districts, with about 24,000 inhabitants, as the Copenhagen municipality’s largest and greenest cloudburst adaptation project to date. Taasige Square was built between 2013 and 2015, and it was awarded as the first climate-resilient urban space in Copenhagen. 3.1.3. Netherlands: Benthemplein Square (Rotterdam) Developed by De Urbanisten, the Benthemplein Square project aims to counteract flooding, heavy rainfall and the heat island effect. The concrete square, lying between Agniesebuurt, a densely populated neighbourhood (about 4300 inhabitants) dating from the nineteenth century, and the modern centre of Rotterdam, was transformed by introducing various levels and a green-blue infrastructure. The square collects and stores rainwater from roofs of buildings and sidewalks to reuse during dry periods and relieve the sewer system during periods of extreme rain. The water is collected using pipes and steel gutters running along the area. The entire project consists of three basins of different heights that collect up to 1700 m3 . The deepest basin is a multi-purpose sports field surrounded by stepped grandstands. Additionally, a self-irrigating water system was included to maintain the green areas introduced into the square. The design process considered the needs and expectations of the local community, residents, the surrounding school and even the church. It was decided that the place should be dynamic, with many play and recreational spaces where water will be a visible element. Benthemplein Square is the first full-size water playground in Rotterdam and includes an outdoor sports area, green areas and even a theatre for tourists and residents. Work on the project began in 2011, and the square was completed in 2013, receiving the Rotterdam Architecture Award in 2014. Land 2022, 11, 1575 9 of 24 3.1.4. Germany: Potsdamer Platz (Berlin) The Potsdamer Platz site is located between de Spree river and the Landwehr canal, south of the Tiergarten Park in the Mitte district (about 383,000 inhabitants), in the centre of Berlin. The project to reformulate this iconic space, conducted by Atelier Dreiseitl in 1997–1998, was modelled after a nature concept: to act as a connector between the Landwehr canal and the buildings on the site while defining the public space. A series of urban pools have been built in a combined waterscape of approximately 1.2 ha. The scale, the inner-city location, and the integration of ecological, aesthetic, and civil-engineering functions are combined to face a twofold purpose: (1) to achieve zero rainwater runoff despite the high degree of sealing while including water as a design element, and (2) to improve the urban climate, lowing the ambient temperature in summer, binding dust particles, and humidifying the air. Rainwater from the roofs of the surrounding buildings is captured in large underground cisterns and used for topping up the pools, flushing toilets in offices, irrigating green areas, and fire system need. The water features improve the urban climate since the water slightly lowers the ambient temperature in summer, binds dust particles, and humidifies the air. The benefit of the water system is threefold: the rainwater is contained; less drinking water is used, and a pleasant outdoor space has been created. The project was awarded the DGNB Silver Sustainable Urban District in 2011. 3.1.5. United Kingdom: Granary Square, King’s Cross (London) Granary Square is the centrepiece of the King’s Cross master plan. The space is located in front of the historic Granary building (1852) designed by Lewis Cubitt in the King’s Cross district (about 45,000 inhabitants). It was formerly the canal basin where boats were moored and unloaded. The project to renovate the space was carried out by Townshend Landscape Architects, the Fountain Workshop, and Speirs Major and aimed to re-think urban building and water nexus as part of the King’s Cross redevelopment initiative started in 1998. The square features four fountain complexes with some 1080 individual jets, making it one of the most significant water features in Europe. The location of the fountains reflects the historic canal basin and the position of each of the four fountain complexes relates to the façade of the Granary building. The fountains have been designed to be turned off during large events, and the paving around them has been shaped to allow a layer of water to be poured over them to create reflecting pools. The fountains also have the function of spraying a mist hovering above the ground, which cools the environment on hot days and helps to combat the heat island effect. During the revitalization, historical elements such as the bases of the cranes and the railroad tracks were left behind. The space opened in 2012, revitalizing the area through the generated pedestrian traffic. The project was awarded the 2014 Camden Design Award. 3.2. Southern Europe Case Studies 3.2.1. France: Place de la République (Paris) The redevelopment of Place de la République is based on the concept of an open space with multiple urban uses with an emphasis on creating a place that is not a heat island. The project, developed by TVK, aims to create a vast landscape of about 33,600 m2 (120 m × 280 m) to become a multifunctional square adapted for different uses and directly benefiting more than 266,000 inhabitants (those located in the border between the 3rd, 10th and 11th districts). The reconstruction of the intersection and removal of the traffic circle frees the site from the dominant automobile. The Place focuses on pedestrian and bicycle traffic, connecting boulevards with tree rows forming a harmonious axis. In order to avoid a heat island effect, the square introduced blue infrastructure, including a 276 m2 reflecting pool and sprays, as a climatic, social, recreational, and aesthetic urban strategy. This square is now a new centre of attraction, exchange and meeting place. Two terraces integrated into the continuity of the square invite people to sit down and relax. At the southwest corner of the square is a 162 m2 pavilion designed by TVK. The building is glazed over its entire surface to maintain the impression of continuity of the entire space. Work on the project began in 2010 with the Land 2022, 11, 1575 10 of 24 cooperation of residents, and the final result was completed in 2013. The project was a finalist at the European Prize for Urban Public Space. 3.2.2. Italy: Gorla Maggiore Water Park (Varese) Begun in 2008 and inaugurated in 2013, the water park covers a green recreational area adjacent to the Olona River. The project, developed by IRIDRA, includes a set of constructed wetlands in about 6.5 ha previously used for poplar plantation. The park is situated within the municipality of Gorla Maggiore, with about 5000 inhabitants, and is located in the province of Varese. The project’s primary aim was to protect against flooding, keep pollution in check, and test the feasibility of a green infrastructure to treat sewage overflows. However, the wetland was designed to be multipurpose, exploiting public recreational areas and biodiversity increases. Built on the banks of the Olona river, the water park includes (a) a pollutant removal area composed of a grid, a sedimentation tank, and four vertical sub-surface flow constructed wetlands; (b) a multipurpose area with a surface flow constructed wetland or pond with multiple roles (including the management of blue areas); and (c) a recreational park with restored riparian trees, green open space, walking and cycling paths and some services (e.g., picnic tables, toilets, bar) maintained by a voluntary association. In 2017, the project wins the Premio per lo Sviluppo Sostenibile (Sustainable Development Award). 3.2.3. Greece: Pavlos Melas Metropolitan Park (Thessaloniki) This lively project, developed by the municipality of Pavlos Melas in consultancy with Nikiforidis-Cuomo Architects, aims the transition of a former military camp (used during the Nazi occupation as a concentration and execution camp) into a metropolitan park which maintains the community memory and local identity. The absence of an urban planning system and public housing policies during the fifties to seventies resulted in a spontaneous- arbitrary built environment without public open and green space. Located in Pavlos Melas, a municipality of about 100,000 inhabitants on the northwest side of Thessaloniki, the area has been largely abandoned since 2006. The municipality has promoted strategic regeneration planning based on different steps and procedures to reverse the situation, with increased dialogue and cooperation of key stakeholders. The area corresponds to 35 ha and comprises 63 buildings. The municipality is embarking on the restoration of the park across several phases. Phase one will concentrate on restoring the park’s green spaces by incorporating knowledge of ecology and urban planning into the conception of the ecosystem. Additional benefits of the Pavlos Melas metropolitan park are preventing forest fires and reducing unemployment (Pavlos Melas is among the 17 municipalities with the highest percentage of unemployment in Greece). 3.2.4. Spain: Bon Pastor Neighbourhood (Barcelona) The Bon Pastor neighbourhood, currently about 13,000 inhabitants and located on the Eastern outskirts of Barcelona, originated in the 1920s as a social housing project composed of very small, cheaply built individual units (37 to 54 m2 ), which deteriorated over the years. In 1999, the Barcelona City Council, through the Municipal Institute of Urbanism, decided to substitute these units with modern blocks with larger flats and rearrange the whole neighbourhood with new green space. The project aims to collect stormwater using different types of SUDSs to mitigate flooding since, in the past, various areas were affected by excess urban runoff. Authored by landscape architect Roberto Soto, in 2012, SUDS (mainly in the form of rain gardens) were introduced between the new blocks to provide alternative drainage and enhance urban biodiversity. Hollowed gardens were used as collection points in the closed areas between the apartment blocks (22,000 m2 ). An important feature was that local community groups participated in designing, planning, and maintaining these systems, although some doubts were raised as neighbours were unfamiliar with SUDS. The project received the Premi d’Habitatge Social de Catalunya (Catalan Social Housing Award) in 2009. Land 2022, 11, 1575 11 of 24 3.2.5. Portugal: Monsanto Green Corridor (Lisboa) Over many decades, Lisbon has faced aggressive urban development in its peripheral neighbourhoods. Creating new green spaces and connecting them through green corridors has been prioritized to improve citizens’ quality of life and increase the city’s resilience to climate change. About 190 ha of new green areas and six green corridors were created between 2009 and 2017 through the municipality of Lisbon’s intervention. The Monsanto green corridor was completed in 2012 as a 2.5 km long stretch connecting the Monsanto forest park with the centre of Lisbon through the park of Eduardo VII. The corridor is structured in the form of successive green spaces aimed at bringing nature into the city to provide relief against heatwaves and the heat island effect, control flooding, diminish air pollution, and improve the distribution of green space along the corridor. It is expected that the Monsanto green corridor creates an ecological matrix articulated by four main aspects: human mobility; the circulation of air and water; the transition area between fluvial and estuarine environments, and several ecosystem units, including drought-adapted grasslands and a horticultural garden. This ecological matrix is intended to contribute to social cohesion and improve the welfare of children and young people by facilitating family visits. The project was included in the Lisbon application form for the European Green Capital Award 2020. 4. Results 4.1. The Social Dimension The social dimension clearly shows a gap between the citizen well-being (W1–W6) and spatial benefits (S1–S4) components and the citizenry vulnerable segments component (V1–V7), the latter being the less considered (Table 2). In particular, no project explicitly recognises immigrants, women, and people with special needs (codes V3, V4, and V5, respectively). In contrast, citizen well-being and spatial benefits represent the primary goals of all projects. Inside these two components, all case studies demonstrate sensitivity to quality space and accessibility (S1, W2). Most cases reflect the importance of urban design to create public spaces for citizens and allow easy access for pedestrians. In particular, Benthemplein Square and Place de la République limited car traffic to improve slow mobility creating public spaces car-free; the Metropolitan Park in Greece introduced a cycle path to induce people to move in an alternative way (S2). The search for accessible and quality spaces promotes, in almost all cases, social cohesion (W1), except in the Bon Pastor neighbourhood in Barcelona. Most projects in which recreational activities (W3) are promoted are small-scale, such as Taasinge and Benthemplein squares, providing health benefits and enhancing education (W6, W4). However, these variables are not considered in larger-scale projects such as urban parks or neighbourhood projects. Citizen vulnerability is addressed in a few projects: the elderly (V1) in the Bon Pastor neighbourhood, children and teenagers (V2) in Benthemplein Square and Gorla Maggiore water park, and residents (V6) in Taasinge Square. However, some projects identified other vulnerable segments (V7), such as the unemployed (Augustenborg neighbourhood) and families (Pavlos Melas metropolitan park). The Benthemplein Square constitutes the case responding to most of the variables anal- ysed, touching on all three dimensions: it considers all variables of the citizen well-being component, except for ensuring security (W5) and all spatial benefit(s) components (S1–S4). Likewise, other experiences (e.g., Taasinge Square, Granary square, Place de la République and Pavlos Melas metropolitan park) would comply with most of the components of the three dimensions. Instead, the Monsanto green corridor demonstrates less sensitivity to social aspects even though there is a clear expression of creating interesting quality spaces (S1). It is followed by the Augustenborg neighbourhood, which, despite being of a different nature from the Monsanto green corridor, expresses the same characteristics. However, what makes this project unique is the consideration of citizenry vulnerability, to which the project aims to respond. Again, the case studies are geographically mixed: one from north- ern Europe and one from southern Europe. The security aspect (W5), a relevant attribute in Land 2022, 11, 1575 12 of 24 terms of gender, is never considered even though citizen well-being was recognised as one of the main objectives for all case studies, showing a gap in this aspect of social issues that constitutes a relevant variable, especially when designing the public space. Table 2. The social dimension in case studies. Social Citizen Well-Being Spatial Benefit(s) Citizenry Vulnerable Segments Dimension Case Study W1 W2 W3 W4 W5 W6 S1 S2 S3 S4 V1 V2 V3 V4 V5 V6 V7 Augustenborg √ √ √ √ − − − − − − − − − − − − − neighbourhood √ √ √ √ √ √ √ √ Taasinge Square − − − − − − − − − √ √ √ √ √ √ √ √ √ √ Benthemplein Square − − − − − − √ √ √ √ √ √ Potsdamer Platz − − − − − − − − − − − Granary √ √ √ √ √ √ √ √ − − − − − − − − − Square-King’s Cross Place de la √ √ √ √ √ √ √ √ − − − − − − − − − République Gorla Maggiore √ √ √ √ √ √ √ − − − − − − − − − − water park Pavlos Melas √ √ √ √ √ √ √ √ √ − − − − − − − − metropolitan park Bon Pastor √ √ √ √ − − − − − − − − − − − − − neighbourhood Monsanto √ √ √ − − − − − − − − − − − − − − green corridor Codes: W1, build-improve social cohesions; W2, promote-increase access to urban spaces; W3, encourage recreation and exercise; W4, enhance education; W5, ensure security; W6, provide health benefits; S1, create quality space; S2, improve slow mobility; S3, context sensibility; S4, places to stay; V1, elderly; V2, children and teenagers; V3, immigrants; V4, women; V5, people with special needs; V6, residents; V7, other(s). 4.2. The Political Dimension The selected projects have been developed as part of a strategy or plan that can be specific to the affected area or framed in a more ambitious project (P1, P2) (Table 3). Most experiences are planned as renewal initiatives (Augustenborg neighbourhood, Potsdamer Platz, Place de la République, and Bon Pastor neighbourhood). However, other projects have been promoted as part of master plans (Granary Square-King’s Cross, and Monsanto green corridor), climate change adaptation plans (Taasinge and Benthemplein squares), re- gional plans (Gorla Maggiore water park) or European projects (Pavlos Melas metropolitan park). The projects attempt to reinforce those actions (A1, A2) based on hard adaptation measures to manage water resources (e.g., ponds, canals, fountains, sewers), but also introduce some examples of soft adaptation measures, such as BGI (e.g., sustainable ur- ban drainage systems in Bon Pastor or building constructed wetlands in Gorla Maggiore water park) or UGI (e.g., planting trees and plants in Place de la République and con- necting green spaces in Monsanto green corridor). These patterns are independent of the framework in which experiences have been developed (and without specific geographical differences). Interestingly, some actions to redesign urban planning go beyond decision- making and political aspects to circumscribe social aspects, such as educational, sports or cultural facilities at a large scale (Pavlos Melas metropolitan park) or the local scale through playful–recreational activities (Benthemplein Square). Land 2022, 11, 1575 13 of 24 Table 3. The political dimension in case studies: Strategies and urban planning. Political Strategy/Plan Urban Planning Dimension Case Study P1 P2 A1 A2 Creation of a flood-resilient district Plan for the renewal of Augustenborg based on ponds, canals, Augusternborg − − neighbourhood and green roofs as part neighbourhood of a larger operation of urban renewal Long-term strategy: the Part of Copenhagen’s Control and retain transformation of the Climate Adaption Plan rainwater from roofs whole neighbourhood Introducing green and Taasinge Square and Copenhagen and streets locally, of Skt. Kjelds, which is blue infrastructure Cloudburst delaying the water flow to become The Climatic Management Plan to the sewers Quarter in Copenhagen Creation of a “water square” with the dual The Rotterdam function of collecting approach started in Rotterdam Climate Benthemplein Square rainwater and − 2008 as Rotterdam Initiative (RCI) developing the area Climate Proof (playful-recreational activities) Rainwater from 19 Plan to reunify the city buildings’ green Plan to create a after the intervening rooftops is collected Potsdamer Platz European-like city − fall of the Berlin Wall in year-round in three quarter Nov. 1989 large underground cisterns Voted by the public to Subterranean fountain win a Camden plant rooms run day Granary Square-King’s Part of the King’s Cross Planning Award for and night to create an − Cross Masterplan “Best New Public urban beach Space” in 2014 framework Plan to regenerate and improve life quality in the four Maximizing the neighbourhoods Place de la proportion of trees and opening onto it, − − République plants to increase Arts-et-Métiers, ventilation Enfants-Rouges, Porte-Saint-Martin and Folie-Méricourt River Contract of the Olona-Bozzente-Lura (2003) to (1) reduce water pollution; (2) reduce flood risk; Rete Ecologica (3) restore the A park on the shore of Gorla Maggiore Regionale Plan landscape, Constructed the Olona River in an water park (Ecological Network environmental and wetlands (CWs) area previously used Regional Plan) urban systems relative for poplar plantation to river corridors; and (4) sharing of information and knowledge on water resources management Land 2022, 11, 1575 14 of 24 Table 3. Cont. Political Strategy/Plan Urban Planning Dimension Case Study P1 P2 A1 A2 26 buildings of the former camp will be restored to house Part of the “Connecting educational, sports and The creation of four Nature” project funded Long-term Strategic cultural facilities; outdoor parking lots, Pavlos Melas by the European Action Plan for public gathering spaces; an underground metropolitan park Commission’s Horizon Thessaloniki offices, leisure and parking lot, sidewalks 2020 (ID grant commercial venues; and a cycling network agreement 730222) small-scale trade fair facilities; and tourist accommodation units Substitution of former low-income housing (units of 30 m2 built in the late 1920s) for Plan for the renewal of apartment blocks to Bon Pastor the Bon Pastor − reinforce sustainable neighbourhood neighbourhood urban drainage systems (SUDs) and green infrastructure (vegetation planting, permeable pavement) A continuous natural Part of a Master structure based on a Plan for the creation of Monsanto Development Plan coordinated set of the Monsanto − green corridor created by the city of green spaces connected ecological corridor Lisbon via pedestrian and cycling paths Codes: P1, plan name; P2, strategy; A1, action 1; A2, action 2. All experiences followed a bottom-up approach (G1), although some of them only partially (Potsdamer Platz and Monsanto green corridor) (Table 4). The mechanisms used to guarantee and reinforce participation (G2) are not visible in some experiences (Benthemplein Square, Potsdamer Platz, and Monsanto green corridor). However, for those, participation can be distinguished according to (1) the moment in which citizens and stakeholders’ involvement starts (from the beginning as in Taasinge Square, Pavlos Melas metropolitan park and Bon Pastor neighbourhood to the end, as in the Place of de République or the Granary Square-King’s Cross), and (2) the typology of actions carried out, including studies and consultancy (Granary Square-King’s Cross), and thematic workshops (Place de la République) or discussions (Bon Pastor neighbourhood). On most occasions, consultancy (G3) differs among those projects in which feedback is limited to residents (Taasinge square, Place de la République, and Gorla Maggiore water park), users and associations (Augustenborg and Bon Pastor neighbourhoods, and Benthemplein Square), or stakeholders and specialists (Granary Square-King’s Cross, and Pavlos Melas metropolitan park). The project financing (F1) is mainly public and led by city councils (F2). How- ever, a public–private partnership is established when the project includes restoring urban buildings (Potsdamer Platz, Granary Square-King’s Criss, and Pavlos Melas metropolitan park). The cost of the projects (F3) varies from millions of euros (Augustenborg neigh- bourhood, Taasinge and Benthemplein squares, and Pavlos Melas metropolitan park) to thousands of euros (Bon Pastor neighbourhood and Monsanto green corridor), and tends to be determined by the number and dimension of hard adaptation structures. Land 2022, 11, 1575 15 of 24 Table 4. The political dimension in case studies: Governance and financing. Political Governance–Participation Financing Dimension Case Study G1 G2 G3 F1 F2 F3 24 million € Augustenborg Remodelling Malmo (including all Bottom-up Park’ users Public neighbourhood projects City Council physical in- frastructure) Temporary projects created Public consultation Copenhagen Taasinge Square Bottom-up with residents Public 2 million € to residents City Council from the beginning Teachers and students from the Graphic Lyceum and Zadkine College, Benthemplein users of the Rotterdam Bottom-up − Public 4.5 million € Square gymnasium, City Council members of the congregation of the nearby church, and residents Public consultation (not limited to local districts or citizens). Berlin City Neighbourhood Council and Potsdamer Bottom-up Public–Private − associations and Daimer − Platz (partially) Partnership environmental Chrysler organisations Inmobilien denounce the lack of environmental issues UK Intensive government studies and owned The local community, Granary Square- consultancy Public–Private property Bottom-up government, and − King’s Cross during different Partnership company and other stakeholders stages of the Argent King’s process Cross Limited Partnership Public events and thematic Place de la Residents and Paris City Bottom-up workshops Public − République business people Council organised by the city council Adotta il verde Lombardy pubblico (adopt Gorla Maggiore Region and 500,000– Bottom-up a green area) to Residents Public water park Milan City 2 million € sponsor public Council green areas Land 2022, 11, 1575 16 of 24 Table 4. Cont. Political Governance–Participation Financing Dimension Case Study G1 G2 G3 F1 F2 F3 Residents, key city stakeholders (urban development and financial European 60 million € Workshops to programmes, Union, Greek Pavlos Melas (Phase A: delve into key operational services Public–Private government metropolitan Bottom-up open space city and maintenance), Partnership and Pavlos park development, stakeholders and consultants Melas City 18 million €) (economists, Council architects, engineers and community builders) Representatives and members of the neighbourhood Planning and community Bon Pastor development of association. Social Barcelona Bottom-up Public 84,000 € neighbourhood SUDS opposition to the City Council discussion entire demolition of the neighbourhood (memory preservation) Monsanto Bottom-up Lisbon 50,000– − − Public green corridor (partially) City Council 100,000 € Codes: G1, type of participation process (Bottom-up/Top-down); G2, context of the participation process; G3, participants; F1, public/private; F2, developer, F3, cost. 4.3. The Environmental Dimension This dimension is the most transversal, as all projects are developed considering almost one component issue. The Potsdamer Platz is the initiative following a crisscross pattern after incorporating 12 out of 15 attributes (including all those related to climate change, C1-C4) (Table 5). On the contrary, Granary Square–King’s Cross, Monsanto green corridor and the neighbourhoods of Augustenborg and Bon Pastor are those accomplished with fewer environmental variables and mainly focused on biodiversity (B1-B6). Regarding the biodiversity component, all projects except the Monsanto green corridor increase land conversion (e.g., promoting green and humid areas) (B1), while more than half explicitly en- hance biodiversity (B3). The Gorla Maggiore water park accomplishes all variables (B1-B5) of the component, while the Taasinge and Benthemplein squares share the same attributes (B1-B4). Interestingly, half of the projects provide additional biodiversity functions (B6), such as confronting viewpoints on nature management (“wild” vs. “well-maintained”) suggested by the Augustenborg neighbourhood, promoting natural purification biotopes (Potsdamer Platz), discussing the social side of biodiversity actions (Granary Square-King’s Cross), reducing noise exposure (Place de la République), and redistributing biodiversity benefits across society (Monsanto green corridor). Landscaping promotion (B5) is the less ensured issue, only reinforced in three projects: Potsdamer Platz, Gorla Maggiore water park, and Pavlos Melas metropolitan park. Land 2022, 11, 1575 17 of 24 Table 5. The environmental dimension in case studies. Environmental Biodiversity Water Management Climate Change Dimension Case Study B1 B2 B3 B4 B5 B6 M1 M2 M3 M4 M5 C1 C2 C3 C4 Augustenborg √ √ √ √ √ √ √ − − − − − − − − neighbourhood √ √ √ √ √ √ √ √ √ √ Taasinge Square − − − − − √ √ √ √ √ √ √ √ √ √ Benthemplein Square − − − − − √ √ √ √ √ √ √ √ √ √ √ √ Potsdamer Platz − − − Granary Square- √ √ √ √ − − − − − − − − − − − King’s Cross Place de la √ √ √ √ √ √ √ √ √ √ − − − − − République Gorla Maggiore √ √ √ √ √ √ √ √ √ √ √ − − − − water park Pavlos Melas √ √ √ √ √ √ √ √ √ √ − − − − − metropolitan park Bon Pastor √ √ √ √ √ √ − − − − − − − − − neighbourhood Monsanto √ √ √ √ √ − − − − − − − − − − green corridor Codes: B1, increase land conversion (green areas, humid areas, etc.); B2, increase ecological connectivity; B3, enhance biodiversity; B4, improve air/soil quality; B5, promote landscaping; B6, other(s); M1, runoff control (flooding mitigation); M2, stormwater management; M3, improve water quality standards; M4, ensure water supply; M5, other(s); C1, reduce exposure; C2, reduce sensitivity; C3, enhance adaptive capacity; C4, other(s). Runoff control (flooding mitigation) (M1) is the most addressed function of the water management component (M1-M5), only dismissed by the Granary square–King’s Cross and the Monsanto green corridor. Both projects support additional functions (M5), such as encouraging cooling areas (in the same line as the Potsdamer Platz and Place de la République projects) and developing surface water spaces (ponds, meadows), as suggested by the Augustenborg neighbourhood. Ensuring water supply (M4) is promoted in half of the projects (mainly focusing on squares and places), while the need to improve water qual- ity standards (M3) is considered in four projects, including the two parks (Gorla Maggiore water park and Pavlos Melas metropolitan park). Likewise, stormwater management (M2) is limited to three case studies at the local scale: the Taasinge and Benthemplein squares and the Bon Pastor neighbourhood. Finally, all projects assume the need to reduce sensitivity to climate change effects (C2) as the most important issue of the climate change component (C1–C4). Likewise, seven projects aim to enhance adaptive capacity (C3), except for the Benthemplein and the Granary-King’s Cross squares and the Monsanto green corridor (the last two are only focused on reducing sensitivity to climate change effects (C2)). Besides the Potsdamer Platz, four projects also achieve the triple-loop of reducing exposure and sensitivity, while enhancing adaptive capacity (C1–C3): Taasinge square, Place de la République, Pavlos Melas metropolitan park, and Gorla Maggiore water park. Interestingly, the last one specifies actions to reduce sensitivity and thermal stress (e.g., restoration of marine and coastal ecosystems) or enlarge adaptive capacity (e.g., promoting environmental educa- tion). Additionally, the two neighbourhoods (Augustenborg and Bon Pastor) concur on enhancing adaptive capacity and reducing sensitivity beyond reducing exposure to climate change impacts. Furthermore, the Augustenborg neighbourhood is highly concerned with improving social benefits and ethics associated with green-blue infrastructures. 4.4. The Concurrence of Dimensions The previous sections highlighted the triple-loop approach of social, political, and environmental dimensions followed by different experiences with a shared goal: to increase resilience when designing public urban space. Each dimension has focused on specific components that are concurred in Figure 3 to identify the main interactions between plies governance (G1-G2-G3) and establishes how the development of bottom-up pro- cesses facilitates different participation mechanisms that can congregate diverse partici- pants (such as workshops, e.g., Place de la République and Pavlos Melas metropolitan park), who in turn reclaim more bottom-up processes. The second loop combines variables of two components, governance and financing (F1–F2), and establishes how bottom-up Land 2022, 11, 1575 18 of 24 processes can contribute to defining city councils’ actions that define public projects in which bottom-up processes need to be guaranteed. Likewise, the environmental dimension also provides two reinforcing loops, both formed fromand dimensions amongoftheir variables components, the same and subsequently, component. The first one is their degree to restricted of biodiversity intersection according to the characterization of the different case studies. A first look (B2-B3-B4) and highlights how actions to improve air and soil quality standards contribute illuminates the relevance of the social and environmental dimensions (blue and green to reinforcing ecological connectivity and enhance biodiversity, which consecutively askscolours) compared to the for morepolitical dimension. attention to air and However, the nature soil quality of the interactions (e.g., Taasinge and Benthempleinbetween squares, componentsand differs between the social dimension and the other two: the first is more Gorla Maggiore water park). The second loop, focused on climate change (C1-C2-C3), transversal because dis- it is monopolized by interactions among variables of different components cerns reducing exposure and sensitivity as mechanisms to improve adaptive capacity, (especially between “citizen well-being” and “citizenry vulnerable segments”), while the political and which reduces exposure to climate change impacts both at the local (e.g., Taasinge Square, the environmental dimensions follow a hybrid pattern. Quite surprisingly, all interactions Potsdamer Platz, Place de la République, and Augustenborg neighbourhood—the last one are positive (+), which means that variables tend to change in the same direction, and no only partially) and the regional scale (e.g., Gorla Maggiore water park and Pavlos Melas issues disturb the system. metropolitan park). Figure 3. Figure 3. The The CLD CLD combining combining variables variables from from social, social, political, political, and and environmental environmental dimensions. dimensions. Note: Note: Only those variables and related interactions identified in at least half of the case studies when Only those variables and related interactions identified in at least half of the case studies when addressing the triple-loop analysis (that is, obtaining 50% of ticks in Tables 2–4) have been consid- ered for the CLD analysis. Components are grouped by the same colours used in Figure 1: blue (social dimension), orange (politic dimension), and green (environmental dimension). Components category legend: “W” (Citizen well-being), “S” (Spatial benefits), “V” (Citizenry vulnerable seg- ments), “P” (Strategy/Plan), “A” (Urban planning—Actions), “G” (Governance), “F” (Financing), “B” (Biodiversity), “M” (Water management), “C” (Climate change). Each dimension counts with at least one reinforcing loop; the nexus between com- ponents is well-defined and can motivate further actions regarding urban public space development. The social dimension includes a reinforcing loop between two components: citizen well-being (W1–W2) and spatial benefits (S3–S4), which are confirmed by projects working at the local scale (e.g., Taasinge, Benthemplein, and Granary squares). Accordingly, promoting or increasing access to urban spaces enlarges context sensibility, asking for more places to stay, and building or improving social behaviour, enhancing access to urban spaces. The political dimension counts with two reinforcing loops. The first one implies governance (G1-G2-G3) and establishes how the development of bottom-up processes facilitates different participation mechanisms that can congregate diverse participants (such as workshops, e.g., Place de la République and Pavlos Melas metropolitan park), who in turn reclaim more bottom-up processes. The second loop combines variables of two com- ponents, governance and financing (F1–F2), and establishes how bottom-up processes can contribute to defining city councils’ actions that define public projects in which bottom-up processes need to be guaranteed. Likewise, the environmental dimension also provides two reinforcing loops, both formed from variables of the same component. The first one is restricted to biodiversity Land 2022, 11, 1575 19 of 24 (B2-B3-B4) and highlights how actions to improve air and soil quality standards contribute to reinforcing ecological connectivity and enhance biodiversity, which consecutively asks for more attention to air and soil quality (e.g., Taasinge and Benthemplein squares, and Gorla Maggiore water park). The second loop, focused on climate change (C1-C2-C3), discerns reducing exposure and sensitivity as mechanisms to improve adaptive capacity, which reduces exposure to climate change impacts both at the local (e.g., Taasinge Square, Potsdamer Platz, Place de la République, and Augustenborg neighbourhood—the last one only partially) and the regional scale (e.g., Gorla Maggiore water park and Pavlos Melas metropolitan park). Finally, it is interesting to note which type of variables reinforce the connection between dimensions: (1) the social and the political dimension are linked through the role of elderly citizens (V1) as potential participants (G3) in urban public space consultancy (e.g., Bon Pastor neighbourhood); (2) the political and the environmental dimensions are doubly connected by the role of city councils actions (F2) in promoting land conversion (B1) (all projects except Monsanto green corridor and Granary Square-King’s Cross), and by the relevance of green and blue infrastructure (A1–A2) in public projects (F1); (3) the environmental and the social dimensions are threefold joined by the relevance of improving air and soil quality (B4) and ecological connectivity (B2) to ensure residents access (V6) and encourage recreation and exercise activities (W3) (e.g., Taasinge and Benthemplein squares, Gorla Maggiore water park, and Monsanto green corridor). 5. Discussion and Conclusions Since the 1980s, urban public spaces have witnessed a renaissance and have become a key component of many regeneration and development schemes worldwide, with far- reaching impacts on how the resulting spaces are perceived and used [53]. Synergies between urban regeneration and the availability of green and public space to face climate change, enhance sustainability principles, and increase social cohesion have been aligned with concepts that have risen in popularity in recent years, such as “smart” or “resilient cities” [54]. However, urban public space cannot be taken for granted because urban planning tends to intensify and densify public space [55]. In this context, building resilience is about enhancing coping, adaptive, and transformative capacities altogether and not only from a technological perspective but from a social dimension to identify the most relevant and effective strategies for improving urban climate risk management [56]. Accordingly, this study provides a triple-loop approach to test the social, political, and environmental dimensions when designing urban public spaces and their resilience capacity in compact cities. Looking at the social dimension analysis, our results from ten European experiences highlighted two main issues. Firstly, social cohesion is improved in each case study by considering citizen well-being and spatial benefits while demonstrating sensitivity to quality space and accessibility (e.g., limiting car traffic or introducing a cycle path). However, despite citizen well-being representing one of the main projects’ objectives, the security aspect, something of particular relevance regarding gender, is not considered at all. This point fits well with the second conclusion: citizen vulnerability is poorly addressed, being the immigrants, women, and people with special needs social segments not explicitly recognised. This aspect undoubtedly weakens the social interface in all case studies and calls for more attention as immigrants tend to be undistinguished as part of the neighbourhood [57], women’s preferences are not considered when planning the built environment [58], and disabled people suffer from physical barriers and inadequate access [59]. In some cases, design solutions were adopted during social observations, often also in cooperation with the local community (during the organisation of workshops, discussions, or specific consultancies), and partially carried out from the beginning of the project to reflect the needs of residents and stakeholders. Thanks to the cooperation with the local community, the projects could not only become leader cases in the struggle against climate change: each project could also reach the users and become a place of social Land 2022, 11, 1575 20 of 24 activation by exploring the association between place attachment and social interaction to improve social cohesion and sense of belonging [60]. The analysis of the political dimension reported three main points. First, all projects have been developed as part of a strategy, (renewable) plan or master plan; and some even developed as climate change adaptation actions. Second, projects attempt to reinforce hard adaptation measures to manage water resources (e.g., ponds, canals, fountains, sewers) while increasingly introducing soft adaptation measures, some of them circumscribing social aspects, such as educational, sports or cultural facilities at a large scale or the local scale through playful–recreational activities. Finally, most projects include a citizens’ participation strategy following a bottom-up approach, some of them considering citizens or stakeholders’ involvement from the beginning, while others promote thematic workshops or discussions during the project’s development. This point, together with the pre-eminence of public initiatives, runs in line with the EU Covenant of Mayors for Climate & Energy initiative, through which consolidating urban climate governance options are required to transform the urban structure as long as it asks for solid cooperation with citizens and local business [61]. Accordingly, while the involvement of experts and specialists is necessary, a participatory approach that directly engages end-users is essential for assessing public spaces’ cultural and social values, empowering citizens, and increasing their sense of community and belonging [62]. However, our analysis reveals that projects tend to not specify enough details about how to reinforce and maintain citizens and key stakeholders’ involvement before, during, and after the end of the project. Although the governance component has been highly addressed in most of the experiences examined, and the role of city councils is highly recognised, the literature confirms that the lack of transparency or a failure to meet citizens’ expectations can be considered a limiting factor for reinforcing urban resilience and used as political trust-degrading factors [63]. Together with the combination of social and political components, the environmental dimension turns urban public spaces into interfaces for adaptation [64]. Our results confirm this dimension as the most transversal, identifying two primary outcomes. Firstly, all projects assume the need to reduce sensitivity to climate change effects, also remarking some actions to reduce sensitivity and thermal stress (e.g., restoration of marine and coastal ecosystems) or enlarge adaptive capacity (e.g., promoting environmental education). Sec- ondly, most projects provide solid actions emphasising biodiversity from land conversion and ecological connectivity to reduce exposure and sensitivity to climate change. At the same time, there is a lack of attention to landscaping promotion, while water management attributes are limited to runoff control and water supply issues. It was expected that projects rethink and reinvent themselves as water-smart cities, following an NBS solution- orientation criterion in which “nature” does not provide solutions by traditional linearity, but evolves from experimentation, evaluation, and adaptive learning [65]. This point can reinforce, for example, shifting from drained to sponge cities, using reclaimed water while still generating chances to green the city and improve liveability [66]. Some of the analysed projects include NBS in the form of UGI (e.g., planting trees and plants and connecting green spaces). However, BGI to manage water storage is only partially recognised as the primary function and added value for some initiatives (e.g., building constructed wetlands), while most are far from providing specific actions to face extreme rainfall events [67]. Figure 4 synthesises the main learnings from integrating the social, political and environmental dimensions. Its application highlights internal factors (strengths and weak- nesses), which are more numerous than external ones (opportunities and threats). Likewise, the pre-eminence of positive issues (strengths) from the social and political dimensions can be interpreted as a possibility to emphasise and reinforce the human approach from social-learning mechanisms. 022, 11, x FOR LandPEER 2022, REVIEW 11, 1575 21 of 24 21 of 24 Figure 4. SWOT analysis Figure on social, 4. SWOT political, analysis and political, on social, environmental dimensions. dimensions. and environmental Note: Blue colour re- colour recaps Note: Blue caps social dimension attributes, orange colour those that form the political dimension, and learn- social dimension attributes, orange colour those that form the political dimension, and learnings ings from the environmental dimension are highlighted in green. A hierarchy is used to put on top from the environmental dimension are highlighted in green. A hierarchy is used to put on top of each of each dimension list (colour) those issues shared the most by the experiences. dimension list (colour) those issues shared the most by the experiences. As the impacts and implications of climate change in cities become increasingly clear, As the impacts and implications of climate change in cities become increasingly clear, future research should provide approaches, tools, and processes to support urban resili- future research should provide approaches, tools, and processes to support urban resilience ence from an integrated perspective. The triple-loop approach developed and applied in from an integrated perspective. The triple-loop approach developed and applied in this this research research aimed toaimed reinforce the mindset to reinforce to shift from the mindset conventional to shift and linear from conventional andtolinear co- to coevolu- evolutionary,tionary, circular,circular, and holistic systemssystems and holistic under an iterative under processprocess an iterative [68]. The obtained [68]. The obtained results results provide insight into its practical application, increasing attention provide insight into its practical application, increasing attention paid paid to the social to the social and and political political dimensions that influence the operationalizing of designing urban public dimensions that influence the operationalizing of designing urban public spaces. spaces. However, there there However, is a need is a to develop need methodological to develop pathways methodological in which pathways objective in which objective metrics metrics (e.g., number of citizens (e.g., number affected, of citizens size size affected, of social andand of social vulnerable segments, vulnerable segments,temper- temperature before ature before and andafter afterthe theintervention, intervention, amount amount of of water water saved, saved, lowering lowering ofof costs costs of of water water management, management,and andflooding floodingrisk riskreduction) reduction)can can be be considered, considered, or or even even required required from from promoters pro- as part moters as partofofthe thepre-proposal pre-proposaland andpost-evaluation post-evaluationof ofthe theurban urbanpublic publicdesigning designing and and management management process. process. Author Contributions: Conceptualization, Author Contributions: S.R. and D.S.; methodology, Conceptualization, S.R. and D.S.; S.R.; formal analysis, methodology, S.R.; analysis, S.R.; S.R.; formal investigation, S.R., investigation, S.R., C.B., G.N.T. and D.S.; resources, S.R., C.B., G.N.T. and D.S.; dataS.R. C.B., G.N.T. and D.S.; resources, S.R., C.B., G.N.T. and D.S.; data curation, curation, S.R. and and G.N.T.; writing—original draft preparation, G.N.T.; writing—original S.R.; writing—review draft preparation, and editing, S.R.; writing—review andS.R., C.B., G.N.T. editing, S.R., C.B., G.N.T. and and D.S. All authors have D.S. All read have authors and agreed to the read and published agreed version of version to the published the manuscript. of the manuscript. Funding: This research Funding:received no external This research funding. received no external funding. Data Availability DataStatement: NotStatement: Availability applicable.Not applicable. 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