Green densification model

Wirral Waters is the largest regeneration project in the UK. It will transform over 500 acres of the Birkenhead docklands into an internationally recognizable destination (where e.g. innovation and sustainability will thrive). (Ref. 1, 2). While the whole project will take up to 30 years to finish, the first phase has started in 2019 and building work has begun on three projects which will bring 1,000 homes and breathe new life into 500 acres of former dockland in the town. £220 million will be invested in the next three to four years alone in an effort to build high quality, high-density accommodation with lots of green space and employment opportunities close by (Ref 10,11).

The municipality of Catania has promoted an initiative that involves schools and non-profit associations, for which available space for urban gardens and horticulture has been provided. The main aim was to regenerate areas which were used abusively as landfills and for criminal activities. What will be produced must strictly conform to the principles of sustainable production, by using biological products and 0 environmental impact techniques. (Ref.1.)

The regeneration of the square in Catania has been envisioned since 2016 and completed in 2017. Apart from the changing rules in the accessibility of the square, the central area was equipped with a large flowerbed and additional trees and plants of different geographical origins. The whole green area provides illumination infrastructure, benches and bins to collect trash. This is expected to improve the whole area, and to create a new place of social inclusion and meeting point. (Ref.1.)

Port Sunlight River Park has been transformed from a closed landfill site to a 28-hectare park providing a popular community space with an array of walkways, wildlife, wildflowers, woodlands and a wetlands area. Port Sunlight River Park is a 30 hectare green space, park and wetland reclaimed from a former landfill site with a 37m high hill offering unrivalled views across the Mersey, Wirral and North Wales. (Ref 9). Autism Together were later brought in to help realise the Land Trust’s vision to provide a community site that makes a positive difference for local people and visitors, promoting healthy lifestyles in the process. (Ref. 1, 2).

The Tree Master Plan of Barcelona is a long-term (20-year) plan, running from 2017 to 2037. The ultimate goal of the Tree Master Plan is to ensure the presence of dynamic, healthy and diverse urban trees in Barcelona. According to the Plan, urban trees are essential for green infrastructure and for creating quality public space in the city. An innovative feature of this intervention is the use of biological approaches to the tree maintenance (no pesticides or chemicals) (Ref 1, 2 and 3).

This is a co-management initiative fostered by the City Council of Barcelona that aims to involve civil society in defining, installing and managing unused spaces across all districts of the city. The city council provides temporary use for public entities or non-profit associations to develop temporary uses and activities (from one year to three renewable years) in order to promote social activism and cohesion in the neighborhood. Most part of activities are social urban gardens (Ref 1). The initiative had 2 editions, with 12 projects in the first one (2013) and 5 projects in the second one (2015) (Ref. 12). One of the most popular projects is the community gardens such as ConnectHort, in Poblenou, dedicated to permaculture, which has allowed the restoration of an abandoned area through sustainable urban agriculture practices (Ref. 12). Another project, the Illa dels Tres Horts project in the Font de la Guatlla neighborhood, is an orchard where work is done with vulnerable groups and allow the recovery of vulnerable species (Ref. 12)

The gardens of the Rambla de Sants is an elevated linear park (similar to the High line of New York) located in the Sants district of Barcelona (760 meters long and about 6 ha size). It is located over the structure of train and metro lines. It was opened to the public in August of 2016. The gardens include mainly native plantations, playground areas, and other facilities (Ref. 2).

The Barcelona Green Infrastructure and Biodiversity Plan 2020 includes the development of several urban green corridors to increase ecological and social connectivity within the city. The green corridor of Passeig de Sant Joan is one of the first of these corridors implemented. The project consisted of the renovation of the promenade through tree and shrub planting and permeable green pavement installation, creating a green boulevard that benefits pedestrians and extend the urban green spaces, which gave new life to the neighborhood and allowed the expansion of small businesses and tourism (Ref 1).

Fil vert aims to help green the streets in Normandy and raise awareness among citizens of the importance of being an actor of their daily life with regard to the occupation of public space. They aim to "embellish our streets, which are often devoid of vegetation, but also to train responsible citizens" (Ref. 7). "Operation "Fil Vert" was launched at Croix de Pierre (District) in Rouen in September 2013 to beautify and revitalize the district by mobilizing residents and tradespeople. It aims of installing planters in front of the inhabitants and the merchants (subject to obtaining the agreement of the owners in case of hiring), along the pavements, provided that it makes at least 1.40 M width to allow strollers and wheelchairs to pass." (Ref. 3)

A 5256 m2 extensive green roof was installed to the Washington School in Sunderland as part of the environmental standard set by the local government’s “Building Schools for the Future” (BSF) programme. Besides being a learning tool and being aesthetically pleasing, the roof provides a habitat, helps reduce ambient temperatures, assist in rainwater management and air filtering. The Hetton Lyons Primary school intervention is also part of this city-wide project (Ref 1).