Other

The Natural Park of Collserola (about 8,000 ha) is a forested area in the hilly Northern fringes of Barcelona. Since 1987, Collserola has been managed under a special protection plan and forms part of the European FEDENATUR network that aims at protected fragile peri-urban ecosystem for both their social and ecological functions. The park is jointly managed by a consortium including the Catalan government (Generalitat de Catalunya), the Barcelona Provincial Council (Diputació de Barcelona), the Metropolitan Area of Barcelona (AMB) as well as all adjacent municipalities (Ref 1).

The Parc Agrari del Baix Llobregat is located in the floodplains of the delta and lower valley of the river Llobregat, in the Catalan county of Baix Llobregat, in a central position within the metropolitan area of Barcelona. The territory of the park (nearly 3500 hectares), includes a rich traditional agricultural activity and comprises fourteen municipalities totaling about 818,000 residents. It is protected by a specific planning instrument and managed by the Barcelona Provincial Council (Diputació de Barcelona) (Ref. 1 and 9). The park acts as a green lung for the metropolitan area of Barcelona and at the same time as a pantry for Mercabarna, the large wholesale market that provides food and drink to the inhabitants of Barcelona and surrounding towns, although there is also production that is exported (Ref. 10). The Agrarian Park is the only one in the world so close to a large city and it promotes specific programs to preserve the productive values of the agricultural space and promotes quality local products and local consumption. (Ref. 10)

Joan Reventós Park is a public park of about two hectares in Barcelona. It was opened in May 2009. The park is located within the catchment area of “Riera de les Monges” watercourse. For this reason, a sustainable drainage and sewer system (SUDS) was created in case of heavy rainfall, also harboring a flood area that prevents overflows (Ref. 1). This 20,091 square meter forest area has been converted into a recreational space for the local neighborhood and a playground, as well as a connecting corridor between the school zones and the center of the neighborhood (Ref. 3)

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).

The Hort de la Masia de l'Antic Jardí Botànic is located within the city’s largest inner-city park Montjuic. It has been founded in 2008 by an association of volunteers and is supported by public and private entities. The garden is co-management by members of the association and a professional gardener. Its major objective is the maintenance and reproduction of traditional landraces (Ref. 2). The task of the Citizen's Commission of Support of the Botanical Garden, presided by Pere Duran, was supported by the promotion work from the Botanical Institute. It was therefore a necessity generated by a local group of people (citizens) that developed into an implementation plan (Ref 1).

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).

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)

The Senate of Hamburg commissioned IBA Hamburg GmbH with the development of the project which aims at realizing two new, family friendly residential districts in Neugraben-Fischbek, the Fischbecker Heidbrook and Fischbeker Reethen, which will offer 3000 residential units in total. (Reference 10) Out of the two districts, Fischbeker Reethen is planned to be the "Garden City of the 21st century", which is why this NBS case focuses on that project. The Fischbeker Reethen project pays attention to sustainability, having a blue-green infrastructure (large green surfaces, waterways and a lake that serves as a basis for the rainwater management of the area). A further aim of the project is to create a new district for the growing city, that with its good infrastructure, public transport connection and educational offers will help the integration of refugees into German society. (Reference 12) The construction of the buildings followed by the green and recreational elements is will start in the second half of 2020, and the handover is planned for 2022 the earliest. (Reference 7)

The orchard of the Vallon was established by the city in an area that had historically served as an orchard fifty years previous (Ref. 9). A few pear trees had survived and gave rise to the idea of ​​reconstituting it. In 2014, the city planted apple, peach, pear, cherry, apricot and other fruit trees on one and a half hectares of greenery. "At the beginning of 2015, the association Le Verger du Vallon was born. With its members, its mission is to maintain these trees with a view to sharing knowledge and educational exchanges "(Ref. 9). "Called upon by the city of Rouen for the establishment of a participatory orchard, the social center wished to promote this project among the inhabitants within the framework of the arrow projects of the CAF (social security) de la Seine Maritime entering the field of financing "to support a cooperative project of residents initiated and built with them from a common concern " (Ref. 3, page Description).