Co-management/Joint management

The historical canal that was disconnected by a road in the 1970s is currently being restored by the municipality, creating a lively atmosphere allowing for water recreation, a boulevard and green spaces (ref. 1). A small element of this restoration is the addition of green elements by a citizen group, which entails improving ecological, aesthetic and historical quality of the canal by implementing eco-friendly riverbanks, green connecting zones and floating vegetation islands (ref. 3,9,11,12).

Urban gardening or gardening in the city is a form of agriculture that is about more than just producing food: community gardens involves also social, cultural and political components. It's about actively participating in urban development, creating new living spaces or making a contribution to biological diversity (ref. 3). The campus garden on a surface area of 1,200 sqm provided by the university was created by a group of students in 2013. It is open every day to everyone interested in gardening and serves as a place for recreation and exchange for students of different disciplines and citizens. Apart from herbs, vegetables and fruits, also flowers are planted. Seeds and materials used as plant beds, such as tires or rice bags are often donated from the city or local businesses (ref. 3 and 4).

Appletree is an outdoor community resource, where people of all ages and from all walks of life, get together to grow e.g. fruit, and contribute to developing and maintaining the area. The growing space and garden are divided into different areas, offering a range of gardening experience. The community also contributes to their permaculture, wildlife and wildflower areas. The community is constantly planting and regenerating areas of the garden. (Ref. 1)

The Polder Roof is a green roof originally installed on the top of the Old School Amsterdam, Gaasterlandstraat, Amsterdam with innovative controllable water storage and drainage system on which crops are grown, solar panels are installed and that provides space for recreation. (1,2) Thereby, it combines multiple benefits including the reduction of heat stress, noise reduction, sustainable energy provision, biodiversity, food production and climate change adaptation (2,7). The Polder Roof was a pilot project that won an innovation award and is viewed as an example for urban climate change adaptation solutions. (2).

In 2019, due to the renovation of the former Old School building, it was necessary to relocate the Polder roof to a different place. The Polder Roof is a completely de-mountable system, made up of crates with a sedum layer on top, thus it could be removed quite easily from the Old School roof and put somewhere else. In the name of circularity, the sustainable drainage system was moved to the roof of the South Food Bank building. (10,11,12) With the relocation of the Polder Roof system, however, the size of the green roof has decreased to 1200 sqm from 2010 sqm (2).

With the relocation of the railways between the Hauptbahnhof and Pasing a large area became available for an infill development strategy. The redevelopment of central railway areas of Munich is in line with the city's guidelines for sustainable development (Perspective München) referred to as compact - urban - green. The initiative is aimed at implementing 7500 new flats and creating 15000 new workplaces in total, which are supported by green recreational areas. (Reference 1) The project consists of six separately planned parts, some are already partially finished. (Reference 2) This NBS discusses Birketweg, one of these parts, which is 60 hectares large.

The Carbon Landscape is a pioneering project in landscape restoration in Wigan, Warrington and Salford. Led by the Lancashire Wildlife Trust, it will revitalize a landscape left devastated by decades of coal-mining and peat extraction (Ref 5). It works to restore key habitats and reconnect local people with their unique natural heritage, preserving it for future generations. The restoration of the peat base to lowland raised bog provided an opportunity for carbon sequestration and storage (Ref 1). There is a strong vision to reconnect local people with their rich natural heritage, creating opportunities and a sense of pride in the local area (Ref 4).

Within the national park of Alta Murgia, a project was implemented since 2006 from a company which produces ecological products ("Fattoria della Mandorla"). They aimed at creating an ecovillage with allotment gardens by practising biological agriculture and promoting biodiversity for cultivated plants. In addition, the project aims at improving the contact of visitors with nature and give further value to the natural park. Moreover, the project wants to stimulate sustainable production and consumption of cultivated products. (Ref.1.)

The Garden Factory ('Tuinfabriek') is an exceptional urban agriculture project on a roof of the central station that aims at becoming the largest food-producing roof of the Netherlands. The project is a self-sustaining vegetable garden located on the roof of a busy mall in the centre of Utrecht (ref. 5). On the roof, citizens, students, company employees and schools work together to grow vegetables and keep bees and chicken. The Garden Factory reflects an ecological 'self-sustaining factory' as the chickens, worms and bees 'work' in the garden as being part of the decomposing system and pollination and a system is built for rainwater retention that allows for irrigation (ref. 1). Eating, composting, sowing, growing, harvesting, cooking form the production process of this Garden Factory (ref. 4).
The main elements of the roof garden are in place, such as the crop bins, the chicken coop and the decomposing machine are completed. However, it is an ongoing developing project as some elements are still in development stage such as some elements of the Soup Kitchen and the aim is to integrate the Garden Factory more with the central station shopping mall in multiple ways (ref. 1).

The city department for green space, environment and sustainability and the foundation citizens for Münster initiated a citizen-based intervention which aims at turning the park area at the "Spickmannplatz“ called "Grünschleife“ into a meeting point for residents and neighbours. The concept for its regeneration is based on workshops and ideation processes of citizens whose involvement goes beyond urban gardening activities but involves an active co-creation of the area by co-planning and development. Apart from several communal restorations works, vegetables, fruits and herbs plantations, a pavilion, a dog station and chessboards with benches were set up (ref. 1).

The hurricane Kyrill devastated up to one-third of the tree stock in the city of Münster and thereby changed the green cityscape in 2007. Therefore, the civic society movement "Foundation Citizens for Münster" initiated the project "Bürgerbäume" (literal translation: citizen trees) to foster reforestation of the promenade of the city castle and other affected spots in 2008. In collaboration with the city department for urban green, motivated citizens and citizen groups took over tree sponsorships with up to € 1,000 per tree to help restore the urban green within three months after the event (ref. 1, 4).