Achieved impacts

A long-awaited flood defence scheme which is designed to protect the city from a repeat of the devastating floods in 2007. "The ambitious project has taken 14 years of planning" and will protect the city's gateway (Westgate). The project manager from EA, said: "The work we're doing on the Ings Beck scheme will mean Wakefield is protected against the kind of flood that only has a one in 100 chance of happening in a year." The scheme involves solving the flooding problem and encourage wildlife habitat. (Ref. 1)

The Aa promenade, created in 1950 to provide the citizens of Muenster with a green experience trail in the inner city, was redeveloped in the 90s with several planting measures on riverbanks, walls and in adjacent areas. Next to a brochure, a nature trail which combines the existing recreational with an educational component was created with 18 site-specific signposting points. They cover multiple benefits and ecological functions of urban green spaces, city trees and green facades/walls (microclimate regulation, air quality, CO2 capture), anthropogenic threats, unknown biodiversity hotspots and natural monuments (Ref. 1, 3 and 6).

The Green Ventilation Corridors network in Stuttgart, Germany is an implemented nature-based solution coupled with regulatory policies and incentives. Within this initiative, Green ventilation corridors were created to enable fresh air to sweep down from hills surrounding the city (4).

Bute Park is a riverside green spot with an arboretum and gardens, containing a broad range of ecosystems supporting a wide variety of living species (ref 4). The historic Mill Leat had been dry since the 1970s."The word "leat" refers to "an open watercourse conducting water to a mill". The Mill Leat sits on the same site as a former millpond at the end of the original medieval millstream. It supplied water to corn mills located to the south of the Wst Gate and contained water well into the 1970s." (Ref 10) .Mill Leat Restoration or the re-flooding of the dry water body was a major deliverable under the Bute Park Restoration project (ref 2). In 2013 the overgrown channel was excavated, lined and refilled with water as part of the Bute Park Restoration Project (Ref 2). It enhanced the character of the park and provided a new habitat for wildlife (ref 1). Now re-flooded, Mill Leat is self-contained, self-regulating and self-circulating. It has reduced the risk of flooding and created a sustainable water feature (ref 2).

The Knowledge Mile Park initiative in Amsterdam aims to transform the long, busy and traffic-heavy street in downtown Amsterdam into an environment greener, more sustainable and more livable through the implementation on various Nature-based Solutions (9). Smaller projects include the creation and maintenance of pocket parks, green walls and facades, green roofs and living labs. The idea of the initiative came from the Knowledge Mile Community that aims at making Amsterdam more green, clean and smart by means of innovative solutions regarding air quality, climate change resilience, biodiversity and social cohesion. (1) municipality of Amsterdam and the business investment zone BIZ Knowledge Mile are working together with partners on the realization of the project (9)
The project is still ongoing, although parts of the Knowledge Mile Park are already created in 2016 including one living lab, two green roofs, a green canopy and a pocket park and other parts are planned such as the smart green wall (1)

The indoor green wall installed at the University of Natural Sciences in Lublin. Apart from its decorative and aesthetical functions, the wall will serve educational and research purposes. The wall consists entirely of moss and does not require watering. It will be monitored regularly to analyse the impact of light conditions for proper growth and development of plants in these type of installations [1,2].

The first external green wall in Lublin was installed at the University of Natural Sciences in September 2015, and it was later followed by two smaller installations inside and outside in 2017 [5]. Apart from their decorative and aesthetical functions, the walls serve educational and research purposes, as the suitability of the chosen plants for the Polish climate conditions will be evaluated for similar urban projects in the country. Finally, the project promotes urban greenery and certain offsetting for grey infrastructure [1, 2, 3, 5].

In 2008 the new building of the WGV-Insurance has been opened in Stuttgart. Since then customers and employees of the WGV have enjoyed the beautiful courtyards which contribute to a good working environment. The approx. 3.6 ft. (1.1 m) high, built-in planters have been provided with an automatic irrigation system with the irrigation pipes installed below the elevated concrete slabs. The four courtyards have been planted with a total of 58 small crowned trees. In addition, several extensive green roof areas of approx. 21,600 sq. ft. (2,000 m²) total were installed to improve the Stuttgart climate. (1, 6).

Monglong Park was rehabilitated in 2012 with the explicit aim of strengthening social ties. The site is a wooded area of 4 hectares to the south of the Bellefontaine district. Unknown until its redevelopment, it constitutes a true ecological niche for the city and has great biological richness and landscape. The associations of gardeners and the gardeners of the Bellefontaine neighborhood, including the Maghreb and Mong communities, were involved throughout the construction of the park (Ref. 2).

The Park Killesberg serves as the green centre of the newly constructed district in Stuttgart and continues the long history of the area as a garden show site with a contemporary expression of landscape architecture and as a model for interconnected green spaces. The design is the result of a collaborative process with the local authorities, citizens and neighbours (1).