Water management (SDG 6)

Approximately one-fifth of the rain that falls in Malmö's urban area is led to Risebergabäcken, which makes it by far Malmö's largest watercourse. None of the other watercourses receives more than a very small part of the municipality's stormwater. The flow in Risebergabäcken is in many places it is narrow and deep, which means that the water rises quickly when there is a lot of rain (ref. 7). Large precipitation and asphalt industrial environment in Skogholm's meadows (Skogholms ängar) have long been a problem of overload in Risebergabäcken, but the ecological stormwater system delays and cleans the water, as well as preventing erosion and floods (ref. 1).

The 53 square meters large green wall can be found in an office building in the center of Budapest. (Reference 9) It helps to balance the humidity indoors, cleans the air and provides a comfortable work environment. The project includes rainwater collection for the irrigation of the green wall. (Reference 6) The building itself was the first one in Central-Eastern Europe to gain the double environmental certification of BREEAM Very Good and LEED Gold. (Reference 9) The focus of the NBS are the indoor green walls, but the building itself also features vegetation on multiple terraces and sun collectors. (Reference 10)

Sofielund invests in a sustainable area. Carpool/joint recycling centre were some of the proposals discussed when property owners, Malmö city and some experts discussed how Sofielund could become more sustainable in the future. The idea is that the environmental days in Malmö (e.g. a workshop) will lead to an action plan to make Sofielund greener. Property owners Sofielund has been at the forefront of a local sustainability work that can be a model for the rest of the country. In February 2017, a memorandum of understanding was signed about concrete efforts to strengthen the Sofielund area (Ref. 1, 2). There is a strong political support for the work that is being done in Sofielund and the BID concept is now upscaled to a sixth project area called Case Sofielund. (Ref. 6).

With its parking areas, ponds, the Lutter stream, playground facilities, walking and jogging paths, the green corridor of Bielefeld, called Luttergrünzug offers recreation opportunity to around 36, 000 people, living in the surrounding areas. As a link between the eastern city center and the district of Heepen, it also enables walking and cycling routes for commuting and shopping away from the busy streets of the city (7). However, the green corridor has been showing some structural and functional defects such as the silting up of the ponds, conflicts between pedestrians and cyclists and the increasing overgrowth of the green belt (8). In order to solve these problems, the renovation and redesign of the Green Corridor was proposed. The regeneration project addresses different needs and requirements of the municipality, namely providing the comfortable infrastructure for pedestrians and cyclists, and the increase of attractiveness of the neighbouring residential areas. In the planning process, special attention was paid to the improvement of the draining system and the reservoirs of the area that will protect the Belt from flooding. (8)

Two regeneration plans were developed with citizens' involvement and presented to the political committee. In 2017, the implementation of the "smaller" variant was voted for, which was already presented in the first citizens' workshop (1, 4).

The first stage of the investment: Building an urban park in the city area where there is a lack of green recreational spaces for the citizens. The park is to be built on the undeveloped ground. The initiative involves cleaning the area, planting greenery, purification and regulation of the watercourse Warszowiec and building stone stream edges, building the bike and running paths, 2 playgrounds for various age groups, open-air gym, and a multifunctional field for basketball, volleyball, tennis and table tennis (planned). The project is supplemented with the so-called small architecture including benches, rubbish bins, bicycle racks, tables and bowers [1,2]. The second stage: executing the planned multifunctional sports field and building a so-called physical activity square with a wooden platform, wooden pergola by the stream. A fence around the playground is built and new lighting and monitoring systems introduced. The second stage assumes management and maintenance of the green areas too [5,6].

Revitalization of the Brodowski Pond and its surroundings that include: revitalization of the pond itself, modernization of the viewpoints, building alleys, new lighting system, senior corner, playground, gym, greenery, recreational areas and a dog run. The justification for the project emphasizes revitalization of the area, improving its functionality and usefulness as well as aesthetics while preserving the terrain and raising the importance of the pond as a public space of a city of particular aesthetic values. (1)(2)

The Svoradova small park is an NBS site of the Bratislava zelenaj project. The newly renovated park (once part of the historical Pálffy Garden) on Svoradova Street in Old Town was previously abandoned and neglected. (14) It is part of the citywide Bratislava zelenaj project aimed at protecting and promoting the welfare of the city’s vulnerable citizens from the effects of climate change, (1) providing a safe recreational space for children (with a small playground for playing and swings). The park also has new lighting, and the whole space is home to new flowers, bridges and trees. (10, 12, 18)

The BiodiverCity-project aimed to develop products, services and processes which support and enhance the city’s biodiversity and thus contribute to a vision of a green, attractive and healthy city (ref. 1). The project had been divided in three steps, step 1 involving preliminary studies and step 2 was practical work for two years. During step 2 different cases were identified to test new ways to e.g. increase the city's biodiversity. Step 3 included spreading to other sectors through seminars, education and exhibition activities. It also included the commercialization of green solutions (ref. 2).

Agora Budapest is a large scale urban redevelopment project initiated by private investors. Besides implementing five high-quality office buildings, the investors aim at creating green public spaces the size of 7000 square metres in order to provide a healthy and vivid working environment. The green surface involves green roofs, parks and tree lines, all which will be irrigated using collected rainwater. The solar panels on the roofs of the buildings are also part of the sustainability plans of the investors. (Ref 1. and Ref 4.)

In 2014, the Bielefeld Botanical Garden was expanded with a 2,700 land, previously owned by the local municipality. The extension area and the “old” part of the Botanical Garden were visually and functionally separated by the dense, sometimes gloomy woody vegetation of the "new" area where the watercourse and the small reservoirs were barely noticeable. The aim of the redevelopment is to integrate the entire extension area into the old botanical garden using pathways between the old and the new areas of the botanical garden, the improvements of water body and vegetation areas. The redevelopment also includes the renovation of buildings in the "old" area of the botanical garden, the installation of new recreation facilities and the building of a pharmacy garden. The planning and implementation process is lead by the Friends of the Botanical Garden Bielefeld Association (Verein Freunde DesBotanischen Gartens Bielefeld e.V) in close cooperation with the Environmental Agency of the local municipality (1,2, 7,10,11)