Increased protection against flooding

In 2009, the city of Montpellier launched a large census project to valorize its abandoned areas. The study gives guidance on the management of abandoned areas in Montpellier, particularly in connection with environmental education and awareness objectives (Ref. 2). The strategy aims to preserve and promote the natural heritage of Montpellier; promote wastelands as reservoirs of biodiversity, tools for connecting natural spaces; protect and enhance the great green flows accompanying watercourses (biological links and privileged sites for fauna and flora); and develop a network of soft transport throughout the city based on the green network (rivers, agricultural, natural and park areas) (Ref. 4). "The spaces have been classified according to their context, their origin, their potential. This sometimes subjective typology presents a classification of the wasteland and makes it possible to take a particular look on each land. Surfaces of all shapes and sizes fall within this operational classification." Four Experimental projects include: Zenith Friche, Promenade of the Lironde, Pastourelle, Combemale" (Source: uploaded document).

"The Lez is a small Mediterranean river 28.5 km long, born from a karstic exurgence whose supply zone extends north of the source, over more than 150 km2. The “Le Lez” site was proposed in February 2001 because of the presence of several species and natural habitats protected at European level. The designated part concerns the upstream course of the Lez river, its riparian forest and associated agricultural environments. Covering an area of ​​144 hectares, the area stretches over 14 km from the Lez sources in Saint-Clément-de-Rivière to the Concorde bridge, in the town of Montpellier" (Ref. 4). Strong economic and demographic development near Le Lez implies urban pressure on peripheral sectors, particularly north of Montpellier where many residential areas are developing. The river became protected thanks to the "Natura 2000 European network" which aims to reconcile human activities and the conservation of biodiversity on the basis of the main principles of sustainable development (Ref. 4).

The Street Office (Gatukontoret) and VA Syd rebuilt Fjärilsparken (The butterfly park) in Bunkeflostrand (Malmö). For the shallow stream that runs through the park the slopes of the dikes have been made flat, meadow vegetation and wetland-plants planted in the wetlands. An area east of the park was built with houses and stormwater was managed in new ways (ref. 1). Opening the park up to the sea, flower beds were planted for richer plant and wildlife, butterfly-attracting plants were planted, lighting for safety was installed and areas with benches and bridges were created (ref. 1).

The 18 km long Rheindorfer stream flowing into the Rhine has faced increased urbanization, industrial activity and surface sealing over the last decades of the 20th century. As a result, numerous interventions were made to its original structure, such as the creation of a concrete bed for the stream and the straightening of the stream course. Meanwhile, an increasing amount of pressure was put on its water carrying capacity. In order to improve the flood retention capacity of the stream, the renaturalization project of the stream was executed in some parts of the water body. The project aims were 1) to restore the natural course of the stream and the state of the riverbeds, thus enhancing the stream's capacity to buffer floods, 2) restore the natural biodiversity of the floodplain and 3) to create a recreational area for locals (1,2).

This NBS involved the reconstruction of two of the total of four lakes/ponds at the Iron Fountain (Železná studnička) and was one of the project sites undertaken by the Bratislava Zelenaj project. (7, 8, 10) The location served as a recreational and relaxing spot for locals and tourists. To undertake the reconstruction, the two lakes/ponds no. 3 and no. 4 had to be discharged. Upon doing so many species of fish were found, including carp, caras, catfish, rabbitfish, toothpick, lure or amur, and also bivalve molluscs and troughs. Reconstruction of water reservoirs (ponds) no. 3 and no. 4 were implemented by the City of Bratislava within the framework of the project in cooperation with the Monumental Office of the Slovak Republic and the Municipal Forests company. (9, 11, 20)

Larkhill Gardens Lake improvement is a collaborative project between the City Council, the Environment Agency and the local community. It is part of the long-term project, Liverpool Park Lakes Project, whose aim is to tackle many problems faced by shallow park lakes. Larkhill Gardens Lake (4936m2) a circular shaped, steep, vertical hard-banked lake, situated in a small estates garden in the city. Like many lakes, Larkhill Gardens Lake experienced problems linked to structural decline, lack of water, poor water quality, poor habitat quality, loss of management of the user and lack of proactive management by the City Council. The improvement of the lake included changing its structure to create a deep-water fishing area, shallow water area and wetland.
The project was funded by a partnership between Liverpool City Council and the Environment Agency (Reference 1).

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 curtain forest at the end of the city is a project that was initiated by the Timisoara's Municipality in 2001 by planting different tree species and creating a barrier for high-temperature summers. It's 60 m high and it was designed to stand in front of very strong winds especially since Timisoara is a city located in a very plain area. Now, it comprises 23 hectares and the municipality aims at 50. (2)

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 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)