Flood protection

The Green and Blue Network in France is a national policy which "aims to restore ecological continuity in order to promote the migration of species and the resilience of ecosystems to face habitat threats and climate change. It also aims to strengthen the place of nature in the city and public awareness." In Montpellier, implementation of "this project has improved knowledge of the city's natural heritage and enhanced ecological continuity, as well as protecting, and sustainably managing high-potential sites and integrating the social dimension, raising public awareness, the observation of nature"(Ref. 2).

The initiative is comprised of a project to recover the coastal line of Alicante, from El Campello to Elx (approx. 21 km long). The Municipality called an ideas' competition with the aim of developing a sustainable coastal corridor project that includes an intervention on the entire Alicante coastline and generates a continuous itinerary integrated into the landscape with new places of opportunity for the residents of the city (Ref. 7). The two-stage competition sought proposals for a new ‘coastal passage’ featuring the creation of new multi-purpose public spaces promoting biodiversity and accessibility (Ref 13). The winner was announced on the beginning of 2019 and the Municipality planned to start the development of the first 2 parts of the project. The winning project of the competition bears the slogan "My connected archipelago" and is the work of the Grupo Aranea and Subarquitectura studios from Alicante (Ref 14), a project that considers ecological and sustainable principles (Ref. 9).

The greening of the Bega channel is a project which dates from 2008 and which aims at cleaning and revitalizing the channel on a distance of 44 km, in order to improve water quality, increase economic activities related with the river, and avoid future floods of the area. Since the channel has not been revitalized from 1945, the 2008 project is seen as an important step in improving not only the life quality of the Timisoara's inhabitants but also a major step in including environmental issues on the official agenda of the municipality. (1)

Ecological parks are parks that reduce stormwater runoff and pollutant emissions. It refers to a number of techniques applied at the same time to reduce the total impervious surface of a parking space, the decrease in the surface temperature and maintain a green island in crowded areas. In Timisoara, until the date of this completed intervention (2009), there were located 11 ecological parking spaces, placed throughout the city, most of them near building blocks in former industrial quarters (3)

The River Alt Restoration Project at Stonebridge started in 2013 with an initial goal to remove culverts in order to create re-naturalised watercourses and maintain watercourses easier. It also involved the removal of rubbish and other obstructions to reduce the risk of flooding in the wider catchment (Reference 2). The project then evolved with a bigger goal to divert River Alt into a new 900-meter long linear park named Alt Meadows. Relevant engineering works were employed in the area. In addition, accessible paths and meadow, wetland and woodland habitats were created. The park was also linked into surrounding areas (like housing, shops, schools, etc.). The project benefits include the expected increase in wildlife biodiversity and improved water quality and flood protection (Reference 1, 3).
The project was led The Cass Foundation, in partnership with the Community Forest Trust, with funding from DEFRA’s Catchment Restoration Fund (via Environmental Agency) and Liverpool City Council. The Foundation remains responsible for maintaining Alt Meadows on behalf of the city council (Reference 3).

"After decades of abandonment and deterioration, Zaragoza took advantage of the opportunity of the Expo 2008, to form a new relationship with the Ebro River, transforming empty, inaccessible, degraded and unsafe banks into places of encounter and representation. Public works on the Ebro were designed as structures with various functions." (Ref.3)

Since 2012, Gothenburg has worked with the Rivercity, an urban development project in the city centre, that uses different ways of working, with innovation at the core of its urban transformations projects. Frihamnen is one of the RiverCity Göteborg most vital projects which aims to unify the centre of Göteborg across the river and out towards Kvillebäcken, Lindholmen and Backaplan (districts). The environmental goal is to create climate adaptation by flood control & stormwater management. Additional benefits of the project are to make the area more attractive and create recreational areas. As part of the BEGIN project, the Frihamnen project aims to use 'blue-green' solutions (i.e. Blue Green Infrastructure through Social Innovation). (Ref. 1, 2)

The aim of Ljubljanica Connects funded by Life+ is to improve connectivity between Natura 2000 sites. Started in 2012, the project aims to remove barriers to fish migration, enhance and restore habitats, improve water management infrastructures, and put in place a water monitoring system. This will restore the river Ljubljanica's function as a corridor, improve water management and so provide better links between Natura 2000 sites. The fish species in question are Danube Roach, Danube Salmon and Striped Chub (2).

The largest rain gardens in Sweden (thus far) has been created in Göteborg (Kviberg park). Kviberg's multisport arena was completed in the summer of 2015 in the northeastern part of Göteborg. Around the facility, there are parking spaces with a capacity for 500 cars. In order to handle the rainwater flowing from the parking area, approximately five per cent of the total area has been used for rain gardens, which both clean and store the rainwater. (Ref. 1, 2)

The Venice Lagoon is characterised by intensive agriculture and by a web of drainage channels discharging into the rivers. The Veneto Region, through the “Plan for diffuse pollution prevention and restoration of water in the draining basins of the Venice Lagoon” financed measures of re-calibration of riverbeds aimed at the renaturation of the hydraulic web, to increase the time of permanence of water and phytodepuration processes in the draining basin. This case study, in particular, includes measures on the drainage channels discharging into the Dese river, one of the main water bodies of the Venice Lagoon basin. In particular, it aimed at re-structuring the effluents of the mid-course of the Dese river (Rio S. Martino, Rio S. Ambrogio and Scolo Desolino). (1).