Water management (SDG 6)

The project regards the creation of a natural park close to the Orteto river, which crosses the city of Palermo. The problems of the area mainly concern the housing development, which was increasing during the years without considering the potential negative environmental impact. The creation of the park is expected to be a solution to face the challenges created by the unsustainable development of the area. It would be an opportunity to regenerate an area where intervention is needed, providing additional ecosystem services such as coastal protection, and improving air quality. (Ref.1.)

The garden is an opportunity for training, leisure and coexistence where the teaching of ecological gardening is combined with the love of plants and the social use of land. Consolidated in just one year as a training point for the unemployed without losing that playful-neighborhood component with which it opened its doors. In it the volunteers develop a methodology of teaching that facilitates the socialization and the reintegration work when acquiring knowledge in gardening and carpentry. (ref 1)

The Rohrschollen island, located near Strasbourg, is representative of a particular environment in Europe: the Rhine alluvial forests. These forests are known for the exuberance of their vegetation and their richness of species: it is a rare ecosystem both at the national and European level. These forests are regressing nowadays and as a result, the four major European rivers from the Alpine range (Rhine, Rhone, Danube, Po) have lost most of their riparian forests. The objective of the project is to restore a dynamic flood regime on the island of Rohrschollen that is modeled on the Rhine's hydrological rhythm (Ref. 1).

The Development of the Garden of the Schloessel project is part of the Natural Urban Park project undertaken by the City Council in consultation with the Strasbourg Urban Community (Ref. 3). The project aims to reduce the carbon footprint of the area by installing and redeveloping green spaces in the garden as well as providing the site with stormwater management infiltration (Ref. 1).

The San Rafael Park is an urban park and commemoration site built over former communal graves containing more than 2000 bodies of victims of the Spanish Civil War and the Franquista regime. The large project has had 4 phases, three of which have been completed, including the building of a Historical Memory Pantheon to commemorate the victims in the communal graves exhumed from the grounds where the park now stands. (ref 1) In these phases are numerous reforestation and water preservation plans (ref 1-7) including the gardening of more than 4,000m² of green area with 104 shade trees, 8 palm trees and more than 400 units of shrubs, in addition to covering the rest of the surface with perennials and meadows (ref 3).

The rehabilitation of the main road Alameda Principal seeks to invert the previous distribution of use of space that saw 70% of it devoted to car usage and 30% to pedestrian use, after the intervention the situation should be 75% civilian and pedestrian space and 25% for cars. (Ref. 4,5) More public spaces, green areas, walks, bike lanes and leisure facilities will characterize this action, which also prioritizes highlighting the identity of this area of the city and value its architectural elements, patrimonial, wooded vault and cultural links. (Ref. 4)

Working with Cardiff local authorities, Dwr Cymru Welsh Water's (DCWW) upgraded Trelawney Avenue to its RainScape Sustainable Drainage System (SuDS) (Ref. 4) which alleviated risk to residents and nearby highway which were at a 2 in 10 year flood risk (highly-risky) (Ref. 3). Flooding commonly occurred due to rainwater run-off from the roofs and roads of upstream catchments that drained into a combined, overburdened sewer network. Traditional systems of increasing pipe-size and storage were not cost effective (Ref. 3). A sustainable solution was developed which combined road surface drainage (gullies and slotted grates) and provided water-butts (200 liter reservoirs for roof drains) to 101 properties in Trelawney Avenue and to 75 properties in the upstream catchment (Ref. 3). Additionally, a wall was built to protect properties from the potential effects from surface water run-off (Ref. 1).

The project of Nature Oasis Auwiesen is creating new habitats for animals and plants in Stuttgart. The project is one of a total of six “Neckar pearls” that are to be completed by 2022 as part of the Neckar Landscape Park master plan in Stuttgart. In the project with a predominantly ecological focus, grassland in the Neckaraue near the Aubrücke is to be transformed into a near‐natural, ecologically valuable wetland biotope. In the course of straightening the Neckar, the wet and floodplain biotopes that were typical and widespread in the floodplains have been lost. The aim of the project is to restore these habitats for animals and plants, which have become very rare today. A network of marshes, water surfaces, islands, and bushes is to be created in the district of Hofen. On an area previously used as grassland, new habitats will be created for rare animals and plants, which are dependent on water areas. Initially, the planned implementation time was 2016-2022, but now it has been delayed and is expected to start by the end of 2021. (2, 7).

On November 5, 2019, the Committee for Urban Development and Technology passed the building decision for the riverside park Austraße - Neckarterrassen. To the north of Münster, the Neckar has cut deeply into the shell limestone and describes a wide arc on the Prallufer. There is little space between the cliff and the river - that is what makes this place so special. This is where the Austraße riverside park is being built with the elements Freienstein water playground (element 1), Neckarterrassen and Tapach-Link (element 2) as well as Austraße, Neckarufer and Neckarstrand (element 3). The first component has already been implemented: children will find their favorite spot on the Freienstein water playground south of the Max-Eyth-Steg. Students from the Elise von König School in Münster contributed their ideas as part of a child participation program. With the second component and its sub-projects “Tapach-Link” and “Neckarterrassen”, there are beautiful prospects for Münster: Those who have overcome the relay to the Neckarterrassen can rest in the shade and let their eyes wander up and down the Neckar. The third component of the Austraße riverside park - in addition to the Freienstein water playground, Neckarterrassen and Tapach-Link - focuses on the banks: podiums and platforms are planned on the river to linger while the freighters transport their goods on the water. Insects, small crabs and small fish find optimal living conditions on the renatured bank zones with stones and diverse flora. (1, 7).

The winners of Smogathon 2016 suggested building a large green wall in the centre of Kraków. Based on the modern technologies the artificially placed wall made of metal and moss would clean local air, lower the temperature, retain water, increase biodiversity and serve as a decoration for the city centre [1,2]. The project was not completed due to lack of scientific data on its effectiveness and the weak price and outcomes balance; the city is still searching for more economical and practical solutions [6].