Restore wetlands and/or coastal ecosystems to dissipate the effects of flooding and/or storms

The project relating to the waterfront of San Girolamo di Bari is an important piece of the mosaic that provides a new design for the entire city waterfront, from North to South: Santo Spirito, Palese, (precisely) San Girolamo, the connection between Bread and Tomato and Torre Quetta, temporary uses on the San Giorgio waterfront, up to the redevelopment of the South promenade. The project which is almost completed, regenerated the seaside part of Bari, making the seaside accessible and link the city with the coastal area by creating a multi-functional space where playgrounds, a cycling path and green open spaces were built to enhance the liveability of the area. In this way, what was previously considered just as an economic and working part of the city became a new center of social interaction by creating a new institutional green space. (Ref.1, Ref.6).

The Seven Lochs Wetland Park is an urban park that is due to be created in Scotland. It will comprise nearly 20 km² of land and water between Glasgow and Coatbridge. The park will combine many existing features, including four local nature reserves; Bishop Loch, Cardowan Moss, Commonhead Moss (a raised bog) and Hogganfield Park; Drumpellier Country Park which includes Woodend Loch SSSI and Lochend Loch; Frankfield Loch; Johnston Loch; Garnqueen Loch; Provan Hall a 15th-century category A listed building. It will be Scotland's largest urban heritage and nature park. The vision for the Seven Lochs Wetland Park is of a new park of national significance, sustaining and enhancing a high quality, innovative wetland environment that will (a) protect and enhance biodiversity and heritage (b) promote health and well-being (c) contribute to environmental, economic and social regeneration (Ref 1).

The surface water system in the VINEX location Leidsche Rijn near Utrecht is a special water system. Nowhere in the Netherlands is the surface water of such a large urban area treated in such a sustainable and climate-proof manner (ref. 2). In Leidsche Rijn, a relatively new city district of Utrecht, a sustainable closed circuit water system was introduced including natural wetlands, bioswales, pumping stations and permeable paving which filters stormwater organically. It is viewed as a more sustainable solution compared to traditional stormwater infrastructure because it benefits biodiversity (e.g. by means of fish passages) and prevents the need for storm water facilities and the influx of unfiltered surface water from elsewhere (ref. 1-3).

The Water of Leith is home to a wide diversity of plants and animals. The river performs an important flood control function in the city. A management plan envisions to create a healthy river that flows through a green corridor from the hills to the sea and is a haven for wildlife, is enjoyed and managed by the public, and is valued for its built and cultural heritage. The current intervention is about an extensive Flood Prevention Scheme. Walls and other flood defence measures have been constructed from Murrayfield downstream to Bonnington. A re-modelling exercise is being carried out to include the impact of climate change on the river system and the efficacy of the flood prevention scheme. The Water of Leith Conservation Trust works to conserve and enhance the river, its heritage and wildlife. It also promotes education and recreation and works with volunteers and community groups (ref 1, 2, 3).

The £1 million project aimed to transform the area from arable land to a high-quality wetland by creating a number of interconnected reed beds and water bodies. The project recreates part of the old wetland landscape that used to exist on the edge of Doncaster 200 years ago before it was drained for other uses. A major benefit of expanding the wetland will be to provide better quality water for local communities and reduce the impact of flooding in the area. The project is a collaboration among WWF, HSBC, Yorkshire Wildlife Trust and the European Union. (Ref 1)

The once rich in fish Nidda river in the north of Frankfurt was canalized and dammed in the 20th century. River loops were pierced, filled in or made into oxbow lakes. Newly built weirs stopped the fish migration. The expansion provided good protection against flooding, but the river became a canal (2).
In the 1990s, the Nidda neighbours developed a program for the renaturation of the river, the concept "Natural Nidda". It was decided by the city council of Frankfurt am Main in 1998 (2). The project consisted of many measures aiming at the restoration of the natural course and ecosystem of the Nidda river, the creation new habitats for flora and fauna, the expansion of the floodplain area and thus the river's retention capacity, the deconstruction of weirs, the renovation and building of bridges and the reconnection of disconnected branches of Nidda. Besides the environmental aspects, another project goal was to make the riverside more accessible for local offering various ways for relaxation and recreation. (2,7)

"On June 1st 2017, Saint-Etienne Métropole officially committed itself to the implementation of measures to promote the circulation of wildlife between the different green spaces with important biodiversity in its territory" (Ref. 3). "Saint-Etienne Métropole has signed with 13 partners a new contract called "green and blue". It is a new blue and green framework for the whole territory, a regulatory tool for the protection of biodiversity" (Ref. 2). "It aims to continue and reinforce the actions already undertaken with a transversal and urban dimension" (Ref. 2).

The Braid Burn is a highly urbanised watercourse that has been significantly modified to improve drainage. Prior to re-meandering of the Braid burn, it was constrained in a narrow, brick-lined channel with little character, offering a poor habitat and possessing low species diversity. The restoration work reintroduced diversity to allow natural morphological and ecological processes to take place (ref. 2). A new wetland habitat was created, along with a flood storage area. It was a small component of a wider flood alleviation scheme by the City of Edinburgh (ref. 1).

“An integrated solution for groundwater, rainwater, waste water, streams and ponds creates attractive housing in a new suburb (NyE), with room for exciting architecture. The water cycle plays a key role in urban development in Denmark, and water is one of the ever-present elements in our lives. Århus needs to prevent flooding caused by climate change, avoid polluting our groundwater, and improve the environment in streams and ponds to allow the use of water to create recreational value for the residents. This way, Århus can build a balanced aquatic environment, which will ultimately create a better city.” (Ref. 1)

The establishment of the first stage consisting of 650 homes, day care center and grocery store was initiated in the autumn of 2016 after more than 10 years of planning, and in the summer of 2018, the first residents moved into Nye. More homes are on the way. (Ref 14). In its current form of just over 150 ha, it has a capacity of approx. 15,000-20,000 inhabitants or approx. 10,000 homes at full expansion (Ref 15)

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)