Increased protection against flooding

Trees and a park have been created and designed for the double building project called CEMAGREF/ENGREF in Clermont-Ferrand which was planned in 1994 (Ref. 2 and 4). CEMAGREF (Center for the Study of Agricultural Mechanization of Agricultural Engineering of Water and Forests) and ENGREF (National School of Agricultural Engineering of Water and Forests) are located within the IRSTEA (National Science and Technology Research Institute for Environment and Agriculture) (Ref. 3).

The Humberhead Peatlands are the UK's largest lowland raised bog complex and are part of the Natura 2000 network. They are located East of Doncaster and include the Thorne Moors and the Hatfield Moors (both towns are part of the Doncaster Borough). Commercial peat extraction has changed the hydraulic balance of the area, which impacts the condition of the peatland. This project aims to restore the water balance and thereby the peatland that can help prevent flooding, which is a breeding ground for the European nightjar, while also creating local jobs. The Humberhead Peatlands LIFE+ project completed its delivery phase in June 2019. (Ref 2, 3)

The project was part of a series of development projects which addressed the water management issues of the city. (Reference 1) The rehabilitation of a lake in the Adyváros neighbourhood included the renewal of the water reservoir, surrounding green areas, footpaths, and vegetation, as well as the installation of a new street light system, benches, trash cans, and unique street installations such as an interactive message board. (Reference 2) The interventions transformed the lake and its surroundings into a popular recreational area, frequented by locals. Since the completion of the project in 2014, there have been minor developments to the lake and its area, such as the renovation of the playground. (Reference 4) Apart from Adyváros, several other lakes were rehabilitated in several neighbourhoods (Adyváros, Győr-Szabadhegy, Marcalváros). (Reference 6)

Győr and its surroundings boast many rivers, streams and lakes, and experiences intense flooding almost every year. The main goal of Nagy-Pándzsa project was to reduce the risk of flood and to regenerate the Nature 2000 area (Reference 7). Due to the reconstruction of the water transporting feature and the reconstruction of the flood-gate, the flood protection could improve and the pollution of waters could decrease. Therefore, the conditions of flora and fauna of waters improved and the size of the utilizable area increased (Reference 8).

This project worked to revitalize the area along the river Old Ponávka. This involves the creation of walking paths, bike paths, and public playgrounds. (Ref. 1). Stará Ponávka and the adjoining Svitavy drive were built in the 13th century in the original riverbeds of Ponávka and Svitava before their regulation. By revitalizing this watercourse, the city returned water back to the city, made it accessible to people and improved the natural state of the site (Ref. 14).

The Bio Washing Machine is a combination of an Aquifer Thermal Heat Storage (ATES) system and biological natural attenuation of groundwater and is thereby mainly focused on groundwater decontamination and energy storage. The ATES system accelerates the biological degradation of groundwater contamination and provides sustainable energy because cold water is pumped through buildings during the summer to cool the buildings and hot water during winter for heating. The groundwater decontamination measurements are aimed at protecting water in order to provide safe drinking water (ref. 1, 2, 3)

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 Fechenheimer Mainbogen is the largest undeveloped floodplain area in Frankfurt am Main and a special recreational area in the Frankfurt Green Belt Internal link. Today, the Main Arch is mainly used for agriculture, but still contains numerous relics of a typical floodplain landscape, such as smaller floodplain trees, meadows and wet bank areas. Since 2015, the curve of the Main has been transformed back into a near-natural meadow landscape with water, alluvial forests and meadows in several steps. Animals and plants are given new valuable habitats and places of retreat, and people are given attractive recreational spaces in nature (10).

"This disctrict of "Plateau de Haye" is part of the EcoQuartier approach, is one of the most ambitious urban renewal projects. In line with the development of the New Urban Renewal Program, work was carried out this year [2012] on the challenges of opening up territory to its urban and forestry environment in order to confirm the "Forest City" approach initiated by the architect-town planner Alexandre Chemetoff" (Ref. 1). It received the EcoQuartier National Grand Prize (Ref. 2). A forest, community gardens and a green corridor are being developed with a rainwater recovery system (Ref. 2). Work is set to continue until 2024 (Ref. 10). "It will first allow work to be done on the functionalities of the district : development of spaces freed up by the demolition of the Blanc Sycamore and the Purple Beech, reconversion of the Tamaris and Ombelles into housing, shops and spaces dedicated to companies, creation of green spaces , shared gardens and parking" (Ref. 10).