Improved water quality

Sweden's largest real estate company, Vasakronan, tests its first green outdoor facade at Kyrkogatan in Göteborg. The project was implemented with aim of improving the local climate and contributing to a more sustainable and resilient city. (Ref. 1)

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).

The project LIFE SeResto (LIFE12 NAT/IT/000331) aimed to trigger a process of aquatic recolonisation in “Northern Lagoon of Venice”, mainly through the transplantation of "Zostera marina" and "Zostera noltei" to small sites distributed throughout the area. The proposed intervention technique involved transplanting a small number of plants, with advantages in terms of lower costs and impact on the donor sites (1).

Bjerkedalen is a recently constructed park around the Hovin creek in Bjerke District. It is situated in the middle of a settlement block, which used to have few public spaces. The park now acts as a recreational area with lots of green space, a river and several facilities for outdoor activities. The construction of Bjerkedalen park incorporated the installment of several important blue-green structures and features such as planting native trees and plants along the river, providing open grassy areas as well as reopening the Hovin river from underground pipes, with the aim of improved water quality and flood prevention.(Ref. 2)

The project involved the redevelopment of old military infrastructure at the periphery of the Zagreb city (Boronaj) into a green and carbon-negative university campus. The Boronaj campus has planned to be the green campus of the university and includes the use of renewable energy (biomass, geothermal and solar), treatment cell for wastewater and a huge green area (with trees and shrubs). The buildings (constructed and to be constructed) are planned to be carbon negative (Ref 1). A significant portion of the campus is the green areas (with trees and shrubs). This was created with the aim to contribute and maintain the native species diversity (Ref 3, 4). In addition to increasing the biodiversity of the city, the tree species has improved the air quality of the area and reduced the local air temperature. The project is partially completed. Some buildings are yet to be constructed. The Campus was officially opened on October 12th 2007 and for now, it hosts 4 university units: Centre for Croatian Studies, Faculty of Education and Rehabilitation, Faculty of Traffic Engineering and Faculty of Economics and Business (only vocational study programmes in economics and business). Five other faculties are also planning to relocate to the Campus in the next few years. Besides the (re)construction of university buildings, campus will be home to a sports centre, student residence hall and a number of institutes. The project is partially completed, some of the buildings are completed while some are yet to be constructed. (Ref 1, 3, 7).

The rain gardens of the Great Mosque give an example of a sustainable urban drainage system built 1000 years ago (Ref.1,8,9). The Great Mosque is a world heritage site by UNESCO (Ref. 1); therefore the rain gardens are protected and will continue to provide a sustainable irrigation system needed for the arid climate of Andalusia (Ref. 8,9).

Bundek Park is one of the urban planning projects aimed to create a recreational and sports area for the citizens and tourists to support a healthy lifestyle (Ref 3). The lake is surrounded by Bundek Park which stretches for 2,000 meters in length with an area of 35 hectares. The lake is about 5 hectares. the lake was initially used for fishing, walking and swimming. With the increased and carefree use of the lake, the lake and the environment became a waste disposal site. In 2005, by the decision of the Mayor, Mr. Milan Bandić, the renovation of Bundek began. The project included cleaning of the informal waste disposal site and shrubs blocking access to the lakes, renovation of the access to the lakes, planting flowers and introduction of the benches and water also to allow citizens to use the lake for recreation and enjoy the nature (Ref 2).

Fornebu used to be Norway’s main airport, but was abandoned in 1998. The Fornebu project aimed to restore the 340 ha site in order to provide a sustainable, multi-use built environment with sustainable drainage systems and other green infrastructure in focus. The site now consists of residential and industrial buildings with a focus on green space and natural storm water management, involving the use of open and natural water retention methods, including swales, filter strips, permeable surfaces, detention basins and retention ponds (Ref. 1).

The Sotos de la Albolafia Natural Reserve is situated on a section along the Guadalquivir River, that runs from the Roman Bridge to the San Rafael Bridge (Ref. 3,14). It was declared Natural Monument in 2001 and is part of the Network of Protected Natural Areas of Andalusia (RENPA) due to its wide variety of birds (Ref. 5,15). "The declaration recognized the environmental value of the Sotos de la Albolafia, a singular natural enclave located in the urban center of a large city, in a monumental and historical environment also unique and with an unparalleled concentration in protected species, especially water birds and wetlands." (Ref. 3)

A water park has been constructed for the treatment of the pumped groundwater and stormwater from Roslagsvägen. A sedimentation basin is being built by the Swedish Transport Administration in connection with the construction of the Northern Link. The stormwater is led via an overloaded sedimentation basin, which is also supplied with large amounts of leaking groundwater from the metro. The goal is to reduce the phosphorus supply by about 25%. (Ref. 3,4)