Improved water quality

The Project "Let's Open the Walls" is an integrated program of urban and social regeneration interventions that aimed to revitalize a portion of the Venice Commune (that is, one in the former neighbourhood Quartiere Due: Dorsoduro, Santa Marta, Giudecca, Santa Croce, San Basilio). The program, promoted by the City of Venice and funded by the Ministry of Infrastructure and Transport in 2004, provides for social inclusion and the weakest sections of the population and involved several interventions, including the planting of trees and the creation of green spaces for social activities. In particular, the Urban Italia program addressed to Venice is named: “Apriamo i Muri” (Opening the walls). It refers to the work-field “Quartiere 2” (District 2), in which are concentrated many actions that the city Administration has planned and approved during these last years. The Administration's objective was to transform and revitalize the degraded areas of the Venetian historical center, also through innovative actions. The program aims generally at urban, infrastructure and social regeneration of the Quartiere 2, moreover, it responds through articulated specific works to the critical complexity of the area. (1 and 4).

The reserve is a biodiversity hot-spot within Cardiff Bay. The reedbed and other aquatic plants, are very productive vegetation and a habitat for birds. Prior to the construction of the Cardiff Bay Barrage, it was made up of mudflats and salt marsh. (Ref 1) The site was chosen by Cardiff Harbour Authority to create a new environment and compensate in part for the loss of the mudflats which were submerged after completion of the Cardiff Bay Barrage. Floating timber structures serve as breeding areas for birds, an underwater bund prevents wave erosion, and a boom keeps out waterborne debris (Ref 5).

The project involves the BBC Drama Village - a combination of studios and stores with associated offices and technical suites. It was the requirement for all buildings to achieve a BREEAM Excellent standard (ref 1). GreenBlue Urban structural RootCell systems were used for this development to create adequate tree root volumes, to ensure optimum tree establishment and growth in a demanding coastal location (ref 2). A Living Wall has been made which has a number of functions including the provision of a new home for solitary bees, lacewings and other invertebrates. A rainwater harvesting system has been installed (ref 1). Speaking generally, the studio, stores and office amounted to over 18,000 square meters and 900 new meters of HV, gas water drainage and telecoms (ref 1). Areas of eco-design include transportation, energy efficiency, water efficiency, materials, indoor environmental quality, waste reduction and biodiversity (ref 1).

The project aimed to improve the Owler Beck riverbody catchment in Wakefield. Data collected by the Environment Agency revealed that the Owler Beck catchment is struggling to achieve the 'good ecological status' needed in order to meet the European Water Framework Directive. This is likely due to years of alterations that have removed the diversity of the environments and left the watercourse silty. The project aimed to address these issues by working on the priority sites along the river. A multi-phased scheme had been designed to relieve these pressures and deliver benefits for both people and wildlife across the catchment. (Ref. 1) The project is completed as of 2019 with 200m of river reach length covered in the catchment area. (Ref 7)

The renaturalization of streams is a common strategy for improving the ecological quality of water bodies as mandated by the European Water Directive. For that reason, parts of the Aa stream in Münster upstream until its flow into the Aa lake covering 2.6 km were renaturalized from 2012 to 2013. Renaturalization is a means to restore the natural river banks, local ecosystems of the Aa rive and improve the water quality of the Aa lake (Ref. 1 and 3).

The Restoration of degraded wetlands in Wolfschlugen (in the administrative district of Stuttgart) was conducted within the wider regional level of sustainable urban development to enhance resilience, protect the city from flooding, support sustainable development, and safeguard biodiversity. Ditches and craters line the 700 metres long and 50 - 70 metres wide strip of landscape northeast of the development boundary behind the Wolfschlugen forest cemetery. This is formed by the Riederwiesen, which absorb water to protect the place from flooding. The wetland should protect people at least during a so-called hundred-year flood and at the same time offer animals and plants a habitat. (ref 3, 11)

A long-awaited flood defence scheme which is designed to protect the city from a repeat of the devastating floods in 2007. "The ambitious project has taken 14 years of planning" and will protect the city's gateway (Westgate). The project manager from EA, said: "The work we're doing on the Ings Beck scheme will mean Wakefield is protected against the kind of flood that only has a one in 100 chance of happening in a year." The scheme involves solving the flooding problem and encourage wildlife habitat. (Ref. 1)

Bute Park is a riverside green spot with an arboretum and gardens, containing a broad range of ecosystems supporting a wide variety of living species (ref 4). The historic Mill Leat had been dry since the 1970s."The word "leat" refers to "an open watercourse conducting water to a mill". The Mill Leat sits on the same site as a former millpond at the end of the original medieval millstream. It supplied water to corn mills located to the south of the Wst Gate and contained water well into the 1970s." (Ref 10) .Mill Leat Restoration or the re-flooding of the dry water body was a major deliverable under the Bute Park Restoration project (ref 2). In 2013 the overgrown channel was excavated, lined and refilled with water as part of the Bute Park Restoration Project (Ref 2). It enhanced the character of the park and provided a new habitat for wildlife (ref 1). Now re-flooded, Mill Leat is self-contained, self-regulating and self-circulating. It has reduced the risk of flooding and created a sustainable water feature (ref 2).

The historical canal that was disconnected by a road in the 1970s is currently being restored by the municipality, creating a lively atmosphere allowing for water recreation, a boulevard and green spaces (ref. 1). A small element of this restoration is the addition of green elements by a citizen group, which entails improving ecological, aesthetic and historical quality of the canal by implementing eco-friendly riverbanks, green connecting zones and floating vegetation islands (ref. 3,9,11,12).

The project aimed to test the potential to use existing surface water drainage charge mechanisms to incentivize increased implementation of Sustainable Urban Drainage Schemes (SuDS) to improve flood resilience and improve water quality in the city of Manchester (ref 1). Working with partners from The Water Taskforce, and funded by the DEFRA (Department for Environment, Food & Rural Affairs, UK Env agency), BITC (Business in the Community) and CLASP, these partners have been testing the concept that implementing SuDS on a school site could generate savings for a school, by reducing their hard-standing area and so their charges from their water supplier. Working with two schools in Manchester, the project team carried out detailed audits and SuDS interventions were identified that could divert or slow the flow of water into the sewer system, or reduce the amount of chargeable hard-standing area. Using this information, a trial version of a simple, user-friendly tool has been developed to help schools identify if there may be a cost-effective way to drop a chargeable surface water band (ref. 2).