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Tagabe Riparian Corridor Regeneration Project

The Tagabe Riparian Corridor Regeneration Project is an integrated catchment project ‘designed to build resilience into the riparian system to safeguard human wellbeing in the face of current and future climate change challenges and key population/ resources demands’ (Ref. 4). The project is focused on the ‘riparian margins of mid to lower catchment streams in the Tagabe catchment’ (Ref. 4,5). Activities consist of ‘riparian revegetation and stream bank protection; sustainable land management of adjacent farmlands; and point source pollution prevention and remediation’ through a series of 5-year management periods (Ref. 4,5). The project was part of the larger PEBACC (Pacific Ecosystem-based Adaptation to Climate Change) project and is now supported by the Vanuatu Government and various other initiatives like the Pacific R2R – Ridge to Reef programme (Ref. 8,9).

ACROS Fukuoka Prefectural International Hall Step Garden

The 'Step Garden' is a 14-tier green roof atop the Asian Cross Roads Over the Sea (ACROS) Fukuoka Prefectural International Hall in Fukuoka, Japan (Ref. 2). The Hall itself is a centre of international, cultural and information exchange, and sits amidst the Tenjin Central Park (Ref. 3). As the building displaced a plaza, the architect, Emilio Ambasz, created the “image of a mountain" through the design and installation of the roof terrace (Ref. 2), "want[ing] to give back to Fukuoka’s citizens all the land the building would subtract from the city" (Ref. 3). In combination with the Central Park, the rooftop garden is considered to be the only open green space in the city centre (Ref. 4), and since its inauguration in 1995, has been open to the public, accessible via two entrances on the park side of the building (Ref. 1).

Integrated Protective Coastal Zone

A combination of green and grey coastal infrastructure is being developed off the coast of Semarang, Indonesia in response to the increased risk of coastal flooding as a result of sea-level rise (Ref. 1). Due to its geography as a coastal city, "Semarang deals with various physical challenges...such as tidal flooding, erosion, land subsidence and rising sea levels" (Ref. 1). Tidal flooding is becoming increasingly worse as a result of climate-induced sea-level rise and increasingly extreme weather events (Ref. 1 and 3). Coastal protection which was historically afforded by naturally occurring mangrove systems has been reduced as a result of the mangroves being largely lost to urbanisation, fish farming and other forms of agriculture (Ref. 2). One proposed sub-project of the Integrated Protective Coastal Zone, Coastal Balance Project 01: Coastal Balance Pilot in Genuk/Sayung, will focus on the northeast of Semarang. Using the 'Building with Nature' approach, it will leverage nature-based solutions through the deployment of green infrastructure, primarily focusing on mangrove restoration (Ref. 3). Mangrove restoration is hoped to stabilise the coastline, therein reducing erosion, encouraging sedimentation and increasing resilience against sea-level rise (Ref. 3).

Sweet City: a city modelling approach for pollination

In 2015 an innovative project called the "Sweet City" (Ciudad Dulce) was launched in Curridabat. Its main goal was to bring wild spaces into 21 urban neighbourhoods of Curridabat ("spaces of sweetness") and eight corridors ("transitions") and thus linking neighbourhoods and parks through a participatory re-design approach with local stakeholders [3]. The main objective of the Sweet City model is to reintroduce biodiversity into the urban space by focusing on five fundamental dimensions: Biodiversity, Infrastructure, Habitat, Co-existence and Productivity. The interventions of this project included park improvements, sustainable drainage systems, the protection of wetlands, spring water recovery, promoting organic farming practices, and many strategies that help improve biodiversity and motivate citizen participation, finally, as ecosystem-based disaster risk reduction measures and climate change adaptation actions [1].

Green Roof of Victoria's Parliament House building

In 2018, a new annexe building to the Parliament of Victoria was built to host the increased number of municipal employees. The new building is located in the heritage garden that surrounds the parliament precinct of which one hundred per cent of the footprint has been crowned with two new flourishing rooftop gardens that merge the building into its extraordinary landscape setting (1). The new garden is one of the biggest rooftop gardens in Melbourne and accommodates 300 mostly native plant species that characterise the Australian meadows with wildflowers, grasses and shrubs (2). During the construction of the annexe building and the landscaping of the rooftop garden and the connected sunken courtyard key elements of the heritage garden were protected as touchstones for example a Federal Oak planted in 1890, a Norfolk Island Pine and a camphor laurel ( 7). The garden encourages greater biodiversity within the dense urban context, provides thermal insulation to the new building and creates social spaces for events, announcements and contemplation (2).

Water Forest Initiative

The Water Forest region covering around 250,000 hectares in the hinterland of Mexico City provides 70% of the city's urban water demand through the aquifers located below the forest. It consists of forest fragments and grasslands, encompasses four mountain ranges, and two adjacent Mexican states – Morelos and Mexico State with national parks (2). However, as native grasses are replaced by human settlements and poorly sited tree-planting projects, water available to recharge the aquifers declines and their loss contributes to flooding in densely populated urban areas downstream (1, 2). The Water Forest Initiative initiated by a non-governmental NGO aims to develop and implement "a regional conservation strategy to provide water and other ecosystem services to Mexico City (CDMX), Mexico State, and Morelos through the protection and rehabilitation of the Water Forest Area" (1 p6).

Two Rivers Urban Park

Two River Urban Park is a public space located towards the confluence of the Liesbeek and Black Rivers and is one of the largest urban green lungs in the City of Cape Town. It is approximately 240 hectares in extent. The Park comprises sensitive ecological systems and habitats, extensive open space areas, institutions, historical buildings and cultural landscapes (2). The City of Cape Town and the Western Cape Province own significant proportions of the park and in 2011, the Western Cape Government started considering the sustainable redevelopment of the TRU Park into a mixed-used urban green area including housing development, heritage protection, the rehabilitation of the degraded environment and recreation opportunity creation (1). Since 2016, the project has been on hold due to the modification of the planning law Local Spatial Development Framework that affects the redevelopment plans of the Two Rivers Urban Park (1).

The Forks and the Winter Waterfront

Winnipeg lies at the confluence of the Assiniboine and the Red River, a location known as 'The Forks', which is the cultural centre and meeting place of the city. "The winter use of the river went through an unprecedented change over the last 10 years, organized by a private company (The Forks North Portage Partnership), that began to operate the 'Red River Mutual Trail', the longest Guinness World Record-holding natural skating trails on the Red and Assiniboine rivers, offering opportunities for skating, curling, cycling, walking, and cross-country skiing, along with cultural events and unique, community-designed warming huts, a restaurant on ice, art exhibitions and other activities. The river trails also links otherwise distant neighborhoods, and functions as a transportation and commuting route with a variety of access and exit points during the city’s typically 4-5 months of winter climate." (Ref.1 p60)

Climate Adaptation Strategy

The Climate Adaptation Strategy (CAS) was approved in 2016 and it includes various measures that aim to address various urban challenges (e.g. temperature rise, heat waves, heavy rainfalls, flooding)(Ref. 1, 2). The CAS is considered a key instrument for integrating green and blue measures in comprehensive planning.
Here, the NBS is presented with a focus on two specific measures: (Reference 1) Integration of the Urban Climate Map in urban planning, focusing on the preservation of existing air corridors/channels through open green spaces. (Reference 2) Integration of other climate adaptation measures in urban planning instruments through open green areas, community rooftop gardens, trees, and water elements. (Reference 1)

Gorla Maggiore Water Park

The Gorla Maggiore water park, inaugurated in March 2013, is situated within the municipality of Gorla Maggiore, in the Italian region Lombardy, located about 30 kilometers northwest of Milan. The water park is a constructed wetlands (CW) built on the banks of the Olona river that includes (a) a pollutant removal area composed of a grid, a sedimentation tank and four vertical sub-surface flow constructed wetlands; (b) a multipurpose area with a surface flow constructed wetland or pond with multiple roles; and (c) a recreational park with restored riparian trees, green open space, walking and cycling paths. [1]