Tagged: river restoration

London Rivers Week: Hogsmill River restoration

Building on the success of last year, London Rivers Week, 26th June to 2nd July, 2017 aimed to encourage Londoners to take pride in the city’s waterways, understand the challenges they face and come together to create a healthy future for our rivers.

During the week City Hall held a conference entitled “Why Restore Rivers?” where developers had the opportunity to listen to the benefits of including river restorations. A brief document called How River Restorations Enhance Developments in London, outlining some of the benefits of such work, is now available.

London Rivers Week showcases some of these newly restored natural spaces and raises awareness about how they are vital for Londoners’ wellbeing. Environmental organisations including the Zoological Society of London, London Wildlife Trust, the Environment Agency, Thames Estuary Partnership and the South East Rivers Trust have all joined forces with Thames21 and are putting on free events during the week.

image1

Click on the map to read about 23 projects where you can visit to escape the city and get beside rewilded rivers, including 2 projects close to Kingston University. The Hogsmill River runs directly past the Kingston School of Art Faculty and the university’s Sustainability Hub the Biodiversity Action Group has worked with The South East Rivers Trust, constructing a natural riverbank to increase habitat provision and improve its appearance. Over three phases, timber deflectors were introduced, brash and gravel added to the river and then planted. Read more here: Hogsmill River transformed into wetland and Hogsmill River transformed into wetland – revisited

30 June1

Mayesbrook Climate Change Park

Restoration of the Mayes Brook in Mayesbrook Park, in the London Borough of Barking and Dagenham, was an opportunity to create an ecological and community focal point within a broader environmental regeneration project. It was designed to produce the UK’s first climate change adaptation public park. This restoration of an urban river within a barren park landscape is a good example of an approach that combines flood storage, biodiversity enhancement and adaptation to climate change within a city environment. This study explores some of the key benefits of the planned river restoration and the wider park ‘greenspace’ improvements, in terms of their impact on ecosystem services. The urban setting means that restoration and improvements contribute to ‘regulatory services’ (regulation of air and water quality, microclimate and flood risk) affecting the local community. Enhanced recreation and tourism (cultural services) are also likely to bring benefits, since many people in the borough lack gardens or ready access to other green spaces.

myersbrook1

Robert Oates, Executive Director of the Thames River Restoration Trust introduces a field visit. Source: Ecosystems Knowledge Network

The benefits for ‘supporting services’, which are hard to quantify but important in maintaining ecosystem functions, are significant in terms of nutrient cycling and providing habitats for wildlife. This latter ensures there are animals and plants capable of colonising the wider landscape as the habitat improves. These improved habitats also serve as ‘stepping stones’ for wildlife to move across and between limited and fragmented suitable habitat in the urban landscape. Due to the urban setting and lack of biodiversity in Mayesbrook Park and the Mayes Brook, restoring the river does not boost ‘provisioning services’ (things that can be taken from ecosystems to support human needs, such as fresh water, food, fibre and fuel, and so forth). Many of the more important benefits of the Mayesbrook Park restoration can be seen in social and health aspects, enhancing the quality of life in the borough and the wellbeing of local communities.

In fact, if the annual value of services to health, risk and culture are pooled, despite there remaining many unmeasured or possibly unquantifiable benefits, they will account for over 90% of the total annual ecosystem service benefits for the Mayesbrook Park restoration scheme. The overall benefits are substantial relative to the investment. The lifetime value of restoring the site across the four ecosystem service categories (provisioning, regulatory, cultural and supporting) yields a grand total of calculated benefits of around £27 million, even if ‘likely significant positive benefits’ for the regulation of air quality and microclimate are excluded. This is compared to the estimated costs of the whole Mayesbrook Park restoration scheme at £3.8 million including the river restoration works. This produces an excellent lifetime benefit-to-cost ratio of £7 of benefits for every £1 invested. Urban river restoration would therefore be of major public value, fully justifying the planned investment and providing firm evidence that investment in urban ‘green infrastructure’ is highly favourable for the health and wellbeing of local people and the economic improvement of deprived wards. Restoring the vitality and function of the natural environment tends to enhance or maintain benefits across all ecosystem service categories. This contrasts with traditional single element solutions, which tend to maximise only the targeted services and often are associated with unintended consequences for other interconnected services. The case for the application of ecosystem-based solutions to environmental management problems is thus substantiated.

myersbrook2View of one of the lakes to be restored. Source: Thames Rivers Trust

The study sets out a range of options for further enhancing public value from
the restoration scheme, through new or redesigned initiatives or in management
practices. These include:

  • enhancing the hydrological function of the whole park landscape and infrastructure
  • using reed bed filtration to improve water quality in a bypassed reach of river and at lake inflows and outflows
  • improving climate regulation through energy-efficient building design, installation of renewable energy sources and reusing tree and other park trimmings as biomass fuel (or mulch) on site
  • optimising park restoration design to provide health and educational resources to the local community.

Assessing the ecosystem service implications for all of these options, and others that may be identified in later phases of planning and research, would help to support the economic case for their implementation. This case study provides evidence to help improve the current scheme design and the greater integration of social, economic and ecological benefits in future initiatives. The results of this assessment are valuable not only in the Mayesbrook Park restoration project but are also applicable to wider urban river and urban area restoration initiatives and will support future research in this field. It will also help in achieving ‘good ecological potential’ for the Seven Kings water body as part of the Water Framework Directive.

Restoration of the Mayes Brook – Executive summary – full text 

What is this initiative about? 

This project illustrates how an assessment on the services that nature provides for people helped in the regeneration of Mayesbrook Park.  The transformation allows the park to better serve the local community and also the city of London under a changing climate with increased flood risks.

The park is in the Borough of Barking and Dagenham, one of the twenty most deprived boroughs in the UK.  It was previously under-used and had few amenities, whilst the river was confined to a concrete channel and lay behind a metal fence, providing little value to wildlife or people.

How does it reflect the ecosystem approach? 

An assessment of the ecosystem services provided by the park both now and in the future identified its role in reducing flood risk, as well as its value for recreation and wildlife.  The assessment illustrated that £7 of benefits will be provided for every £1 invested in restoration of the park, which provided the basis for a funding partnership worth £1.6 million.

In valuing the ecosystem services, the project reflects the ecosystem approach, in that “Conservation of ecosystem structure and functioning, in order to maintain ecosystem services, should be a priority target of the ecosystem approach”.  The project also considers the long term effects of climate change and the associated risk of increased flooding and increased summer temperatures.  As such it reflects the ecosystem approach, which states “consider mitigating actions to cope with long-term changes such as climate change”.

Progress so far 

The first phase of the project includes re-routing the Mayes Brook along a more natural course, renewing the disused lakes and planting trees. The second phase includes the restoration of the two lakes, one for boating and one for angling, which will also improve habitat conditions for wildlife.  A visitor and facility centre will be built, along with a café and permanent exhibition on what the park is doing to adapt to climate change.

Challenges and lessons learned

The project highlights how an economic appraisal of the benefits that an area of land can provide for people, can bring about significant change.  The clear demonstration of the value of the project helped reassure and engage representatives of the local community.

It is also an example of partnership working, and of a scale of park regeneration that was only made possible by the combination of staff, funding and technical resources provided by the various partners involved.  It illustrates the potential for such a project to cause a resurgence of public interest in nature and access to the outdoors.  The involvement of the Environment Agency as a partner helped in the process of securing the numerous approvals needed (flood risk, contaminated land, soil disposal etc.).

http://ecosystemsknowledge.net/resources/examples/mayesbrook

 

River Restoration Case Study

“The rejuvenation of Ladywell Fields means the area is now an oasis of calm for people to socialise and relax in” – Boris Johnson, Mayor of London

ladywell1a

Ladywell Fields, looking north | by Andy Worthington

Ladywell Fields, London Borough of Lewisham, was a former featureless green space but following successful river restoration has become a riverside haven, for both local people and nature. The renewal of the park was specifically designed to make the space feel safer, and to focus on the park’s unique asset – the River Ravensbourne.  This case study is an output of QUERCUS – Quality Urban Environments for River Corridor Users and Stakeholders – a project financed through EU LIFE, the European Commission’s environmental fund. It was a partnership between the London Borough of Lewisham, Chester City Council in NW England and ‘s-Hertogenbosch in the Netherlands. Each city features a river corridor with similar problems but of varying size, environmental and social characteristics.

ladywell2The key features and changes:

The secondary river channel

This was created to enhance the visibility and accessibility of the river and provide a focus for the park.  As well as enhancing the landscape visually, the new river channel also provides huge benefits ecologically, flood storage capacity, an a place to play or paddle.

A new wildlife area

Formerly a fenced off and neglected ‘nature reserve’, the wildlife area is now part of the regenerated park, comprising coppiced woodland, meadow areas and deadwood habitats.  The old station ticket office has been re-opened as an environmental education centre, and a new path to the station has been created.

The design work was carried out by Landscape Architects BDP with construction costs of £1.8m.  The park, completed in 2011 was awarded a London Planning Award (Winner: Best New Public Space) 2013, Street Design Award (Winner: Urban Green Space Category) 2012 and a New London Award (Commendation) 2012.

ladywellissue1

ladywellissue2

ladywellissue3

In order to make Ladywell Fields a more popular open space, the northern part of the park was re-landscaped to focus on its previously hidden natural asset – the River Ravensbourne. The vision was to create a well used and well loved park, focused on the river, which would be seen by local people as an important resource within an urban inner city environment. Prior to the project the River Ravensbourne ran along the edge of Ladywell Fields in an artificially widened and toe-boarded channel. The restoration has created a new river channel, bringing around half of the Ravensbourne’s flow into the centre of the park in a more natural V-shaped, meandering channel, to be seen and enjoyed by all. The previously formless landscape, lacking character and interest has thus been transformed by the new river channel, its banks and the use of the resulting earth on site to create terraces, views and improve accessibility.

ladywell4

ladywell3

A new river channel featured new footbridges, a backwater with viewing platform, an ephemeral pool creating interest near the newly opened cafe, a copse of trees to provide shade and swathes of wildflower meadow providing splashes of colour in this vibrant, natural landscape. Innovative water play was also introduced using a series of boreholes to extract water out of the underground reserves. These are activated by a lever pump at ground level which splashes water into a dry rock ravine. An enhanced footpath network with new lighting, boardwalks and park furniture creates a safe environment and provides new links to surrounding areas connecting the local community to their parkland.