An upland site of moorland and woodland is being used as a pilot study site to test pioneering solutions to combat flooding.

More than 25 different flood prevention measures are being piloted, as well as new findings being gathered at the Woodland Trust-owned Smithills site, near Bolton.

In light of predicted changes in extreme weather patterns due to climate change, the research is bringing in experts from Liverpool University and is being carried out in partnership between the Woodland Trust, Mersey Forest and the Environment Agency as part of the *Natural Course project.

The aim is to see the effectiveness of flood prevention measures on upland areas which are near big populations - and the research could influence flooding decisions UK wide.

The Smithills site is the ideal place to test such measures as it rises above the town of Bolton, where homes could become at risk during a large, rare flood event.

Tracey Garrett from the Woodland Trust said:

“Smithills is a mixture of moorland, grassland and woodland. The site rises up to 456m above sea level and borders a big urban area. The research is all about discovering the effectiveness of flood prevention measures upland and how these can help alleviate the possibility of flooding in the lowlands.”

The scheme is the brainchild of Michael Norbury at Mersey Forest and David Brown at the Environment Agency and funding came as a result of a successful bid from DEFRA. The Mersey Forest formed a partnership with Liverpool University which has been involved in the research.  The team began gathering data in January 2019 and will continue until at least March 2021.

At the site, measures such as leaky dams (living log jams) were placed in strategic locations in the uplands. These are stepped living log sections created to slow flow and soak up water and data began to be gathered on water flow changes. Other measures include wetlands and scrapes (shallow excavations to let water hold into the landscape) and dams made of peat or seedless rush bales (from nearby farms as part of their farm management).  It’s early days but so far the measures are producing positive results by reducing levels of excess water.

An unexpected but very positive outcome of the measures has been on the wildlife and high water levels, according to recent survey evidence. The new environments created have attracted the likes of the keeled skimmer dragonfly to the area – believed to be the first ever sighting in Greater Manchester of this elusive insect. The Woodland Trust and Mersey Forest hope similar discoveries will be made in the future.

Mike said:

“It is also about making the site more robust and able to cope with heavy rains or droughts, which are expected due to climate change. By wetting more extensive areas of land, patches of the landscape may be more resilient to fire and also slow the flow during downpours.”

The Woodland Trust bought the Smithills site in 2015 with the aim of restoring the moorland and planting more trees – it has planted 140,000 so far, as well as creating an integrated landscape plan. At 684 hectares, it is its largest site in England.

In 2018, it battled through one of its biggest challenges when fires swept through the site and damaged over a third of it. Since then, the Trust has been looking to see how the site can better cope with extreme incidents, including fires and flooding.

Notes to editors

For more about this release contact Andy Bond in the Woodland Trust press office on 0342 770 5795 or 07725 480434.

The Woodland Trust is the largest woodland conservation charity in the UK. It has over 500,000 supporters. It wants to see a UK rich in native woods and trees for people and wildlife.

The Trust has three key aims:  

  1. protect ancient woodland which is rare, unique and irreplaceable
  2. restoration of damaged ancient woodland, bringing precious pieces of our natural history back to life
  3. plant native trees and woods with the aim of creating resilient landscapes for people and wildlife.

Established in 1972, the Woodland Trust now has over 1,200 sites in its care covering approximately 29,000 hectares. Access to its woods is free so everyone can benefit from woods and trees.

*NATURAL COURSE is a collaborative project by Environment Agency, United Utilities, The Rivers Trust, Greater Manchester Combined Authority (GMCA) and Natural England who are working together to build capacity to protect and improve water quality across the North West. Natural Course is an EU funded LIFE Integrated Project. The project will use the diverse landscape of North West England to test and explore best practice in urban and rural environments, sharing results with UK and Europe. For more information visit www.naturalcourse.co.uk or contact Sarah Bazley at sarah.bazley@environment-agency.gov.uk or 07827 283228.