Case study:Pumlumon Peatland Restoration for Floodwater Management

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Location: 52° 26' 29.85" N, 3° 46' 13.39" W
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Project overview

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Status In progress
Project web site http://www.therrc.co.uk/sites/default/files/projects/37_pumlumon.pdf
Themes Flood risk management, Habitat and biodiversity, Water quality
Country Wales
Main contact forename Liz
Main contact surname Montgomeryshire Wildlife Trust
Main contact user ID
Contact organisation Montgomeryshire Wildlife Trust
Contact organisation web site http://www.montwt.co.uk/
Partner organisations Defra, Natural Resources Wales, Powys County Council, Ceredigion County Council, Communities First Mahynlleth, Ecodyfi and Pentir Pumlumon, Dyfi Biosphere, Cambrian Mountains Initiative, Leeds University, Bangor University, RSPB, Centre for Ecology & Hydrology, Welsh Government
Parent multi-site project
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encompassing the following
projects
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Project summary

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The Montgomeryshire Wildlife Trust has been running the Pumlumon Living Landscape Project (Photo 1 and Map 1) since 2005, during which time it has developed and demonstrated the benefits of an ecosystem approach to landscape, people, the economy and wildlife. Rewetting upland peat bogs, through the blocking of drainage ditches, improves their condition and water retention capability, creates new areas for wildlife, and helps reduce climate affecting emissions. The Pumlumon project recognises that the future for upland farming is threatened; however, there is also awareness that the uplands of Wales offer vital economic opportunities both in terms of carbon and floodwater. • The Pumlumon Living Landscape Project has identified a number of ditch blocking methods to support floodwater management works across of range of sites. • The capital works cost to carry out effective flood water management techniques on degraded bog is minimal. However, it represents a potentially valuable economic opportunity for upland landowners. • The data collected to date have been analysed by CEH Wallingford. The hydrological restoration carried out on Glaslyn has raised the water table by 5cm.

Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment



Site

Name Severn, Rheidol, Dyfi and Leri
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Desired post project morphology
Heavily modified water body No
National/international site designation
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Protected species present No
Invasive species present No
Species of interest
Dominant hydrology
Dominant substrate
River corridor land use
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Project background

Reach length directly affected (m)
Project started 2000
Works started
Works completed
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Total cost category
Total cost (k€) £1.9m"£" is not declared as a valid unit of measurement for this property.
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Cost for project phases

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Investigation and design
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Reasons for river restoration

Mitigation of a pressure Flood risk management
Hydromorphology
Biology
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Measures

Structural measures
Bank/bed modifications
Floodplain / River corridor
Planform / Channel pattern
Other Moorland restoration, Surface drainage systems improved
Non-structural measures
Management interventions
Social measures (incl. engagement)
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Monitoring

Hydromorphological quality elements

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Any other monitoring, e.g. social, economic

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Monitoring documents



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Supplementary Information

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