habitat creation on the severn estuary lyn jenkins flood and coastal risk management south west...
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Habitat Creation on the Severn Estuary
Lyn JenkinsFlood and Coastal Risk Management
South west Region Habitat Creation Programme
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Making Space for Water
Storms and seal level rise = unsustainable sea defences
Cannot defend everywhere Focus on properties
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DEFRA targets for operating authorities:
No net loss of biodiversity
Habitat loss and gain balance sheet
Create 800 ha of new habitat over 2008 - 2011 300 ha of saltmarsh and mudflats
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Legal obligations: Habitats Regulations
Apply to all Natura 2000 sites:
SPAs for birds, SACs for habitats
Regulation 61:Appropriate Assessment of plans and projects
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Habitat Regulations Assessment Required for SMP, FCRM strategy and individual schemes
• Agreed with NE and CCW
• Signed off by Sec of State
and WAG
• Formal process
• IROPI
• Compensatory habitat
Circular 06/05 on biological and geological conservation
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Legal duties - Compensatory habitats Maintain extent and integrity of international sites Mitigate effects where possible Compensate for direct impacts of flood defence work
and for coastal squeeze (sea level rise)
Direct effects 10’s hectares, indirect effects of coastal squeeze - 1000’s hectares
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Severn estuary: FCRM strategy 140+ kms of flood defences Coastal squeeze on SPA, SAC and RAMSAR Legally required to safeguard European sites Compensate for coastal
squeeze losses
Identify managed
Realignment sites
through FCRM strategy.
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Severn estuary: habitat lossSea level rise – 2600 ha loss over the next 100
years
2026 – 700ha lost 2056 – 1300ha 2106 –2600ha
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Severn estuary: habitat loss
¾ mudflat and sandflat (10% of resource)
¼ saltmarsh (40% of resource)
Saltmarsh is priority for habitat creation
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Displacing freshwater habitats
Bird interest not just confined to designated site
Dependent on supporting habitats: Freshwater grazing marsh behind sea defences High tide roosts
Maintain ecological
integrity of site
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FCRM strategy: possible realignments
Identifies potential sites Unsustainable defences Topography Minimal impact on property and infrastructure Ecological suitability
Approximately 40 potential sites identified so far
but few large sites.
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Role of the RHCP Habitat Creation programme in each EA region Work with Wales and Midlands to identify viable
sites Work out how they can be delivered
Current target is to create 650 ha 2010 -2030
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Managed realignment or no active intervention?
Unpopular policies – protect at all costs Landowners unwilling to accept land loss Do we walk away or manage the process? Realising opportunities through purchase High Level Stewardship Link to sites to gain multiple benefits – access
recreation, landscape …..
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Managed realignment: Incentives Agri environment schemes up to £700 /Ha for 20
years Can buy land/property for compensatory habitats Move freshwater marshes inland to build
resilience
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Steart Peninsula Bridgwater Bay, Somerset
Protected by a shingle ridge Less than 1 in 10 year
standard Could create up to 500 ha of
new habitat Adjoins Severn estuary SAC
and SPA Strategically important
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New approaches: regulated tidal exchange
Allows controlled tidal inundation through a sluice gate
R. Exe at Goose moor Option at Steart Axe estuary wetlands
at Seaton
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Delivering habitat creation
Not just the Environment Agency – all operating authorities
Risk if we cannot find sufficient compensatory habitat then flood defence schemes will be delayed
Strategic approach Partnership with Local authorities Links to Local Development frameworks Land allocations
PPS 25 supplement March 2010
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Habitat creation in practice
Working with partners
Local authorities have a key role: Identifying opportunities Developing/promoting projects Land allocations in LDF’s Granting planning permissions Planning your own flood defence works Key messages
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Living with a changing coast
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A vision for the future: Steart
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Making space for Water
Not just birds v people Allowing the coastline to move Building natural sea defences – saltmarshes Increasing resilience Habitat creation and wildlife benefits
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Adapting to climate change