26th Standing Conference on Stormwater Control, Dunfermline
September 2004
Working Together - Implementing the DEX Drainage Master Plan
Craig W Berry, W A Fairhurst & Partners
Neil Campbell, Sir Frederick Snow & Partners
Hugh Ross, Ironside Farrar
Rab Hutton, Fife Council
Aim of this Presentation• Raise awareness of SuDS
• Describe the implementation process used at DEX
• Highlight key achievements.
• Present experience and lessons from other projects since DEX.
The SUDS Philosophy“Drainage techniques for urban development which do not
adversely affect the aquatic environment”
QUANTITY QUALITY
SUDS
AMENITY AND
WILDLIFE
Water Quality - River Pollutant Sources (UK)
Others6%
Wastewater34%
Urban Drainage
38%Industrial Waste10%
Agriculture12%
Surface Water Management Train
Prevention
Source Control
Site Controls
Regional Controls
Watercourse
Soakaway / InfiltrationSwalesFilter drains / Filter stripsPorous/permeable surfaceWater buttsBio-retention areas
Soakaway / InfiltrationSwalesFilter drains / Filter stripsPorous/permeable surfaceWater buttsBio-retention areas
Good Housekeeping, Management and Re-use
Good Housekeeping, Management and Re-use
Storage/attenuationDetention BasinsExtended DetentionInfiltration Basins
Storage/attenuationDetention BasinsExtended DetentionInfiltration Basins
Technique
End-of Pipe TreatmentRetention PondsWetlandsReedbeds
End-of Pipe TreatmentRetention PondsWetlandsReedbeds
Treatment Level
Source Control
Site Control
Regional Control
SuDS/River Linkage
River Restoration
‘Sustainable Urban Drainage is more than just a set of design
tools.
- It requires a change in design philosophy and attitude’
Why SuDS at DEX?• Local flooding and water quality issues
• Demand for residential and industrial growth.
• Conventional Drainage Solutions unsustainable and uneconomic
• Opportunities for cost effective design, and environmental gains
• SEPA and Planning initiatives
• Developers commitment to innovative solutions
Dunfermline Eastern Expansion (DEX)
• 900 acres Residential and Commercial Development,
• Features - Ponds, wetlands, swales, filter drains, detention basins, source control.
Working Together - The ‘DEX Team’
SEPASEPA
Scottish Water
Scottish Water
Local Community
Local Community
Fife CouncilEnvironmental,
Roads
Fife CouncilEnvironmental,
Roads
ContractorsContractors
Fairhurst(Civils Designer, SuDS, Ecology,
Hydrology)
Fairhurst(Civils Designer, SuDS, Ecology,
Hydrology)
Landscape Architect
Landscape Architect
Meedhurst Project
Managers
Meedhurst Project
Managers
Wilcon HomesWilcon Homes
Fife CouncilPlanners
Fife CouncilPlanners
Frederick Snow
Advisors
Frederick Snow
Advisors
Ironside FarrarIronside Farrar
Scottish EnterpriseScottish
Enterprise
The DEX Process
Key Elements• Design criteria review process• Establishing a collaborative environment• Identifying and acknowledging gaps in
knowledge• Challenging ‘untried’ innovative solutions• Learning from experience elsewhere (USA,
Sweden)• Developers commitment• Workshops
Strategic Surface Water Drainage Plan
DEX SuDS Strategy
• Limit discharge rates from development areas (2 year post development run-off)
• Promoting source control• Provide regional biological treatment
(ponds/wetlands)• Promote habitat enhancement and local
amenity value
Dunfermline Expansion Area
Retention Pond
Swales
Outlet
Basin
Duloch Park, Dunfermline
Duloch Park, Dunfermline
Retention Pond
Duloch Park, Dunfermline
Pond Cascades
Tesco Store - Permeable surfaces
Pond
Swales and filter drains
Extended Detention Basin
Wetlands
Retention Pond and River Restoration
Achievements• Establishment of criteria for sizing treatment
facilities• Unconventional drainage systems accepted.• Adoption & maintenance framework established.• Design standards established. • Environmental enhancement. • Public acceptance.• Monitoring & education programmes implemented.
Key to Success• Strategic View.
• Early Liaison and Stakeholder Workshops.
• Commitment and vision
• Collaborative Approach
• Measurable cost and environmental benefits.
Problems & Barriers
• Lack of integration between landscape strategy and SuDS features
• Maintenance issues• Preconceptions of SuDS - (just soakaways!)• SuDS are expensive• Public acceptance and safety concerns• Inappropriate and Inconsistent application
Key Initiatives and Drivers
• Scottish Planning Policy 7: Planning and Flooding (SPP7)
• SEPA Policy 15 & 41: SuDS & Flooding
• PAN 61: SuDS
• Water Framework Directive - Future Impacts?
• Water Environment and Water Services Act 2003
• Controlled Activities Regulations 2005?
Guidance Documents
Development of Design Guidance
• Maintenance Framework Agreement• Research e.g. CIRIA, Abertay • New UK Design Guidance 2005?• Impact of Scottish Water ‘SuDS for
Scotland’?
Other SuDS Features - Residential Swales
Roadside Swales
Permeable Surfaces and Below Ground Storage
Bioretention - ‘Rain Gardens ’
Benchmark Projects
• Notable major strategic projects:South East WedgeDunfermline Eastern ExpansionHeartlands Development,
PolkemmetDundee Western GatewayCraigmillar Urban Regeneration
Craigmillar and the South East Wedge
• Surface Water Management Plan • Holistic Approach• Focus on Environmental
Enhancement and Social Integration
• Promoting Sustainable Development
Craigmillar RegenerationNid
drie
Burn
Braid B
urn
Braid B
urn
Nid
drie
Bur
n
‘Green Corridors’
Sustainable Urban Drainage - Five points to success
• Holistic and integrated approach
• Minimise contamination and flooding
• Add value to the community
• Stakeholder awareness and involvement
• Early consideration to SuDS
“The kind of thinking that has got us into this situation is not the kind that will get us out of it.” - Albert Einstein
the Alternative Approach