What can we learn from the River Axe an award winning project
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Sun Yan Evans – Mott MacDonald Andy Emblin – Environment Agency What can we learn from the River Axe – an award winning project
Transcript of What can we learn from the River Axe an award winning project
Sun Yan Evans – Mott MacDonald
Andy Emblin – Environment Agency
What can we learn from the River Axe
– an award winning project
Outline
1. Introduction
2. River Axe catchment
3. History of flooding
4. Project set up & funding
5. Project governance
6. Tiered approach & efficiency
7. Key ingredients for success
Introduction
178km296km2
River Axe catchmentR. Yarty
R. Axe
Key features
R. Yarty
R. Axe
Axminster
History of flooding – Chard Junction
31/12/2000 19/12/1992
07/07/201229/11/1965
History of flooding – Broom13/10/1993 13/10/1993
30/11/20127/12/2000
Key recent event: 7th July 2012 storm
7th July 2012 event
Chard Junction
Broom
Whitford
Weycroft
Axminster
All three parties affected
Damages from 7th July 2012 event
EA
Network
Rail
DCC
Response from organisations affected
• EA
– A more evidence-based understanding of present day flood risk
• Network Rail
– To enable better management of future flood risk, develop asset resilience
• Devon County Council
– To assist future planning of flood risk management
Project set up & funding
Common interests:
to improve understanding of flood risk, to tackle challenges
and issues for greater & wider benefits
Project set up Partnership
funding
Collaborative
working
Project governance
Advisory Group
(Legal, procurement) Project Board
Stakeholder
Working Group
(Chair: EA PM)Project Team
Senior Users Senior
Supplier
Project
Director
Product
Owners
Joint development of project scope
We understand each other’s
needs & requirements,
impacts and benefits
Tiered approach to bring further efficiency
2013 Channel Survey
Extent of 2D domain
1m LiDAR
Elevation (mAOD)250m
10m
SAR
Elevation (mAOD)170m
0m
0 1.5 30.75 Kilometers
Ü
Flood risk assessment - approach
• 2D model
• Multiple events
• Multiple scenarios
• Flood progression
• Depth, velocity, hazard
• Wider use
– WFD
– Option testing
Asset Vulnerability: Key sections at risk of flooding
RailwayChard Junction
Broom Crossing
Weycroft
Shand Park
Millbrook Stream
Whitford
Road
Whitford Road
B3261 Bow Bridge
White Bridge
Axe Farm
Station Road,
Chard Junction
Broom Lane
Weycroft Bridge
Volumes > 25,000m3 stored behind railway
Key achievements for Tier 1
• Better Understanding of:
– Flood Risk
– Critical risk locations
– Magnitude of vulnerability
– Present day hazard
• Built the evidence for further actions
• Develop a model for wider use in the future
What happened after Tiers 1, 2 & 3?
• Develop scoping plan for next
phase
• Option development & testing
• Narrow down options
• Consultations
• Preferred options selected
• Schemes under implementation
EA Project Excellence Award 2016
Summary - key ingredients for success
Partnership
Leadership
Vision
Knowledge
Commitment
