sandscaping in bacton, north norfolk - flood and coast...sandscaping in bacton, north norfolk...

Sandscaping in Bacton, North Norfolk

Protecting critical infrastructure and

benefitting communities

Flood & Coast29 March 2017

Jaap Flikweert CEng FCIWEM C.WEM

Jaap.flikweert@rhdhv.com @JaapJFlikweert

Flood & Coast 2017- Sandscaping in Bacton

@zandmotor

NL zandmotor with some background and pictures

Conclusion: inspiration, not copy - paste

Photos Joop van Houdt, Rijkswaterstaat

Zandmotor:Built in 2011

Size: 21.5m m3

Cost: £60m

Design life: 20 years

Photo Joop van Houdt, Rijkswaterstaat

Flood & Coast 2017- Sandscaping in Bacton

Inspirational…

Large scale & innovative nature

Multi-functional & multi-funding solution

Adaptive

Transformational

…But could it work in the UK?

More complex coastlines

Different governance & funding

NL to UK

Flood & Coast 2017- Sandscaping in Bacton

Application in the UK: Sandscaping

National: profiling & enabling

High-potential Sites

Work with local parties

on local cases

Flood & Coast 2017- Sandscaping in Bacton

So what is Sandscaping?

Soft coastal management

Design to make use of natural processes

Large scale

Multi-functional = Multi-fundable

Can work if:

Coastal processes are suitable

Locally owned & wanted

Competitive business case

Flood & Coast 2017- Sandscaping in Bacton

Bacton to Walcott

Norfolk Coast

Eroding coast

SMP

Gas Terminal

~1/3 of UK’s Gas Supply

Four private operators

Villages

Residential community

Caravan parks

Very aware of coastal risk

Reproduced from Ordnance Survey Maps with the permission of the Controller

of HM Stationary Office. Crown copyright reserved Licence AL.100026380

Bacton Gas

Terminal

Mundesley

Bacton Village

Walcott

Contains OS data © Crown copyright and database right 2017

Picture: Mike Page

Flood & Coast 2017- Sandscaping in Bacton

Story of the project

Two starting points:

Sandscaping pre-feasibility study

for NNDC

Cliff erosion in December 2013 storm

Study for Terminal Companies: Sandy solution preferred

and possible

Exploring a combined approach: from mitigating impacts

to generating benefits

Delay failure of coastal defences

→ Buy time for adaptation

Improve community viability – but in context of change

Flood & Coast 2017- Sandscaping in Bacton

Making it happen

Partnership Bacton Terminal Companies

North Norfolk District Council

Support from the Environment Agency & Input from The Crown Estate

Funding Terminal companies pay for their own protection

Good case for FCERM Grant in Aid: Additional B> Additional C

NNDC, Local Levy, EA WwNP funding

Potentially LEP, H2020 and others

Project-specific dredging area?

Flood & Coast 2017- Sandscaping in Bacton

Design process

Iterative finetuning

Modelling

Various tools: 2D Area, 1D longshore, 1D cross-shore, 2D horizontal

Expertise (incl. HR Wallingford, Deltares / NL Zandmotor, local

knowledge)

Contractor engagement

Informal ECI with all relevant contractors

Optimise design & develop relationships

Environmental Impact Assessment

Constraints, but also opportunities

Flood & Coast 2017- Sandscaping in Bacton

What will it look like?

1.5-2.5 million m3 of sediment

Terminal:

Very high protection level

Renourishment interval ~20 years

Villages:

Higher beaches & Slower erosion →

Time for adaptation

Dry beach & a special place

Flood & Coast 2017- Sandscaping in Bacton

Next steps

Design & Consents

Securing funding

Procurement → Construction expected in 2018

Monitoring and research:

For functional performance and impacts

For knowledge development

Flood & Coast 2017- Sandscaping in Bacton

Conclusions

Sandscaping: translating NL Zandmotor to UK context

Expecting to implement in Bacton in 2018

Template for making it happen elsewhere:

partnership, design approach

Maximise value of this first UK implementation

Sandscaping in Bacton, North Norfolk

Protecting critical infrastructure and

benefitting communities

Flood & Coast29 March 2017

Jaap Flikweert CEng FCIWEM C.WEM

Jaap.flikweert@rhdhv.com @JaapJFlikweert