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Land use planning for tsunami –
what are the options?
Wendy Saunders, MNZPI
GNS Science
Massey University
Joint Centre for Disaster Research
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GNS Science
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GNS Science
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GNS Science
Are we at risk from tsunami?
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GNS Science
Do we need to plan for tsunami?
• Health and safety – RMA s2
“promote the sustainable management of
natural and physical resources.
Sustainable management means managing
the use, development, and protection of
natural and physical resources in a way, or
at a rate, which enables people and
communities to provide for their social,
economic, and cultural wellbeing and for
their health and safety”
• Proposed NZCPS specifically
excludes tsunami, but still required
under RMA s30 & 31
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GNS Science
What about uncertainty?
• Who takes on the risk?
• What is acceptable?
• What AEP/return
period?
• Debate needed
• Precautionary
approach
• Incorporate into design
• Need to ensure
communities and
visitors are aware of
the risks
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GNS Science
How can we include tsunami risk in planning?
• Need to know what the risk is
• Map risk
• Include as a coastal hazard
• Incorporate into coastal hazard zones
• Cannot depend on response alone
• Formulate policy with a mix of readiness (EM) and reduction (planning)
• Ensure dune systems are retained
• Urban design
• Discuss options with your EMO
• Is a guidance note required?
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GNS Science
1947 tsunami impacts, Wainui Source: Tairawhiti Museum, Gisborne
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GNS Science
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GNS Science
Gisborne case study
• High risk – 10m+ tsunami
recorded
• No official warnings
possible for local event
• Theoretical development
scenarios for coastal land
• Urban design – evacuation
and construction
• Modelling
• In progress …
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GNS Science
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GNS Science
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GNS Science
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GNS Science
Watch this space …
• Worked example of how tsunami can be incorporated into planning
– How modelling can influence planning
• Economic impacts / comparisons
• Planning implications
– Tsunami recognised as a hazard
– Options for inclusion
– Emergency management
• Urban design that includes tsunami
– Seabrook, Tora
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GNS Science
Where to go for information
• MCDEM National
Tsunami Review
• Designing for
Tsunamis
• Quality Planning
Natural Hazard
Guidance Note
• GNS Science