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Enhancing Stopbank Resilience in New Zealand - Coggle Diagram
Enhancing Stopbank Resilience in New Zealand
Stopbanks Overview
Purpose
Absorb water pressure
Prevent erosion
Hold back floodwaters
Evolved Roles
Enhance biodiversity
Urban green spaces
Support walking/cycling paths
Preserve cultural heritage
Key Statistics
Network
5,000+ km of stopbanks
Hundreds of ancillary structures
Value of Protected Assets
$200+ billion worth
Investment
$5 billion required (10 years)
$200 million allocated (2024)
Challenges
Inconsistencies
No standardised regulatory framework
Regional variation in assessment and design methods
Regulation Exclusions
Not covered by Building Act or Dam Safety Regulations
Regional management with limited central oversight
Opportunities for Improvement
Standardisation Benefits
Improved efficiency in construction and maintenance
Equal community protection
Clear risk, climate change, and environmental guidelines
Examples of Success
Rangitaiki River stopbanks: Influenced Bay of Plenty Guidelines (2021)
Avon River Corridor: Christchurch floodplain management projects
Proposed Solutions
National Best Practices
Develop clear guidelines for design and construction
Elevating Status
Match stopbanks with critical infrastructure (roads, bridges, etc.)