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Resilient Water Infrastructure
Claire Mortimer
Manaaki Whenua Landcare Research
CSC Research findings
Councils asked for;
• ‘More specific information on the effect of
stormwater run-off from impervious surfaces’
• ‘Whole-of-life costs and benefits for swales and
stormwater collection ponds’
Existing Research/tools
1. Body of research on impacts of stormwater run
off (Landcare Research, NIWA)
2. CostNZ; compares relative life-time costs of
various stormwater management devices
3. C-CALM; sub-catchment based stormwater
treatment planning model
Existing research cont.
• Low Impact Urban Design and
Development (LIUDD)
– Working with natural systems and
minimizing environmental impacts
– Integral to broader urban planning
• Social, institutional barriers and
enablers to technology adoption
Emerging LIUDD Research
1. Life Cycle Assessment:
What are the lifetime costs of green roofs, walls &
street trees?
2. Multiple Ecosystem Service Benefits
What are the full suite of benefits (e.g., water
supply, public health, biodiversity, amenity values)
delivered under various LIUDD options?
3. Optimisation
What are the best device designs to achieve
different benefits & outcomes?
4. Scaling up
Cost benefits when we scale up?
5. Monitoring
To what extent is LIUDD cumulatively being taken
up in NZ settlements
Hard & soft research needed for new technologies
Quantifying impacts of
Quantifying benefits of
Optimizing design for
different benefits
Assessing relative life cycle costs of
new v conventional technology
Alignment to plans, regulations
Community acceptance; social
practices, identity
Common construction mistakes
Who maintains decentralized
Capacity building of planners,
engineers, construction companies
LIUDD adoption
Research principles for infrastructure
• Integrate physical and social science – design
performance and uptake
• Research and Council staff working in teams
• Resilience/adaptability as a design principle for 21st
Century infrastructure
• Frame infrastructure within broader dynamic urban
system and pursue multiple benefits
Links to research
LIUDD some NZ research and tools
Website of 6 year LIUDD research programme
Website of LIUDD NZ case studies; their design, policy and implementation
CostNZ web based costing tool for comparing LIUDD stormwater devices with conventional options
C-CALM Sub catchment integrated stormwater treatment planning model. contact
How to put nature into our neighborhoods. Urban greening Manual using LIUDD to improve biodiversity outcomes;
Landcare Research Science Series No. 35
Low Impact Urban Design and Development: the big picture; An introduction to the LIUDD principles and methods
framework Marjorie van Roon and Henri van Roon. Landcare Research Science Series No. 37
Google link to papers on LIUDD policy and governance and barriers to adoption
Climate change social science
The CSC report findings indicated councils were looking for ways to communicate science to their communities, the following
report provides a New Zealand take on the current state of social and community social knowledge around climate change.
‘Degrees of Possibility: Igniting Social Knowledge around Climate Change’,