segra, geelong, 20112015.segra.com.au/segra11confproc/presentations/tuesday/spotligh… · segra,...
TRANSCRIPT
Planning more resilient urban water systems
Tony Overman, Strategy and Sustainability Coordinator
25 October 2011
SEGRA, Geelong, 2011
Key messages
• Drought, growth expose system challenges
• Policy shift to IWCM
• Difficult via conventional planning
• Develop more resilient systems, all scales
• Cohesion, adaptability, diversity, efficiency
• Geelong transitioning to ‘water resilient city’
Geelong water system challenges
Pressures
• Drought
• Rapid growth
Implications
• Water security threat
• Uncertainty
Response
• Restrictions
• Augmentations
• Alternatives
Living Victoria policy
• Landscapes for healthy people
• Safe, fit for purpose water
• Flood protection Liveability
• Resilient urban landscapes
• Smaller environmental footprint
• Healthy waterways and bays Sustainability
• Water security
• Affordable water services
• Contestable investment Productivity
Diversify, Empower, Integrate
Integration across scales
• 3 water sub systems
– City, Precinct, Property
• Traditional water planning
– Tactical level
– Service need (functional) focus
– Competitive, least cost
– Favours city scale solutions
• Step back to strategic level
• Enhance ‘resilience’
– System focused
– Complementary, best ‘suite’
– Encourages fit for purpose ‘steps’
City centralised networks
Precinct developments,
localised schemes
Property residences businesses
Resilient systems
• Resilient systems1 :
– absorb
disturbance
– recover from
shocks
– re-organise
– yet retain function,
structure
Cohesion
‘Existence of unifying forces or linkages’
Adaptability
‘Flexibility to change in response to new
pressures’
Efficiency
‘Performance with modest resource
consumption’
Diversity
‘Existence of multiple forms and behaviors'
Resilient System
1 Fiskel, J (2003) Designing resilient, sustainable systems, Environ. Sci. Technol. 2003, 37
Framework for resilient urban water systems
Desired system characteristics
Urban Water System Vision
Urban community outcomes/aspirations
Liveability, Productivity, Sustainability
Resilient
Urban Water System
Cohesion
Consumer ‘water
sensitivity’
WSUD
Secure Potable Network
Adaptability
Water Sensitive Gardens
Aquifer Storage & Recovery
Barwon Downs Drought Supply
Diversity
Tanks Grey-water
Stormwater Reuse
Sewer Mine
MGP Anglesea BF
Efficiency
Efficient Fixtures
Sport Turf Irrigation Upgrades
Potable Supply
Optimisation
Property
Precinct
City
Efficiency
Diversification – city scale
Geelong Alternative Water Supply Atlas
Integrated water cycle management
• A liveable, sustainable,
productive Geelong
• Water ‘Resilient’
– Cohesive
– Adaptable
– Diverse
– Efficient
• Best fit suites of solutions,
multi scale
• ‘System’ urban planning
• Partnerships