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City of Unley Heat Island Modelling & Opportunities
What is the WSC Toolkit?A numerical tool that support the strategic planning and conceptual design of stormwater management by:
Quantifying the multiple benefits, including
Stormwater treatment & harvesting
Urban stream health
Local microclimate
Understanding future rainfall variability and its applications for urban water management
Evaluating the overall performance of potential green infrastructure scenarios
© CRC for Water Sensitive Cities
Overall concept
© CRC for Water Sensitive Cities
Climate change (present & future), etc.
Hydrology & Ecology Urban Microclimate
Treatment and Harvesting
Performance
Stream Hydrology and Water Quality
Stream Erosion and Minor Flooding
Microclimate –Extreme Heat
Microclimate –Average summer
temperature
Drivers
Responses (modules in WSC Toolkit)
Economics
Life
cyc
le c
ost
Will
ingn
ess t
o pa
y
Under development
Water Restrictions Stream Health Amenity Microclimate Flooding
Feed key performance indicators (KPIs)
Aspects of a Water Sensitive City
Consolidation
Evaluation
Communication outcomes…
Overall concept
© CRC for Water Sensitive Cities
Communication outcomes…
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Scenario A Scenario B Scenario C
Wei
ghte
d pe
rfor
man
ce
biophysical performanceLife cycle costwillingness to pay
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Present Future 1 Future 2
Scen
ario
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biophysical performanceLife cycle cost
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Scenario A Scenario B Scenario C
Stre
am h
ealth
biophysical performanceLife cycle cost
Willingness to pay
Specific aspect of different scenarios 0
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Scen
ario
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biophysical performance
Life cycle cost
“…allows well-informed collaborative
decision-making by providing
assessment of various aspects of
different options…”
Case Study: City of UnleyQuantifying the urban microclimate benefits associated with green infrastructure interventions
• Area ~14 km2
• Predominantly residential
2 3
41
1. showgrounds
2. Residential 3. Residential (dense tree)
4.Commercial (Unley rd)
⁰C
Land Surface Temperature map (using Toolkit)Land cover map (using GIS)
Leader Street WSUD upgrade to an active living streetCommercial
Residential
1.2 km street
How do these WSUD interventions improve the microclimate ?
Land surface temperature (LST) reductions
• Immediately after upgrade: 40% (0.8 ha) of the site will experience LST reductions of up to 3 ⁰C
• After tree establishment: 35% area will have 0- 3 ⁰C LST reduction; 15% area will have 3-6 ⁰C
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Area
/ha
Land Surface temperature reduction (°C)
a) after street upgrade (no established trees)
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/ha
Land Surface Temperature reduction (°C)
b) following establishment of tree canopy
• Up to 6 ⁰C LST reduction (mainly in the inter-sections) can provide considerable cooling benefit to people utilising this street.
Opportunities to extend this work• Refinement of Current Case Study:
– New microclimate module – comparative case study– Comparison with City of Unley’s independent assessment– Detailed CRC Report and Publication on collaboration
• Exploration of other case studies:– Green Hills Project– Adelaide Airport
© CRC for Water Sensitive Cities
2012 - 2021
© CRC for Water Sensitive Cities