Adaptable and Resilient Shopping Centres Assessing Climate Vulnerability and Resilience

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1 Greg Johnson National Sustainability Manager Commercial Property Adaptable and Resilient Shopping Centres Assessing Climate Vulnerability and Resilience

2 Stockland s Strategic Response to Climate Change Monitor Reduce Adapt Tri-generation plant Castlereagh St Innovate Communicate Solar PV installation Stockland Green Hills

3 Moving from Strategy to Assessment

4 Vulnerability and Resilience Assessment Criteria Climate Effects predicted exposure to changing climate Property Elements sensitivity and adaptive capacity Climate Risks potential impact from climate effects

5 Climate Effects - Predicted Exposure Climate effects Summary of regional projections ( ) Credit Climate Zone Zone 2 Mean temperature change Extreme heat Mean rainfall change Extreme rainfall inland flooding Sea level rise coastal flooding Drought (see note below) 2030: Increase by 3% to 21.6 O C 2070: Increase by 17% to 26.1 O C Baseline: 16 days per annum > 35 C 2030: Increase by 150% to 40 days 2070: Increase by 300% to 64 days Baseline: 811 mm per annum 2030: Decrease by 14% to 698 mm per annum 2070: Decrease by 17% to 674 mm per annum Baseline: 17 days per annum >150 mm 2030: Increase by 29% to 22 days 2070: Increase by 47% to 25 days The 1-in-100-year storm tide event is projected to increase by 51 cm. 2030: Increase by 12% potential evaporation 2070: Increase by 22% potential evaporation Wind and hail See cyclone 3 Cyclones 10% increase in cyclone intensity and frequency, as well as a 130 km shift southwards in cyclone tracks. 3 Bushfires Increase in bushfire risk see map. 2 Relative humidity 7-17% increase 2 Overall Exposure Rating 2.4

6 Property Elements Sensitivity & Adaptive Capacity Location and design Structure Operation and Maintenance Utilities and Services Stakeholders Authorities Retailers, Community Contractors

7 Climate Risks Potential Impacts Increased demand on HVAC systems Reduced integrity of roofing structures Overloading of stormwater systems Deterioration of building materials Reduced availability of potable water Local flooding, salt water intrusion Wind and hail damage Water and mosquito borne disease Bushfires, smoke penetration Increased landscape maintenance Expectation of community as a place of refuge Business disruption to our customers & retailers

8 Vulnerability and Resilience Scorecard A score from 1 to 3 is assigned to each criteria in each category Scores are aggregated and averaged for a category average Category scores are added for an overall score out of 9.

9 Climate Change Vulnerability and Resilience Wendouree Point Cook Green Hills North Shore Cairns Wetherill Park Townsville T ville K Mart Rockhampton Hervey Bay Gladstone 2 Victoria Ave Durack Centre Bull Creek

10 What have we found? Stormwater channel causes carpark to flood 3-4 times a year Metal roof screwed down with cyclone washers Major hail event caused gutters to block and ceiling to collapse Shade cover over atrium due to glare and heat

11 What have we found? Location of major services near storm water pits Box gutter overflows and damages soffits

12 What have we found? Heat reflective cool roof materials used to reduce heat island effect. Additional rain heads installed to cope with extreme rain Exterior cladding cyclone rated

13 Cool roofs as an adaptive response Simulation appears to only explain 20-40% of the observed energy savings associated with cool roofs. Why is this? 1 st Order Simulation Assumes no micro climate above the roof, no heat island effect factored, heat instantly dispersed 2 nd Order Effects (Local Heat Island) Convective heat loss from roof heats ambient air locally and creates a roof micro climate. This in turn warms the roof surface further which in combination leads to: Additional roof heat loads Ventilation air intake temperatures are warmer Condensing temperatures are higher, cooling efficiency lower Reasonable approximation for small roofs with no mechanical equipment on the roof These effects become particularly important on larger roofs

14 What the modelling tools can t tell us about 2 nd order effects Hervey Bay Coolmax Savings 9.5% MWhe/pa +50 Savings multiplier of % Savings Over Zincalume Coolmax Surfmist 1 st First Order Savings Electricity Use (MWhe/pa) % 3.7% Total Savings (with 2 nd Order) Electricity Use (MWhe/pa) % 7.2% Savings Multiplier

15 What have we found? Hail damage to air cooled condenser coil Ductwork secured for cyclones Stormwater drains back up and flood mall 2-3 times a year Shade sails in carpark provide amenity for shoppers

16 What have we found? Examples of sprays fitted to air cooled PAC units to assist on days of extreme heat.

17 Key Adaptation Actions Area Proposed Actions Benefits Maintenance & Operations Asset Planning Design & Development Continue installing roof fastening systems in vulnerable regions Maintenance of roof stormwater drainage systems Protection of roof mounted HVAC equipment against wind and hail damage Model performance of existing HVAC systems to increase in extreme heat days Embed extreme event responses into emergency procedures and Stockland risk management processes Raise awareness with stakeholders on responses for extreme events Include dialogue with local authorities around the use of centres for refuge Provide facility for plug in emergency power supplies Provide shelter for carparks, outdoor dining areas, atriums, walkways Specify heat reflective and thermal cool roofing materials Design for increased extreme heat days over 35 degrees in developments Design for increased rain events above 150 mm in developments - Reduced operating and maintenance costs - Operational issues are addressed as climate adaptation responses - Actions can be prioritised, investigated and rolled into asset plans over time - Greater emergency preparedness and amenity where centres used for refuge - New shopping centres can be future proofed through climate resilient design - Potential insurance premium reductions - Reduced risk of business interruption for retailers and rental abatement - Improved indoor environment and comfort for retailers and shoppers - Added community value as a safe and secure place of refuge during extreme events

18 In Summary Climate resilience is not just about how we respond in an extreme weather emergency. It s as much about how we manage incremental changes to our climate over time. Our response is as much about how we manage the day to day, as well as the extremes. If we are experiencing noticeable climate impacts today, what will it be like in the future? Some of this impact we can avoid through adaptation, some of it we can only manage. What is important is to be understand vulnerability and take action to improve resilience.

19 Stockland Corporation Limited ACN Stockland Trust Management Limited ACN th Floor 133 Castlereagh Street SYDNEY NSW 2000 DISCLAIMER OF LIABILITY While every effort is made to provide accurate and complete information, Stockland does not warrant or represent that the information in this presentation is free from errors or omissions or is suitable for your intended use. The information provided in this presentation may not be suitable for your specific situation or needs and should not be relied upon by you in substitution of you obtaining independent advice. Subject to any terms implied by law and which cannot be excluded, Stockland accepts no responsibility for any loss, damage, cost or expense (whether direct or indirect) incurred by you as a result of any error, omission or misrepresentation in information in this presentation. All information in this presentation is subject to change without notice.