mc millan_orsini_workshop_what is so scary about planning for bushfire
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Beyond the Edge: Australia's First National Peri-Urban Conference La Trobe University Oct 2013TRANSCRIPT
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What’s so scary
about planning for
bushfire?
Workshop
October 2013
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Who are we to talk about bushfire?
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What is the point?
• Strategically and economically it makes sense
• Victorian Bushfires Royal Commission
• State Planning Policy Framework
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What is the point?
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Bushfire behaviour 101
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Factors affecting bushfire behaviour
• Vegetation (type and structure)
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Factors affecting bushfire behaviour
• Topography (steep v flat)
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Other factors to consider
• Strategic access
• Urban form that would modify the underlying vegetation (and changes bushfire behaviour)
• Look at decision guidelines at Clause 52.47-3 of the VPPs
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Semi Managed
Fuel
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Scary and unfamiliar terminology
Forms of bushfire attack • Ember attack
• Radiant heat
• Direct flame contact
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Can you make some judgements?
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So why do you think it is scary?
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• The maps don’t give the answer
• It is not like a flood or native vegetation
• Comparing unlike things
• Subjective judgements about risk acceptance
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Overcoming our fears?
• Accept the risk exists
• Present information about the bushfire hazard to decision makers
• Form a judgment on acceptable risk – what is the residual risk?
Acceptable Not Acceptable
Risk Assessment
PANEL
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Practical tools…
• In most peri-urban areas we will be considering development in areas of:
• lesser risk (direct development)
• some risk (carefully consider and make a risk judgement)
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Establish context
• Collate information regarding the site and surrounds:
• Locality and site description (aerials and plans)
• Bushfire hazard information • Bushfire Management Overlay, Bushfire Prone Area mapping
• Other Overlays – e.g. Environmental Significance Overlay
• Victorian Fire Risk Register rating
• Regional Bushfire Planning Assessment
• Fire history
• Any other relevant information
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Information
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Establish context (Cont.)
• Strategic justification • Why has the location been selected?
• What other lesser risk locations were considered? If none, why?
• Is there a structure plan (or similar) providing direction?
• Does that strategic plan consider bushfire matters?
• Outline of Proposal • Conceptual plan
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Information
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Qualitative judgement/risk assessment
• For sites where development needs to be carefully considered, additional information is required:
• Landscape scale assessment • Bushfire behaviour (landscape and local scale)
• Access and egress both to the site and within the site
• Proximity of the site to a settlement or township area
• Proposed bushfire protection measures
• Other information that may be necessary: • More information on the proposal (vulnerability)
• Comments from Integrated Fire Management Planning/ Emergency Management
• Vegetation controls/management 22
Information
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Case Study
• Vegetation, topography and other factors?
• What are the likely bushfire risks?
• Forms of bushfire attack?
• Mitigation measures?
• Relationship with other planning objectives/ requirements?
• Residual risk – is it acceptable?
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‘CREATING A
SAFER
COMMUNITY’ For more information visit
www.cfa.vic.gov.au