Knysna Fire Report Preface Two fully manned fire stations One sub - - PowerPoint PPT Presentation

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Knysna Fire Report Preface Two fully manned fire stations One sub - - PowerPoint PPT Presentation

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Knysna Fire Report Preface Two fully manned fire stations One sub station One Volunteer (Municipal Employee) Karatara One Volunteer (Municipal employee) Rheenedal Five Pillars Drought Topography Fuel Berg winds

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Knysna Fire Report

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Preface

  • Two fully manned fire stations
  • One sub station
  • One Volunteer (Municipal Employee) Karatara
  • One Volunteer (Municipal employee) Rheenedal
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Five Pillars

  • Drought
  • Topography
  • Fuel
  • Berg winds
  • Strong winds
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Fire on June

  • 1. Kruisfontein Fire at 03h30
  • 2. Lancewood Fire at 04h15
  • 3. Elandskraal Fire at 06h15
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Elandskraal fire response

1. Call received at 06h15 2. Karatara Volunteer responded at 06h20 3. Sedgefield on scene at 06h50

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Investigation Method

  • 1. First flight over area on morning
  • f 8 June 2017
  • 2. Emails from R Morris
  • 3. Area investigated
  • 4. Photographed the area
  • 5. Dr W Vosloo report
  • 6. W Sternsdorf report
  • 7. Weather pattern
  • 8. Eye witness interview
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Evidence collected

  • Emails from relevant residents
  • Photos of smouldering fire
  • Aerial photos
  • Photos of structures in non V Pattern
  • Photos of burn scar with V Pattern
  • Ground photos
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Resident's email 10 May

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Another email from resident 23 June 2017

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Photo received from resident

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Smoulder photo 12 July

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Smoke location

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No V Pattern Area

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Access

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Pottery remains

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Access Path

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Noah’s Ark

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Shed

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Shed damage from Eastern side

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Log damage from Eastern side

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Burn Scar on poles from Eastern side

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V Pattern Burn Scar

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Clearing at bottom of V

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Access to V Section

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Heavy fuel in clearing

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Charring uphill

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Previous fires in area

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Structure in V Path

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Hypothesis 1

  • Based on Dr Vosloo report
  • Fire Originated in non V area
  • Cause – lightning strike on 12 April

2017

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Hypothesis 2

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Testing Hypothesis 1

  • Morris and Vosloo reports one

smoulder

  • Morris photos and location
  • Sternsdorf pointed different location
  • Eye witness confirms Morris and

Sternsdorf locations

  • Wind pattern supplied by Vosloo
  • Vosloo not in Elandskraal on 7 June

2017

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Testing Hypothesis 2

  • Emails, photos and grids R Morris
  • Aerial photos
  • Fire ground investigation
  • Non V Pattern area
  • V Pattern Area
  • Weather Data
  • Burn scar
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Burnt scar

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Final Hypothesis

  • Wild land fires first ignite light

fuels then spread to heavy fuels

  • Fire forms a V and grows

laterally

  • Heavy fuels found in clearing
  • Pine cones out of place
  • Charred logs out of place
  • Access paths
  • Previous human activity
  • Previous fires
  • Wind data and fire spread
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Finding

Origin – V Shape area

  • First ignition point in clearing

Probable Cause

  • Pine cones and stacked heavy fuels

ignited

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Questions?