Boreal Foothills Recent IndustrialCaused Forest Change DRAFT RESULTS

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Boreal FoothillsRecent Industrial-Caused Forest
ChangeDRAFT RESULTS
Peter Lee Executive Director
November, 2006
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What recent industrial activities were considered?
Clearcuts
Oil and gas
Mines
Roads
Gravel pits
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Study Area Majority of the Boreal Foothills
Ecoprovince (southern portion) 70,000 km2
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What was our methodology?

• Data source Landsat TM and ETM images
• Three image dates
• 1. 1990
• 2. 2001
• 3. 2006
• Through image differencing visual cleaning,
  industrial-caused disturbances from two time
  periods were extracted
• 1. 1990-2001
• 2. 2001-2006

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Industrial Disturbances 1990-2006 Total
disturbance area 6,258 km2 (9 of study area)
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Industrial Disturbances 1990-2001 (Buffered 500
m) Total disturbance area 30,000 km2 (42 of
study area)
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Industrial Disturbances 2001-2006 (Buffered 500
m) Total disturbance area 18,000 km2 (25 of
study area)
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Industrial Disturbances 1990-2001 2001-2006 (B
uffered 100 m, 500 m and 1,000m) 55 of study
area disturbed when 500 m buffer applied
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Industrial Disturbances 1990-2006 (Buffered 500
m) Note black box area of zoom for
following slides
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September 15 1990
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September 16 1999
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July 14 2005
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What are our next steps?

• Expert and stakeholder review of methodology and
  draft results
• Further data cleaning and checking
• Verification using secondary data sources
• Analysis
• Publication

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www.globalforestwatch.ca