Tree Canopy Assessment - Seattle 2016 LiDAR Canopy Cover Assessment Seattle’s Urban Forestry Team...
Transcript of Tree Canopy Assessment - Seattle 2016 LiDAR Canopy Cover Assessment Seattle’s Urban Forestry Team...
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Seattle 2016 LiDAR Canopy
Cover Assessment
Seattle’s Urban Forestry Team
May 8, 2017
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- Introduction
- Background
- 2016 LiDAR canopy cover assessment
- Technology
- Research questions
- Study Findings
- Equity
- Canopy cover change
- Development impacts
- Using the data
Today’s presentation
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Project team
FAS
OSE
Parks
SCL
SDCI
SDOT
S. Ctr.
SPU
Urban Forestry CommissionUniversity of Vermont
Spatial Analysis Lab
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What is urban forestry?
Urban forestry is the care and management of
trees and understory plants in urban areas for
the purpose of improving the urban
environment.
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Wild forest vs. urban forest
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The importance of trees
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Background
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Seattle’s commitment
Seattle’s urban forest is a
thriving and sustainable
mix of tree and
understory species and
ages that creates a
contiguous and healthy
ecosystem that is valued
by the City and all Seattle
residents as an essential
environmental, economic,
and community asset
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Urban Forest Stewardship Plan
• Establishes goals - 30%
citywide canopy cover
• Long-, mid-, and short-
term strategies for
achieving goals
• Implemented through
annual workplans
• Managed via inter-
departmental team
• To be updated in 2018
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1. Create an ethic of stewardship
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2. Replace/enhance benefits
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3. Expand canopy to 30% by 2037
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4. Increase health/longevity
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Tracking progress
• SDOT, Parks inventories
• 2016 canopy cover assessment
• 2012 Seattle’s Forest Ecosystem
Values
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Past assessments
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2016 LiDAR Canopy Cover
Assessment
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Jarlath O’Neil-DunneUniversity of Vermont
Spatial Analysis Lab
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LiDAR technology
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Calculating canopy cover
91,776 acres (total area of the city including water)
- 38,271 acres (area of water within the city boundary)
= 53,505 acres (total area without water)
15,167 acres (total area of tree canopy) / 53,505
=
Canopy Cover
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Research questions
• Progress on citywide 30% goal
• Canopy cover in Seattle neighborhoods
• Progress on targets in different
management areas
• Canopy cover in underserved
neighborhoods
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Study Findings
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Progress achieving 30% canopy
cover
28%
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Progress achieving targets by
Management Unit
ROW = 27% of land
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Progress achieving targets by
Management Unit
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Progress achieving targets by
Management Unit
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Progress achieving targets by
Management Unit
ROW = 22% of total canopy
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What’s the canopy cover in different
areas of Seattle
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What’s the canopy cover in different
areas of Seattle
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What’s the canopy cover in different
areas of Seattle
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Canopy cover in SDOT’s Street Tree
Management Units
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Conifer to deciduous tree ratio
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Largest trees and tree groves
6,338
large
trees
3,188
tree
groves
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Relationship between canopy and
environmental equity
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Relationship between canopy and
environmental equity
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Equity implications
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Tree canopy and heat island effect
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Canopy within SCL’s 10ft minimum
clearance distance
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Canopy cover trend
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Canopy cover trend
UW special collections
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Canopy cover trend
QueenAnneView.com
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Canopy cover trend
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Urban forest challenges
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Development Impact
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Using the findings
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Conclusion
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Links
Final report and webinar recording:
http://www.seattle.gov/trees/canopycover.htm
GIS canopy cover layer:
https://data.seattle.gov/dataset/data-seattle-gov-GIS-
shapefile-datasets/f7tb-rnup/data