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Urban Tree Canopy Assessment for The City of Tukwila, WA

Urban Tree Canopy Assessment for The City of Tukwila, WA. Ian Scott Davey Resource Group November 1, 2012. Why Tree Canopy?. Measure Quality Public Tree Inventory (i-Tree Streets) Private Tree Inventory (i-Tree Eco) Measure Quantity Tree Canopy Assessment. How Did We Do It?.

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Urban Tree Canopy Assessment for The City of Tukwila, WA

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  1. Urban Tree Canopy AssessmentforThe City of Tukwila, WA Ian Scott Davey Resource Group November 1, 2012

  2. Why Tree Canopy? • Measure Quality • Public Tree Inventory • (i-Tree Streets) • Private Tree Inventory • (i-Tree Eco) • Measure Quantity • Tree Canopy Assessment

  3. How Did We Do It?

  4. Quality Control/Quality Assurance • Kappa Coefficient • (Tukwila = 0.9315) • i-Tree Canopy (~23%)

  5. Results • City Wide • The city limits of Tukwila encompass an area of 9.99 square miles (6,396 acres). • 25% ‒ Canopy, 1,616 acres • 51% ‒ Impervious surfaces, 3,242 acres • 18% ‒ Pervious surfaces, 1,132 acres • 5% ‒ Open water, 299 acres • 2% ‒ Bare soils, 108 acres

  6. Results

  7. Results % Land Cover By Zone

  8. Results Acres of Land Cover By Zone

  9. Results Land Cover By Zone

  10. Results Canopy in Parks

  11. Results

  12. Neighbor Cities Canopy Context (%)

  13. Neighbor Cities Seattle Tukwila Renton

  14. Setting Goals Potential Canopy

  15. Setting Goals Potential Canopy

  16. Communicating Value I Tree VUE – Pollution Benefits by the Numbers • Stored Carbon ~ 71,000 Tons  $1.4M • Sequestered Carbon ~ 2300 Ton/yr  $48K • Carbon Monoxide (CO) ~ 4.3 Ton/yr  $4K • Nitrogen Dioxide (NO2) ~ 10 Ton/yr  $89K • Ozone (O3) ~ 4.3 Ton/yr  $240K • Sulfur Dioxide (SO2) ~ 8.5 Ton/yr  $18K • Particulate Matter ~ 15.7 Ton/yr  $94K • Yearly Benefit  $423K

  17. Communicating Value Google Earth • Exploring Potential Planting • Change in Time

  18. Communicating Value

  19. Communicating Value

  20. Questions?

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