Defining Urban Forest Assets: Tree Assessments and Inventories

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1 Defining Urban Forest Assets: Tree Assessments and Inventories Dana Karcher Market Manager Davey Resource Group Richard Adkins Forestry Supervisor - City of Phoenix

2 Today s Road Trip Why? Inventory Facts Results Tools Questions

3 A tree inventory is Data Maintenance Tool Management Tool Research Tool

4 To Put It Simply Why a tree inventory? Location Operations Reduce Risk Plant Trees Urban Forest Composition Work Performance Future Needs Research

5 Timing is Everything Deadline Planning to be done or revised? Resources

6 Players or Performers In-house Out-source Volunteer Drive by Techno-arborists

7 Players or Performers Cost Priority In-House Resources Credentials Volunteers $-? Low Low to Moderate Low In-House Staff $$-? Low to Moderate High Varies Outsource (Contractor) $$$ Moderate to High Low High

8 Location, location, location Need Funding Time

9 What data should be collected?

10 Features Attributes Values

11 Inventory Data Fields GIS/GPS Blockside Identification Diameter (DBH) Condition Maintenance Recommendation Conflicts

12 Individual Tree Attributes Species Botanical: Washingtonia filifera Species Common: California Fan Palm DBH: 29 inches Height: 35 Feet Wood Condition: Fair Foliage Condition: Good Maintenance Required: Mature Tree - Routine

13 Individual Tree Attributes Grow Space: Other Maintained Removal Recommended: No Site Rating: Average Placement Rating: Average Contribution Ratings: Low Comments : Trunk decay; decay patched with concrete

14 Individual Tree Attributes Species Botanical: Pinus halepensis Species Common: Aleppo Pine DBH: 26 inches Height: 50 Wood Condition: Good Foliage Condition: Good Maintenance Required: Mature Tree - Routine Ground: Medium Decomposed Granite

15 Comments: Minor deadwood; Minor root Individual Tree Attributes Grow Space: Frontage Road Median Removal Recommended No Removal Site Rating: Average Placement Rating Average Contribution Ratings: Average

16 Data Results: Individual tree locations Tree characteristics Tree condition Recommendations What else?

17 Population Composition

18 Species Richness

19 Tree Population

20 Tree Population 75.00% 60.00% 45.00% 35.13% 36.13% 30.00% 24.02% 15.00% 0.00% 3.70% 1.74% 2.61% 0.00% Excellent Very Good Good Fair Poor Critical Dead Maintenance Number of Trees Percentage Priority 1 Removal Priority 2 Removal Priority 3 Removal Priority 1 Prune Priority 2 Prune Large Tree Routine Prune Small Tree Routine Prune Training Prune Totals 1,

21 Distribution of Trees by Genus Acer (maple) Celtis (hackberry) 30.00% 25.00% 26.07% 22.04% 26% 10% 6% 6% 5% Quercus (oak) Prunus (cherry) 20.00% 17.19% 42% 5% Ulmus (elm) 15.00% 10.00% 14.96% 10.68% Lagerstromeria (crapemyrtle) other 5.00% 0.00% 5.09% 2.79% 0.74% 0.43% 1" - 3" 4" - 6" 7" - 12" 13" - 18" 19" - 24" 25" - 30" 31" - 36" 37" - 42" 43"+ Percent of Trees by DBH Class

22 Money does grow on trees.

23 i-tree 3.0 Resource Analysis Determines Direction Results based Uses with Stakeholders

24 i-tree Streets Carbon dioxide sequestered Carbon dioxide stored Air quality improved Energy saved Property value increased Stormwater

25 i-tree Streets - Distribution Broadleaf Deciduous & Semi- Deciduous 18% Broadleaf Deciduous & Semi- Deciduous Small 3% Broadleaf Evergreen Large 6% Broadleaf Evergreen Medium 3% Broadleaf Evergreen Small 12% Broadleaf Deciduous & Semi- Deciduous Large 2% Conifer Large 10% Palm Large 4% Palm Medium 3% Palm Small 39% Conifer Small <1%

26 i-tree Streets - Distribution California palm 19.3% Mexican fan palm 15.6% Aleppo pine Chinese elm Velvet ash Canary Island date palm Mediterranean fan palm India rosewood Date palm Olive 6.7% 5.6% 4.6% 4.2% 3.2% 3.2% 3.2% 3% Other Species 31.4%

27 i-tree Streets - Distribution Encanto Park Ideal 20 % DBH Class

28 i-tree Streets - Distribution % Ideal Aleppo pine Chinese elm Velvet ash India rosewood Olive -10 DBH Class % Ideal California palm Mexican fan palm Canary Island date palm Mediterranean fan palm Date palm DBH Class

29 i-tree Streets - Distribution $70,000 $1,250 - Pest Management $60,000 $1,250 - Inspection/Service $50,000 $6,250 - Removal $6,250 - Infrastructure Repairs $40,000 $9,000 - Administration $30,000 $12,500 - Pruning $20,000 $12,500 - Planting $10,000 $18,750 - Litter Clean-up $0 $80,000 $70,000 $60,000 $50,000 $40,000 $30,000 $20,000 $10,000 $0 $1,569 - CO2 $3,797 - Stormwater $3,871 - Air Quality $18,665 - Energy $47,849 - Aesthetic/Other

30 i-tree Streets - Distribution Net Loss $21,899 $100,000 $90,000 $80,000 $70,000 $60,000 $50,000 $40,000 $30,000 $20,000 $10,000 $0 Annual Benefits $75,751 Annual Investment $97,650

31 i-tree Streets-Benefit Analysis Common Name % Total Number of Trees Leaf Area (ft 2 ) % Total Canopy Cover (ft 2 ) % Total Energy $/Tree Stormwater $/Tree Crape Myrtle (17.9%) 3, ,227 (.6%) 321,634 (2.7%) Southern Magnolia (2.1%) ,678 (2.6%) 324,275 (2.8%) American Sycamore (1.1%) 222 1,145,671 (4.6%) 321,312 (2.7%)

32 Public Public Education

33 i-tree is Simple! Perform a complete area or segment sample inventory OR You have an existing tree inventory that contains at least these three fields: DBH Condition Species

34 National Tree Benefits Calculator Based on i-tree Ease of use Clearly stated benefits

35 National Tree National Benefits Tree Calculator What do the dollar amounts mean? Stormwater Eliminate water run-off, source point pollution Property Values Aesthetics and LVA Energy - Money that is NOT spent on heating and cooling Air Quality - Absorption and Interception CO2 Sequestered and Avoided, Energy Savings

36 National Tree National Benefits Tree Calculator Chinese Elm $1875 Stone Pine $274 Japanese Maple $923

37 National Tree National Benefits Tree Calculator Valley Oak $515 Red Bud(s) $44

38 National Tree Calculator National Tree Benefits Calculator DBH Tree Value Property Value Electricity Stormwater Air Quality CO2 Chinese Elm 26 $ $ $ $ $ $ 3.21 Chinese Elm 28 $ $ $ $ $ $ 3.28 Chinese Elm 26 $ $ $ $ $ $ 3.21 Japanese Maple 7 $ $ $ $ 2.25 $ 6.05 $ 1.18 Japanese Maple 8 $ $ $ $ 2.66 $ 7.17 $ 1.41 Japanese Maple 8 $ $ $ $ 2.66 $ 7.17 $ 1.41 Valley Oak 32 $ $ $ $ $ - $ 3.65 Deodar Cedar 40 $ $ $ $ $ $ 5.68 Stone Pine 32 $ $ $ $ $ $ 4.53 Camphor 22 $ $ $ $ $ 2.11 $ 3.78 Chinese Pistache 22 $ $ $ $ 5.23 $ $ 1.51 Red Bud 3 $ $ $ 1.22 $ 0.38 $ 0.97 $ 0.09 Red Bud 3 $ $ $ 1.22 $ 0.38 $ 0.97 $ 0.09 Magnolia 14 $ $ $ $ 6.93 $ 5.99 $ 1.00 Crape Myrtle 8 $ $ $ 4.24 $ 1.32 $ 3.12 $ 0.27 Total $4, $3, $ $ $ $ 34.30

39 Today s Road Trip Inventory Facts Planning & Purpose Results Based on Spec and/or BMP s Tools Education, Results, i-tree Questions

40 Thank You! Dana Karcher Davey Resource Group Richard Adkins City of Phoenix