STRATUM:Reporting & Interpretation

Generating & Interpreting ReportsOROR

Resource Structure Analysis: 15 Basic ReportsPopulation SummarySpecies DistributionRelative Age DistributionImportance ValuesConditionRelative Performance Index (RPI)Stocking LevelMaintenance RecommendationMaintenance TaskLand UseLocationConflictsCanopy CoverOtherReplacement Values

Benefit-Cost Analysis ReportsAnnual BenefitsEnergyStormwaterAir QualityCarbon DioxideAesthetic/otherAllManagement Costs

Net Annual Benefits

STRATUM ReportsGlobal Exports to Excel SpreadsheetsCan interface with graphs and change themManipulate data and select your own format typeScreen Prints to PDF, Word and RTF filesAs viewed on screen - ready for reports, publicationsFixed formatting on some reports

Generating Reports

Screen Tools for Viewing Reports

STRUCTURAL Reports

1. Population SummarySummaries or complete lists of inventoried species, their total numbers, numbers by Tree Type, numbers by default DBH size classesBasic understanding of species frequency citywide, Management Zone, and DBH size classes

2. Species DistributionSpecies composition - 10 most prevalent species displayed in % of total numbers.Understanding of species dominance in terms of tree numbers

3. Relative Age DistributionTree age, relative to DBH size class for 10 prevalent species or by management zone.Use to determine current mgmt. Needs and how needs change based on total numbers and aging of individual species. Ideal distribution has high proportion of new transplants to offset mortality, while % older trees declines with age.

4. Importance ValuesMean of 3 relative values (% tree numbers, leaf area, canopy cover) for most prevalent species.Suggest communitys reliance on functional capacity of particular species:IV = 0 = no relianceIV = 100 = total reliance

5. ConditionStructural (woody) and functional (foliage) condition data for entire population and most prevalent species.Indicates how well trees are managed and relative performance given site-specific conditions

6. Relative Performance Index (RPI)Indices based on weighted proportion of each street trees condition classification for all species.Value > 1 indicates species having better condition ratings.Value < 1 are species with below average condition ratings compared with other inventoried trees.

7. Stocking LevelStocking levels and available planting sites for small, medium and large trees as defined in Unmatched Non-tree Species CodesIdentify high priority planting areas, strategic plant purchasing and cost planning

8. Maintenance RecommendationProvides maintenance recommendation as defined in the Data Tree Inventory by Data Fields dialogue by species or DBH size classAssists managers in understanding actual pruning and maintenance needs of the street treesAssists in establishing programmed pruning

9. Maintenance TaskProvides maintenance recommendation as defined in the Data Tree Inventory by Data Fields dialogue by species or DBH size classAssists managers in understanding actual pruning and maintenance needs of the street treesAssists in establishing programmed pruning

10. Land UseLand use associated with each population subsetComparison with tree conflicts, maintenance recommendations and tasks for understanding problem planting sites for specific species

11. LocationTree locations associated with each population subsetComparison with tree conflicts, conflicts, maintenance recommendations and tasks for understanding problem planting sites for specific species

12. Conflicts sidewalk heaveSidewalk heave associated displayed by species, total numbers, or % of numbersUnderstanding current and potential infrastructure related conflicts by species and Management Zone location

12. Conflicts utility wireOverhead utility conflicts displayed by species, total numbers, or % of numbersUnderstanding current and potential infrastructure related conflicts by species and Management Zone location

13. Canopy CoverCC over city land and street areasCurrent vs. desired CC in cityIncreased CC = increased benefitsDecrease pavement costs in some climate regions

14. Other3 table formatted reports based on defined data fields unique to each cityDefined as % of total numbersDavis example Hazard Tree

15. Replacement ValueEstimates the full cost of replacing treesBased on inventoried conditionFirst order estimates (by DBH class & Zone)

Benefits & CostsAre street trees worth the investment?

Benefit-Cost Reporting

EnergySummer SavingskWhWinter Savings Btu

Carbon Dioxide (CO2)4 components:SequesteredAvoidedDecompositionMaintenance

Air QualityDepositionO3NO2PM10SO2AvoidedNO2PM10VOCsSO2BVOC emissions

Stormwater InterceptionNet interceptionInitial Abstraction

Aesthetic/OtherProperty value increaseAestheticsSocialPsychologicalRetail salesNoise abatement

All Benefits$ per treeTotal $

Management CostsAnnual Costs:Internal program expendituresExternal program expenditure

Benefit-Cost Summary Annual BenefitsCostsBCR$/capita$/tree

OROR

Management ConsiderationsThe average tree provides over $125 in annual benefits.Daviss street trees return $5 for every $1 spent on their management.Can Daviss trees sustain this level of benefits?

Management IssuesNeeds to achieve:

Adequate structural complexityAdequate canopy coverAdequate pruning & maintenance

Structural ComplexityPlant species that are well adapted and long-livedReduce over reliance on too few speciesRejuvenation of areas where even, old-aged stands predominateGoal:Achieve adequate structural complexity focused on long-term benefitsHow?:

Stable Canopy CoverPerpetuate current canopy coverSelective removal and replacement where even, old-aged stands predominatePromote additional coverageFill empty spacesPlant large-stature trees where feasibleSelect well adapted and long-lived speciesGoal:Maximize Canopy Cover to offset detrimental effects of hardscape How?:

Pruning & MaintenanceImprove young tree careAdjust pruning cycle: 8 yrs to 4-5 yrsTarget species in the poorest healthGoal:Improve tree condition to increase benefits provided while reducing liability and long-term maintenance costsHow?:

ConclusionDavis has approx. 24,000 street trees.Citywide, the publicly managed trees produce $3.1 million in annual benefits for a total cost of $560,000.Continuing this level of benefits will take strategic program planning:Adequate young tree care.More frequent inspection and pruning.Rejuvenating aging populations.Planting areas void of trees.

STRATUM in PracticeMunicipal BCAMunicipal Tree Resource Assessments/State of the Urban ForestCommunity Forest Management PlansCity of DavisProgram AdvocacyCity of N. Vancouver

Street Tree Resource Analysis/State of the Urban Forest ReportExecutive SummaryThe Tree ResourceManagement CostsAnnual BenefitsManagement ImplicationsResource complexityResource extentMaintenance needsAppendices

Davis Community Forest Management PlanOverviewContext: Existing ConditionsHistory of Tree ManagementAdministration and ManagementState of the Community ForestCommunity Forest Goals, Policies, Standards and ActionsGlossaryAppendiceshttp://www.cityofdavis.org/pcs/trees/cfmp.cfm

STRATUM & Street Tree Master PlansProvide the best SERVICE possibleMost efficient use of resourcesMaximize net benefits of treesIncrease customer SatisfactionCornerstone of compelling case for program funding

Level of Service Analysis Quantifiable measures of capacity or work performedIdentify measures for each program areaTree planting (% full stocking)Young tree care (cycle)Large tree care (cycle)Hazard tree abatement (% dead or dying)Administration ($/tree)Compare Current LOS with Standard and Optimal LOS

Identify Funding SourcesTree planting grantsPublic awareness and volunteer training grantsLocal measures Assessment districtsParcel taxOther revenue sourcesCarbon dioxide emission reduction creditsShade tree programs for energy conservationStormwater managementAir pollution mitigation

Advocacy

Over view of how Scott and Paula will present the sectionProduces 14 basic structural reports presents info in a variety of ways by species, zone, tree type.These reports are each viewed separately under their own titles on screen in STRATUM. Produces 3 basic benefit-cost reports.Reports can be exported in multiple formats briefly reviewToday we will focus on the screen reports and how you will generate these.Toggle between this slide and mirror mode to walk class through screen tools for viewing. Then remain in mirror mode for duration of structure report review. Remainder of slide program to be used for backup if computers go down and for note-taking in binders.Segue to Scott cost benefit plus management implicationsSegue to Scott cost benefit plus management implications