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Urban Forest Strategy - Rationale

A healthy urban forest is critical for any city that prioritises its environmental and social outcomes.

Why is Geelong's urban forest important?

A healthy urban forest is critical for any city that prioritises its environmental and social outcomes. Geelong’s urban forest is a valuable community asset that crosses public and private boundaries enhancing the local environment and providing a green network of spaces for the community to utilise.
Geelong’s urban forest is important as it provides the following benefits:

  • Shade from tree canopies and reduction in sun exposure
  • Reduction of heat exposure during heatwaves
  • Energy savings in buildings through shading of walls and roofs
  • Habitat for wildlife particularly birds
  • Rainfall and stormwater interception resulting in reduced stormwater flows into the bay and rivers
  • Wind abatement
  • Microclimatic moderation for human thermal comfort
  • A unique City brand - attractive well maintained green spaces reflect proactive and innovative Council management
  • A sense of place
  • Amenity and landscape aesthetics
  • Improved property values along tree-lined streets
  • More attractive commercial and retail centres
  • Air pollution amelioration
  • Carbon storage and sequestration
  • A food source
  • A connection to nature especially for children

Did you know...

  • Geelong’s public urban trees are worth over $370 million.
  • Geelong has 75 268 street trees and over 45 000 urban park trees.
  • Geelong’s street trees store 19 000 tonnes of carbon and sequester over 1 300 tonnes per year.
  • Stormwater run-off is 62% higher from asphalt than from turf or tree pits.
  • The public urban forest alone absorbs around four Olympic sized swimming pools of stormwater each year preventing run-off into the bay.
  • The presence of street trees can improve residential property values by up to 30%.
  • Large healthy trees can remove between 60 and 70 times more air pollution than smaller trees.
  • Temperatures can be between 5o Celsius and 20o Celsius cooler underneath tree canopies.
  • Up to 80% of the cooling effect of trees is directly from shading.

Surface Temperature Reduction Examples

Example 1: Orbit Drive Whittington

Time:4:20pmDate:24 February 2015Ambient Temperature:33 degrees Celsius

Unshaded roadway is 15 degrees Celsius hotter than asphalt shaded by a tree.


 

 

Measurement Object
Maximum Temperature (oC)
Minimum Temperature (oC)
Emissions
Reflected Temperature (oC)
Average Temperature (oC)
Profile line (P1)
45.1
30.5
1.0
20.0
41.4

Example 2: Myers Street Haymarket Carpark

Time:5:00pmDate:24 February 2015Ambient Temperature:31 degrees Celsius

Asphalt shaded by trees is 19 degrees Celsius cooler than unshaded asphalt.


 

 

Measurement Objects
Temperature (oC)
Emissions
Reflected Temperature (oC)
Average Temperature (oC)
Measure point 1
 
28.2
1.00
20.0
Shaded
Measure point 2
 
46.8
1.00
20.0
Unshaded
Measure point 3
27.8
1.00
20.0
Shaded
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