Council is planting hundreds of trees across three locations in the lower Blue Mountains to combat increased temperatures associated with loss of tree canopy cover.

Greening our City is a tree planting project funded by the NSW Government grant as part of the Greening our City Premiers Priority, in association with Local Government NSW.

The project involves canopy renewal to mitigate the ‘urban heat island effect’ which is an increase in temperatures in some of our villages and town centres.

 

Frequently Asked Questions

Who is funding this project?

Council applied for, and received, $116,310 funding from the Greening our City Program. 


Why is this happening?

The NSW Department of Planning, Industry and Environment (DPIE) is undertaking the Greening our City Program to increase tree canopy and green cover across the Greater Sydney Region by planting one million trees by 2022.

As part of this, DPIE has implemented this grants program to incentivise tree planting and green cover activities across the 33 Local Government Areas in Greater Sydney.

 

How does planting trees help?

The locations selected for canopy renewal are Winmalee, Blaxland and Glenbrook as these have been identified as places where an urban heat island* or increased ambient air temperatures are being experienced, with associated loss of tree canopy cover.

Canopy renewal is an essential mitigating measure to address climate change, improve existing low cover areas and make our City cooler, greener and more connected. 

Trees play an important role in creating great places for our communities, enhancing outdoor recreation and exercise opportunities, and they improve air quality by removing fine particles.

Trees also extend habitat for animals and birds, helping to increase the biodiversity of our urban areas.


*What is the urban heat island effect?

The term 'urban heat island' (UHI) refers to the temperature difference between built up (urban) areas compared to the rural or vegetated surrounds. This temperature difference occurs due to the increased hard and dark surfaces in built up areas that absorb and radiate heat and is worsened by a lack of shade provided by vegetation and canopy trees. 

The UHI effect can have detrimental impacts on the health and wellbeing of our community and the comfort levels of our homes and workplaces. Research has shown greening streets and our parks  can significantly reduce urban heat, with canopy trees reducing daytime surface temperatures by between 5–20°C which in turn reduces the ambient air temperature. This occurs through canopy trees shading hard and dark surfaces and through the process of evapotranspiration.

Evapotranspiration is the combination of two processes: evaporation and transpiration. These processes cause water to evaporate from plant leaves, releasing moisture into the air and cooling down the plant and the surrounding environment.


Where are the locations of the plantings? 

The locations identified for tree plantings are:

(Click on the links to see locations of the plantings. Note: The green polygons show ‘indicative planting locations’ only and are not exact.)

 

Why is this only happening in the certain locations?

The locations selected for canopy renewal are those identified by heat mapping technology as a hot spot. For more information on areas affected by increased temperatures see the NSW Government Greening our City Online Spatial Tool.

 

How many trees will be planted?

Council is planting approximately 51 trees at Winmalee, 61 at Glenbrook and 272 at Blaxland. 

 

What species are they?

Plant species have been selected to: 

  • Complement the existing trees and planting layout within the streetscape or park;
  • Respond to site constraints such as narrow verges, underground services and overhead power lines;
  • Incorporate indigenous species to enhance bushland character of the locality and highlight species associated with locally occurring Threatened Ecological Communities, Shale Sandstone Transition Forest;
  • Enhance the village and park amenity by including deciduous Acer species (Maple) at suitable locations;
  • Complement other Council projects seeking to improve water quality with rain gardens and biofiltration stormwater upgrades of drainage lines (Lennox & Whitton parks);
  • Incorporate advanced tree stocks comprising 45L pots (approximately 1.5m height) in street tree and feature park planting; and
  • Provide a cool riparian planting belt using local provenance tube stock (6 inch pots) in locations that complement Council’s stormwater biofiltration drainage works.
     

The species at Winmalee are a mix of native Eucalpyt, other native species and Maples.*  This includes Angophora costata, Eucalyptus fibrosa, Eucalyptus sclerophylla, Eucalyptus punctata, Syncarpia glomulifera,  Tristaniopsis laurina and 6 Acer platanoides ‘Crimson sentry’.

The species at Lennox Park Blaxland will be tube stock plants to form a riparian corridor comprising Backhousia myrtifolia, Glochidion ferdinandi, Acmena smithii, Callicoma serratifolia, Trema tomentosa var. aspera, Eucalyptus punctata, Eucalyptus crebra.* 

The species at Whitton Park, Glenbrook are a mix of Eucalypts, other native species and Maples.* 21 tree stock will be advanced stock comprising Eucalyptus sclerophylla, Acacia elata, Eucalyptus sclerophylla, Angophora costata, Eucalyptus punctata and 40 will be tube stock (6 inch pot) plants to form a riparian corridor comprising native species Backhousia myrtifolia, Chlochidion ferdinandi, Callicoma serratifolia, Trema tomentosa var. aspera, Acmena smithii, Eucalyptus punctata, Eucalyptus crebra.

*Note – alternative suitable species may be substituted subject to availability.

 

How will the trees be maintained?

A landscaping contractor will manage and maintain the trees for 18 months after planting.

All advanced stock will be planted in accordance with the Council’s Public Domain Technical Manual PL3 for street tree in grass verge with and PL5 Temporary tree staking.

Some of the trees at Winmalee will have Street Tree Barrier (i.e. timber frames in accordance with Council’s Public Domain technical manual PL4) to ensure successful establishment in high traffic areas.

All trees planted will be mulched with a spade edge (advanced stock) or 150mm coir log edging (riparian areas) enhancing the look and feel of the area. 

 

Who can I contact for more information?

If there are any further questions or concerns regarding the project, please contact Fiona Nagel, Program Leader Environment & Landscape, fnagel@bmcc.nsw.gov.au or 4780 5000.


This project is part of the Greening Our City grant program that is proudly funded by the NSW Government in association with Local Government NSW.