Purpose of project
Tree planting date
Planned for late August 2018
Angophora costata (Smooth Barked Apple)
Botanical name (Common name)
Number of Trees Planted
2 x 6 (6 per car park)
Tree Stock Size at Planting
20 - 45L container
Number of Trees Surviving
Survival Assessment Date
Other WSUD type
Owner of Site
City of Belmont
Esther St Belmont WA 6104
The sites are reserves at both ends of Esther Street (cnr Belmont Ave southern end and cnr Robinson Ave at the northern end) - each separated by a distance of ~230m in what is otherwise a developed street.
City of Belmont
If you require details not available here, see contact details.
Case Study Description
Two car parks, N & S. Both are 12m wide x 40m long with x16 parking bays each.
A narrow, 3m-wide strip of open ground along the north side lies in-between the hardstands of the Council carpark and adjacent industrial land of both carparks.
Trees to be planted in centre of strip, six (6) trees per carpark (i.e. 1×3 bays): sp. Angophora costata
Carpark North (control)
- Total surface permeable paved. Product: Midland Brick’s ‘aqua tri-pave’, being a copy of Adbri’s ecotrihex
- Over 50mm depth bedding 3–5mm dia. aggregate
- Over 300mm depth 20–40mm dia aggregate
- Over in-situ native soil (sand), lightly compacted
- Kerb on conventional road base with 300mm ribbed root barrier against back of kerb (RER 300’)
Carpark South (custom soil)
- as described above except:
- Geoweb / cellular confinement system at 200mm depth to hold screenings
- Underlying soil: no compaction other than perhaps one run-over with plate compacter to smooth ground level
- Eight (out of the 16) parking bays in which the in-situ sandy soil is replaced with a custom mix of higher fertility
- Spray-on root barrier at back of kerb (instead of a rigid barrier)
- Vertical steel rods to identify and compare oxygen content between in-situ & custom mix in subsequent years
- Soil analysis (organic content/fertility, Ph) and infiltration rates (hydraulic conductivity) in 4 locations per site
- Annual canopy growth
- Settlement of pavement
The intent is for a design which factors the hardstand as a fully functional proper root-zone, in order to maximise the canopy potential and minimise the likelihood of pavement displacement.
The custom-soil is to be a cost/benefit analysis. Comparing canopy performance correlated with the monetary amenity values.
Design &/or as constructed detail
Depth of Engineered Space
Volume of Engineered Space
Drainage Type Resource/Image/Document
Growing Media Detail
Surrounding Site Soil Detail
Surrounding site soil detail Resource/Image/Document
Stakeholder Support for future projects of this kind