Belmont WA
Purpose of project


Installation type

Permeable Paving

Tree planting date

Planned for late August 2018

Tree species

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

Contact Details

Contact Name

Vic Bijl (arborist)

Contact Phone

(08) 94 777 102, 0488 909 125

Contact Email

Location Details

Location Address

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

Technical Detail

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
  • Geotextile
  • 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
Drainage Type Resource/Image/Document
Surface Treatment
Growing Media Detail


Surrounding Site Soil Detail


Surrounding site soil detail Resource/Image/Document
Watering Regime


Maintenance Detail

Non-Technical Detail

Challenges Overcome

Stakeholder Feedback
Stakeholder Support for future projects of this kind


Funding Source



Project Cost


Partners/Sponsors Information