Melville urban greening
City of Melville, Western Australia
Melville council in Perth were seeking to understand the correlation between vegetation cover and local temperature to assist in the planning of urban greening strategies and the mitigation of heat stress.
A key part of the project was to understand current vegetation cover and its distribution across private land, public land and road reserves. Additionally, the temperature distribution across the city was to be mapped after a period of extreme heat. These inputs were to form a baseline for future discussions and comparisons.
The analysis was needed across the full 5300 hectares of the city and for each of the 18 suburbs and 167 parks and reserves in the council area.
MNG was commissioned to undertake the project including data collection. Anditi was engaged by MNG to analyse the captured data.
A high-resolution LiDAR point cloud of the city was classified to delineate ground from vegetation and man-made structures such as buildings, roads, fences and light poles. The vegetation components were then analysed to establish vegetation cover and height statistics.
Property information was used to differentiate between trees on private land, road-side areas, and public reserves. Thermal imagery was utilised to derive temperature distributions and profiles across the city.
- Thermal mapping
- Property databases
- Integrated analysis
The investigation revealed that 58% of the vegetation in Melville was on private land, 20% within road reserves, and 22% in parks and reserves. The correlation with temperature in periods of extreme heat was established.
The study’s high-resolution analysis indicated that while the total canopy cover in the city was comparative to previous low-level data, the percentage of cover on private land was actually twice as high as previously thought.
Subsequent and long-term urban greening and heat stress mitigation initiatives, including education, could be planned with greater accuracy with a current, detailed, and city-wide baseline survey in place.
One consistent and integrated analysis across the city
Key facts, metrics and relationships established
Further initiatives informed by fit-for-purpose baseline