Project funded
by theEU–DGEnvironment
L
andsurfacerelevant
forapplication
Artificial surface
Agriculture land
Forest and semi-natural areas
Wetlands
F
inancialcosts
(C
apital
,
operation
&
maintenance
)
The capital costs of trees will depend on the
age
at which they are planted, with
older, larger trees being more expensive than younger, smaller trees. The costs
of pruning and maintaining trees need to be considered when planning trees in
urban areas. In dry or drought prone areas, this measure may incur additional
costs associated with
irrigation.
D
esign
Urban trees are typically located in
parks
and
along roadways
. The space
required for urban trees will depend on their crown size and root network.While
crown size can be managed through pruning, the root network of urban trees is
potentially extensive and may cause damage to existing underground infrastructure,
especially leaky sewers which trees may tap for water and nutrients. Trees in urban
areas have synergies with urban forests and other urban measures.
S
cale
The measure can be implemented at a
very local scale (less than 0,1km
2
).
Trees in urban areas can have
multiple benefits
related to aesthetics, microclimate regulation and urban hydrology. They can also be important biodiversity
refugia and can contribute to reducing particulate air pollution. Trees intercept precipitation, and the area around urban trees may also have greater infiltration
capacity than the impermeable surfaces often found in urban areas: both of these reduce the amount of rainfall which must be processed by sewers and other
water transporting infrastructure.
FORESTRY
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