logo
Inspiration Card
Nature Based Solution
Urban Network Structures

N2 Boulevards

Copyright
Boulevards between streetcar tracks, Stuttgart
QR Code for https://unalab.eu/en/node/163
Challenges
Climate Resilience Water Management Natural and Climate Hazards Biodiversity Enhancement Air Quality Health and Well-being Social Justice and Social Cohesion
✔ ✔ ✔ ✔ ✔
Description

Boulevards represent a possibility to establish several trees in cities to mitigate urban heat stress, while providing additional benefits like improving water management and climate resilience. For boulevards, trees are commonly arranged along both sides of streets, bicycle paths and sidewalks. The treetops often form a nearly closed canopy and, as a result, the area between the two tree lines is shaded and the air temperature is lower.

Conditions for Implementation
  • Appropriate species selection
  • Sufficient above and below ground space
  • Soil material and depth
  • Consideration of built environment characteristics
Similar Terminology
Double-line street trees
Performance
    Cooling Service Transpiration ● ● ○
    Shading ● ● ○
    Evaporation ● ○ ○
    Building (Insulation) ○ ○ ○
    Reflection (Albedo) ● ● ○
    Surface Water Regulation Water Conveyance ○ ○ ○
    Water Infiltration ● ○ ○
    Water Retention ● ○ ○
    Water Storage ○ ○ ○
    Water Reuse ○ ○ ○
    Water Purification Water Filtering ○ ○ ○
    Water Bio-remediation ○ ○ ○
    Air Purification and Noise Reduction Deposition ● ○ ○
    Air Biofiltration ● ○ ○
    Noise Reduction ○ ○ ○
    Biodiversity Habitat Provision ● ○ ○
    Connectivity ● ○ ○
    Socio-Cultural Services Beauty / Appearance ● ● ○
    Usability / Functionality ● ○ ○
    Social Interaction ● ○ ○
    Education ○ ○ ○
    Provisioning Service Food / Energy / Material ● ○ ○
    Climate Regulation CO2 Sequestration ○ ○ ○