VEGETATED CANOPIES IN URBAN SPAIN

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Context

The increasing challenges of heatwaves and wildfires in Europe due to climate change

Details

• Europe is experiencing severe heat waves and wildfires due to climate change, prompting discussions on the role of global warming in intensifying these events.

Impact of Climate Change

• Greenhouse gas emissions have elevated global temperatures by about 1.2 degrees Celsius since pre-industrial times.
• Heatwaves will persist and worsen until greenhouse gas emissions are reduced, leading to rising temperatures.

Mitigation Measures

• Introduction of vegetated awnings or canopies to combat heat and enhance urban areas. Example from Spain's Santa Maria Street in Valladolid.

Functionality of Vegetated Canopies

Design and Installation:

• Tensioned sail-like structures attached to building facades, mimicking natural canopies.
• ‘Greenshades’ allow for shade and greenery in commercial streets where vegetation is scarce.

Installation Process:

• Anchors, supports, and geotextile substrate laid down.
• Irrigation system installed for watering the substrate.
• Fertilizer ensures vegetation growth.
• Excess water collected and drained through a connected system.
• Seed mixture projected onto the geotextile.

Vegetation Growth:

• Expected to be fully covered with vegetation after four months.
• Suitable for streets with limited space for tree planting.
• Hydroponic growth with water supply and drainage outlets.

Advantages of Vegetated Canopies

• Temperature Reduction: Utilizes evapotranspiration to cool surroundings and areas under the canopy.
• Air Quality Improvement: Selected plant species absorb gases like carbon monoxide and nitrogen oxide. Substrate filters harmful gases and absorbs sound waves, reducing noise pollution.
• Oxygen Generation: A square meter of canopy generates a year's worth of oxygen for a person.
• Efficient Lighting: Centralized water and light installations. Lights equipped with movement sensors, illuminating streets based on need.
• Contribution to Urban Biodiversity: Canopies could promote urban biodiversity, supporting various wildlife species.

https://indianexpress.com/article/explained/explained-climate/vegetated-canopies-green-spaces-urban-spain-8893918/