Blue & Green Infrastructure as a mitigation measure for heat - - PowerPoint PPT Presentation

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Sep 15, 2022 547 likes •748 views

Blue & Green Infrastructure as a mitigation measure for heat stress Dr Debbie Bartlett University of Greenwich, UK Spatial adaptation for heat resilience in small and medium sized cities | Middelburg, NL | 20 February 2019 Built environment

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Blue & Green Infrastructure as a mitigation measure for heat stress

Dr Debbie Bartlett

University of Greenwich, UK

Spatial adaptation for heat resilience in small and medium sized cities | Middelburg, NL | 20 February 2019

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Built environment people experiencing discomfort In public open space Lack of air movement

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Cooling the microclimate

Reducing incident radiation

Shade
Reflecting radiation

Reducing conductivity

Light colour
Texture

Evaporation

Water feature
Misting/spraying on surfaces
Vegetation

Perception of coolness

Fluttering material
Movement of water
Rustling of leaves

Air movement

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Blue & green infrastructure

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Which intervention is most suitable?

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Each situation is different

Interventions all have

Benefits for the microclimate
Disbenefits
Co (additional) benefits

Understanding these helps make decisions

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Effectiveness depends on:

Foliage shape and dimensions
Leaf area density
Seasonal cycle
Daily transpiration

For shade:

Height of trunk
Canopy spread

Tree planting

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Evapo-transpiration cooling Shade maintenance – watering time to grow clearing fallen leaves aesthetics recreation, relaxing, health, air quality biodiversity

Benefits Disbenefits Co-benefits

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Green Walls and Facades

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Evapo-transpiration cooling Reduces effect of building material maintenance watering, trimming installation costs insulation – internal cooling aesthetics air quality biodiversity

Benefits Disbenefits Co-benefits

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Swales and Rain Gardens

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Evapo-transpiration cooling maintenance - trimming may collect litter flood mitigation aesthetics recreation, relaxing, health, biodiversity - pollinators

Benefits Disbenefits Co-benefits

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Water features

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Evapo-transpiration cooling physical cooling (contact) zoonoses (contact) safety aesthetics biodiversity

Benefits Disbenefits Co-benefits

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So how do you decide?

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