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Urban Heat Island Mitigation - Coggle Diagram
Urban Heat Island Mitigation
Reduction Activities
voluntary
urban forestry programs: tree planting and maintenance to increase shading and cooling
weatherization: improves building efficiency especially in low income housing
ex: ECA applying cool roof coatings in Philly
policy
tree and landscape ordinances: laws that ensure public safety, protect trees, or views
comprehensive plans and design guidelines: integrate heat reduction into city design in the long term
Cool Roofs
roofing system designed to reflect more sunlight and absorb less heat
uses coatings containing additives that improve adhesion, durability, and helps with maintenance
elastomeric coating
reduce brittleness, improve adhesion, provides a waterproof membrane
cementitious coating
pervious, rely on the underlying roof material for waterproofing
Green Roofs
layer of vegetation that partially or completely covers a rooftop that provides cooling
extensive
deeper soil
intensive
shallower soil
Trees and Vegetation
cooling
shading
evapotranspiration
Urban Heat Island Basics
factors that affect UHIs
level of vegetation
properties of material
color
qualities of surface material
heat capacity
solar reflectance & thermal emittance
urban geometry
Cool Pavements
conventional (asphalt) pavements are typically dark, impervious, and absorb large amounts of heat
permeable pavement
reflective pavement