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What Is an Urban Heat Island?

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İKLİM TASARIM 1

SICAKLIK

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• Somewhat appropriate, where we would be comfortable in at least one city within the classification area; and Least Appropriate, where at least one of us would not be

comfortable. When broken down into these categories, the map now looks like this:

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New York City 14 August 2002

The cooling effect of urban vegetation

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What Is an Urban Heat Island?

• As urban areas develop, changes occur in their landscape. Buildings, roads, and other

infrastructure replace open land and vegetation.

Surfaces that were once permeable and moist

become impermeable and dry.

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These changes

cause urban regions to become warmer than

their rural surroundings, forming an "island" of

higher temperatures in the landscape.

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What Can Be Done?

• Communities can take a number of steps to reduce the heat island effect, using four main strategies:

– increasing tree and vegetative cover

– creating green roofs (also called "rooftop gardens"

or "eco-roofs")

– using cool or green pavements

– installing cool or reflective roofs

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Xeriscape

Landscaping philosophy that seeks to minimize the need for water.

1. Proper planning and design 2. Soil analysis / improvements 3. Appropriate plant selection 4. Practical turf areas

5. Efficient irrigation 6. Use of mulches

7. Appropriate maintenance

Xeriscape in Colorado

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MASHRABIYA

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USA ASLA

SUSTAINABLE SITE INITIATIVE

Reduce urban heat island effects: Use vegetation to reduce heat island effect,

minimizing effects on microclimate. Design options in addition to vegetative shade include covering structures with solar photovoltaic panels, installing vegetated roofs and/or surfaces with a solar reflectance index (SRI) of at least 29, using paving

materials with an SRI of at least 29, and using an open-grid pavement system (e.g.

concrete-grass lattice).

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http://www.scielo.org.mx/pdf/atm/v30n4/0187-6236-atm-30-04-355.pdf

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http://www.scielo.org.mx/pdf/atm/v30n4/0187-6236-atm-30-04-355.pdf

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