arbor/techture: the road to cool cities and urban islands
TRANSCRIPT
Arbor/TechtureArbor/Techture: The Road to Cool Cities and Urban Islands: The Road to Cool Cities and Urban Islands
Demetra J. McBrideManager, Natural Resources
Environmental Resource ManagementSarasota County, Florida, USA
Trees – The Historical Perspective
• As a Strategic Economic Interest– Transportation– Fortress– Smelting– Shipbuilding– Weaponry– Value Trade Commodity
• As a Social Interest– Shelter– Fire– Hunting and Food– RELIGION
• As a Environmental Interest– Soil Composition & Erosion– Wildlife Habitat
Babylon: Ancient Eco-Metro & First Recorded Green Roof?
NAPOLEON BONAPARTE
First Road Engineer to UseGreen Infrastructure
So WhatSo What’’s That Got To Do With Today?!s That Got To Do With Today?!
• More than 50% of theWorld Lives in Cities
• Around 80% of EuropeLives in Cities
• More than 80% of theUnited States . . .
. . . Lives in aCity
And This is How We’ve Been Building Them
Both dense urban centers, of a uniformimpervious composite, in a vertical designthat frustrates atmospheric mixing . . .
. . . And suburban expansions, where theimpervious surfaces are not just desirable(homestead footprints) but necessary (theDesign of Vehicular Necessity)
Helping the World to Actually Look Like This…
… And Creating Urban Heat Islands
Urbanization converts permeable area to impermeable surfaces, such as roofs, roads, buildings, andparking lots – which trap radiant energy from the sun.
The accumulation of this stored energy eventually makes it impossible for the heat to dissipateovernight. This leads to “urban heat island effect,” marked by higher pollution levels, poor airquality, increased energy consumption, more runoff with higher pollution levels, and creation ofmicro-climates.
Heat EventsImpact Upon Human Health
Impact on Surface and Coastal WatersThermal Pollution
Impact on Air QualityIncreased Energy Consumption & Independent Climates
Heat Wave – Chicago1995
After 48 hours of continuous exposureto heat, the body’s defenses beginto fail.
By Friday, July 14th, thousands ofChicagoans had developed severeheat-related illnesses.
Twenty-three hospitals went on bypassstatus, closing their emergencyroom doors. Ambulance crewsdrove around the city for miles,looking for an open bed.
Nearly 700 people died.
Heat Wave –Europe 2003
Most of France’s 14,802fatalities took placeamong the elderly.
The heat wave not onlyprovoked a continentalhealth crisis, but theattendant droughtcrashed food crops insouthern Europe.
The Role of Trees
Hardscape lifespan, energy consumption, realestate values (incl. turnover, vacancy, workforce)
Economic, retail stimulus
Air quality, microclimate control, health indicator
Coastal Integrity, Erosion, Thermal Pollution, Healthy Waters
CombiningNaturalSystemswithManmadeTechnologiesfora“TreatmentChain”
DesignforLivingStreetsandUrbanIslands
• Development Costs reduced• VMT are drastically reduced• Gray Infrastructure Becomes
Context-Sensitive• Promotes Walkable, Recreational
Urban Centers• Promotes Public Health• Dollars of the Conventional
Operating Model can be Moved toOther Social, Environmental andEconomic Initiatives
Infrastructure Chains Connect the Resources of our Presentwith the Technology of our Future
Demetra J. McBrideManager, Natural Resources
Environmental Resource ManagementSarasota County
1001 Sarasota Center BoulevardSarasota, Florida 34240
SICCUHI September 20-23, 2009Berkeley, California