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					VEHICLE NAVIGATION AND TEMPERATURE RISE IN THE CITY

Prof.Dr.Orhan KUNTAY

What is urban heat island?


“areas whose temperature are 5-10 oC higher than the neighbouring areas”

Ankamall Türk Traktör Fab. Real

Reasons for the temperature rise in a city
1. 2. 3.

4.
5. 6. 7. 8.

It depends on climate It is related to energy It is geographical It is morphological It is structural It is related to land use in the city It is related to fuel used in transportation It is related to the orientation of the buildings

What are the disadvantages of formation of heat islands?
 

It is advantageous during winter There is a problem during the summer season

Research
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In order to determine the surface heat islands in Ankara, projections of the Landsat satellite were taken for a 10-year period and the heat islands which were heated the most at 8.00 a.m. were determined .

Ankamall Türk Traktör Fab. Real

Ankamall

Initial Results of the Research: AnkaMall
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Features of the climate and vehicle traffic
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elevation of the area is lower than other locations of the city, highways go by



Features related to energy
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During the heating and cooling process of a huge shopping center, a great amount of energy is given outside
The area is a valley base. For this reason, CO2 accumulation is the highest in this location . almost no tree present in the area



Geographical features
–



Morphological features
–

Initial Results of the Research: AnkaMall


Structural features
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outer surfaces of the building are covered with reflecting and heat absorbing hard material, parked vehicles emit heat to their surroundings like an oven



Features about the usage of the area
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A large parking lot, and a large and closed shopping center create enough reasons for an increase in temperature .
LPGs that have not gone through an inspection navigate on the streets vehicles navigate in the city without exhaust emission audits It is the most suitable direction to be protected from the cold winds during winter



Features of fuel used in transportation
– –



Features about the orientation of the buildings
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Turk Tractor Factory

Turk Tractor Factory
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

Climate features and vehicle traffic
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It is located on a valley base. CO2 accumulation is high operates three shifts, high levels of energy is consumed it is not possible to remove the polluted air and the water vapour with the air current

Features about energy
–



Geographical features
–



Morphological features
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nearly no greenery in the area. A large area is paved with concrete in order to park the tractors .

Turk Tractor Factory
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Structural features
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roof of the factory covering an area about 100.000 m2 is covered with metal materials. It emits heat to its surroundings.
The issue to be discussed here is the establishment of such a factory in one of the green and forest areas of Ankara .
No fuel effect It is not possible to make an evaluation of the island on this point .

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Other features about the usage of the area
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Features of fuel
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Features about the orientation of the island
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RESULT
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The research has not been concluded yet. However, it is seen that the temperature rise caused by the parking of the vehicles is more effective than the temperature rise caused by the vehicle traffic. It can be said that all the streets in Ankara are like ovens due to the parked cars. Facades of the buildings and roofs are clear to be heat keepers It is understood that researches about the “urban heat islands” will contribute much to the city planning studies.


				
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posted:12/18/2009
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