Paper Information

Journal:   GEOGRAPHY AND ENVIRONMENTAL HAZARDS   FALL 2013 , Volume 2 , Number 7; Page(s) 21 To 22.
 
Paper: 

ANALYSIS OF THE CO POLLUTANT IN THE PATH OF AZADI SQUARE - TEHRANPARS BYENVI-MET MODEL AT SUMMER

 
 
Author(s):  SHAMSIPOUR ALIAKBAR*, AMINI JVAN
 
* DEPARTMENT OF PHYSICAL GEOGRAPHY, UNIVERSITY OF TEHRAN, TEHRAN, IRAN
 
Abstract: 

Introduction: Air pollution caused by changes in the quantity and quality of atmospheric gases. This phenomenon is due to the increased use of fossil fuels in urban areas. Status of natural environment of the city and the characteristics of the weather elements and phenomena cause congestion, transport and displacement of pollutants, particularly in the central areas of a city. Tehran have Known as a one of the largest city in the world by population. It usually meets critical air quality condition special in central part of the city. In this context, for careful analysis of the physical and natural factors in mitigation or aggravation of air pollution, the micro-scale numerical modeling methods based on a laboratory model of airflow (CFDs) are used. The usefulness of this method is being the quantitative effect of each of the urban fabric and climatic factors in small-scale on spatial and temporal resolution. However, this method can be largely resolves this problem.To evaluate the effects of urban spaces on air pollution in micro-scale, the components such as street width and orientation, mass-produced building model, land use, and green space patterns and classes against atmospheric elements including local prevailing wind direction and intensity, temperature and humidity fluctuations have been discussed. In spite of the fact that numerical modeling can offset most part of micro-scale data deficiencies.

 
Keyword(s): AIR POLLUTION, CARBON MONOXIDE, MICRO, SCALE MODELING, ENVI, MET
 
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