Abstract
Increasing The Population In Large Cities , Has Many Environmental Consequences. One Of The Problems , Is Air Temperature Increase Of Cities (Creation Of Heat Islands) Compared To Surrounding Rural Areas And Emerging Hot Cities Universally. Increasing The Temperature In Urban Areas And Appearance Of Hot Cities Around The World, Has Negative Effects Such As Increase In Energy Consumption, Disorder In Human Health, And Hygiene Problems . One Of Prominent Factors That Cause Increase In Air Temperature, Is Population Density And Building Density. Nowadays The Necessity Of Attention To Density In Hot Cities Due To Increasing Population , Lack Of Land, As Common Issue, Beside Future Of Hot Cities, Is Seen As A Urgency. Increases In Amount Of Building Density And Then Increasing The Number Of Floors, Due To The Increase In Area And Material Of External Body Of Building And Absorb And Reflect More Sun Exposure(Rather Than The Building With Low Building Density) Through The Body Of The Building, Cause Increase In Temperature Inside And Outside The Buildings. On The Other Hand, Population Density Would Cause Increases Of Energy Consumption And Lift Of Air Temperature In Surrounding Area In Future Of Hot Cities.. Purpose Of This Study Is To Investigate The Mean Changes Befall Around Air Temperature Of Region 22 Of Tehran Municipality, During The Last 30 Years, And Recognize Correlation Between Density Changes And Air Temperature Changes. This Study Has Two Main Hypothesis : 1- Changes In Population Density Would Causes Changes In Air Temperature. 2- Changes In Building Density Causes Changes In Air Temperature. This Study Is Applicable With Respect To Its Purpose And Use Quantitative Methods For Its Methodology. First, Amount Of Changes Of Population Density , Building Density And Air Temperature, During The Last Three Decades Have Been Evaluated. Then The Effect Of Two Independent Variables (Population Density And Building Density) On Dependent Variable (Air Temperature) Have Been Evaluated By Using SPSS 22 Software According To The Statistical Method Of One Variable Regression. And Correlation Between Density And Air Temperature Have Been Considered. Finding Of This Study Shows That Increase In Building Density And Population, Has Had Significant Positive Influence On Increase Of Air Temperature Of Region 22 Of Tehran Municipality During The Last 30 Years. Lastly, Attention To Design Issues And Issues Of Density Would Cause Reduction Of Temperature And Reduction Of The Consequences Of Rising Temperature.
