Abstract

Detailed studies on the effect of urbanization and industrialization processes on outdoor thermal human com- fort in Greater Cairo region, Egypt have been performed in this study. Four different districts in Greater Cairo region have been selected to represent rural, suburban, typical urban and industrial areas. The data of surface dry, wet bulb temperatures and wind speed for two different periods represent non-urbanized and urbanized periods have been used. Discomfort indices for the two periods have been calculated for the four districts. The study revealed that urbanization and industrialization processes have resulted in the distinctly modification of human comfortable at all districts. The feeling of quite comfortable reduced from the old non-urbanized period to the recent urbanized period at the four districts. During the recent urbanized period, the rural area has the highest total number of quite comfortable hours while both urban and industrial areas have the lowest total number of hours. The serious hot uncomfortable didn’t occur at all districts during the old non-urbanized period while during the recent urbanized period, all people had felt extreme serious hot uncomfortable only at urban and industrial areas. It could be concluded that the urbanization and industriali-zation processes cause increase of human serious hot uncomfortable feeling which in turn leads to more hin-dering for the human activities while the rural conditions leads to optimum weather comfort for further and more human activities.

Highlights

  • Whether discomfort is caused by either one of the factors depend on the climatic conditions

  • Detailed studies on the effect of urbanization and industrialization processes on outdoor thermal human comfort in Greater Cairo region, Egypt have been performed in this study

  • It could be concluded that the urbanization and industrialization processes cause increase of human serious hot uncomfortable feeling which in turn leads to more hindering for the human activities while the rural conditions leads to optimum weather comfort for further and more human activities

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Summary

Introduction

Whether discomfort is caused by either one of the factors depend on the climatic conditions. The thermal sensation of heat discomfort is experienced under "steady state” conditions, when the average skin temperature is elevated above the level corresponding to the state of comfort. Under sedentary activity, it is about 32 - 33 ̊C. The main environmental conditions, which affect the thermal sensation of heat, are the air and radiant temperatures, and the air velocity over the body. The lower limit is attained when the skin is completely dry and the upper limit is considered when the whole body and clothing are soaked with sweat Between these two limits there are intermediate levels, which can be defined quite clearly [15]

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