Introduction
The province of Yazd are is located in the central part of Iranian plateau at 29.52 to 33.27 latitude and 52.55 to 56.37 longitude. Yazd province consists of 10 townships, 21 cities, 19 districts and 51 villages. The neighboring provinces to Yazd are Isfahan, Pars, Khorasan and Kerman provinces. There is variety of up and down areas in this province with altitude of 850m. to 4055m. [Shirkooh).

The annual rainfall is between 50 to 100 mm. changes of temperature are too much in winter and summer, even day and night, between +45 to -20°C. This average is changeable from 11.9 up to 20.7°C. Yazd province limits are located in a part of the central Iranian plateau, where most of Iranian deserts are located in. Different deserts cover an extensive area of the province. The population of the province is about 814000.