Document Type : Research Paper
Authors
1 Member of Faculty at Islamic Azad University of Meybod
2 Member of Faculty at Islamic Azad University, CEO of Yazd Province Meteorology
Abstract
Since drought is a very complicated phenomenon, it is very difficult to understand all aspects of this phenomenon and all the problems arising from it. On this basis, there is still no comprehensive definition or a single type of examination of drought unanimously accepted by experts in the field. In this study, drought trend of Yazd province was examined in terms of frequency of dry and rainy months using standard deviation index (compared to the monthly average rainfall) during a statistical period of 30 years in 26 stations, and it was shown that in the Abarkuh, , Dehshir, Khuyrak, Saghand and Mazra’e-no stations 54% of the time examined was without rain, and in the Abarkuh, , Dehshir, Khuyrak, Saghand and Yazd stations in almost 77% of the statistical period the precipitation was less than the normal monthly precipitation.
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