Analysis of Intensity, Duration and Frequency of Climatic Droughts in Yazd Province

Droughts are one of the most common climate changes that surround many arid and semi-arid regions of the world with high intensity every few years. Based on previous studies, the SPI index is one of the most widely used indices for surveying. Meteorological droughts in the world and in Iran. It is also a critical drought that has greatly affected the arid areas, especially the Yazd province. In this research, the characteristics of drought phenomenon such as intensity and continuity at the province level were determined and analyzed. The results of drought severity analysis in Yazd province indicate that the most severe droughts occurred in the year 1998-1999. The results show that the highest drought persistence for 8 years is related to Yazd (stations of Yazd P centers of and Mohammad Abad) and then Bafgh city with duration of 7 years (stations of Qotomr, Koushk). The most frequent drought persistence in the province was 2 and 3 years old