The survey of climatic drought trend in Iran |
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| Authors: | Hossein Bari Abarghouei Mohammad Amin Asadi Zarch Mohammad Taghi Dastorani Mohammad Reza Kousari Mehdi Safari Zarch |
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| Institution: | (1) Department of Agriculture, Payame Noor University, Yazd, Iran;(2) Faculty of Natural Resources, Yazd University, Yazd, Iran;(3) Faculty of Natural Resources, Yazd University, Yazd, Iran;(4) Management Center for Strategic Projects, Fars Organization Center of Jahad Agriculture, Shiraz, Iran; |
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| Abstract: | Drought is one of the most important natural hazards in Iran. Therefore, drought monitoring has become a point of concern
for most of the researchers. In the present study, the changes and trend of drought was surveyed, under the current global
climate changes, by non parametric Mann–Kendall statistical test for 42 synoptic stations at different places of Iran. Standardized
Precipitation Index (SPI) was calculated to recognize the drought condition at different time scales (3, 6, 9, 12, 18 and
24 months’ time series) for analyzing the drought trend in the recent 30 years. The obtained results have indicated a significant
negative trend of drought in many parts of Iran, especially the South-East, West and South-West regions of the country. According
to the results, although some parts of Iran such as North (around the Caspian Sea) and Northeast show no significant trend
but in other parts of country, the severity of drought has increased during the last 30 years. |
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