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The purpose of this study is analyzing the trend of drought characteristics in Hamedan Province In this regard, the corrected standardized precipitation index (SPI mod ) was calculated based on the monthly precipitation data from synoptic and rain gauge stations during the period of . Drought characteristics, including severity, duration and interarrival time were defined and extracted based on the SPI mod . The Sen’s estimator was used to estimate the slopes of trend lines. The results show that in most of the stations, drought duration had a nonsignificant decreasing trend, while the drought severity in over half of the stations had a nonsignificant decreasing trend. The drought interarrival time witnessed a non-significant decreasing trend in all of the stations, except at the Varayeneh station, which experienced a significant increasing trend at . The monthly rainfall experienced a non-significant increasing trend in most of the stations except Keyto which experienced a non-significant decreasing trend.

"Technical Report" Trend Analysis of Meteorological Drought Characteristics in Hamedan Province