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- W2971531166 abstract "Iran has a predominantly arid and semi-arid climate where the drought hazards and their variability are the crucial concerns for water resources management. This study assesses the characteristics and trends of meteorological droughts features in different climate regions of Iran. Monthly rainfall data are analysed using Standardized Precipitation Index (SPI) to reconstruct meteorological droughts for different time steps (1, 3, 6, 9 and 12). The drought events are decomposed into three features, namely Severity (S), Duration (D) and Peak (P) to assess their spatial variations in different climate regions. The Mann–Kendall (MK) test is used to detect the trends in drought features in different climate regions. The percentage area (PA) of increasing/decreasing trend in drought features is computed to assess the spatial variations of trends in each region. Besides, SPI is compared with Standardized Precipitation Evapotranspiration Index (SPEI) to understand the importance of evapotranspiration on meteorological droughts. The high correlations between SPI and SPEI indicate that the results obtained using SPI would not vary if a similar analysis is conducted using SPEI. The results obtained using SPI reveal that short-duration droughts (6 months or less) are more frequent and severe in the northwest and the north along the Caspian plains while the longer-duration droughts (more than 6 months) are more frequent and severe in the south, southeast and southwest. Overall, the northwest region of Iran is found most susceptible to droughts in terms of S, P and D. Moderate (40% 60%) increase in the drought features are observed in all climate regions for shorter SPI (3 months or less) except northwest, while no drought feature is found to increase significantly for SPI-12. Overall, the higher increase in drought S, P and D are found in the central arid region and at higher altitudes." @default.
- W2971531166 created "2019-09-12" @default.
- W2971531166 creator A5000307425 @default.
- W2971531166 creator A5047150854 @default.
- W2971531166 creator A5055663395 @default.
- W2971531166 date "2019-10-07" @default.
- W2971531166 modified "2023-10-04" @default.
- W2971531166 title "Spatial assessment of meteorological drought features over different climate regions in Iran" @default.
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- W2971531166 doi "https://doi.org/10.1002/joc.6307" @default.
- W2971531166 hasPublicationYear "2019" @default.
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