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DOI	10.1007/s11069-020-04103-8
	Regionalization of drought severity-duration index across Iran
	Ghadami, Mohammad 1; Raziei, Tayeb 2; Amini, Mohsen 1; Modarres, Reza 1
通讯作者	Modarres, Reza
来源期刊	NATURAL HAZARDS
ISSN	0921-030X
EISSN	1573-0840
出版年	2020
卷号	103 期号:3 页码:2813-2827
英文摘要	Drought is the most important threat to both environmental and socio-economic features of the arid and semi-arid regions of the world as it is closely associated with agricultural production losses, water supply shortage, and security. This study aims to regionalize extreme drought severity-duration (SD) index probability across Iran. The 12-month Standardized Precipitation Index (SPI) time series were calculated for the studied stations and subsequently used to compute the annual extreme SD index. Applying a cluster analysis (CA) to the stations, SD index, the studied area was classified into four regions and their homogeneity was tested by the L-moment approach. Results indicated that the regions identified are homogeneous. Based on the L-moment ratio diagram the 2-parameter log-normal distribution was selected as the regional statistical distribution for all regions identified, by which the regional drought SD associated with different return periods was estimated. The spatial pattern of computed drought SD indicates that the eastern, northwestern and western parts of the country are exposed to very high drought severity in all return periods. As the return period is increasing, very high and severe droughts dominate larger areas, so that, for long return periods, approximately all the country would turn towards extreme and severe drought events even across regions possessing high annual precipitation amount.
英文关键词	Regional drought frequency analysis Drought severity L-moments SPI Risk Iran
类型	Article
语种	英语
国家	Iran
收录类别	SCI-E
WOS记录号	WOS:000539771600001
WOS关键词	FREQUENCY-ANALYSIS ; VARIABILITY ; SPI ; TRENDS
WOS类目	Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences ; Water Resources
WOS研究方向	Geology ; Meteorology & Atmospheric Sciences ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319317
作者单位	1.Isfahan Univ Technol, Dept Nat Resources, Esfahan, Iran; 2.Agr Res Educ & Extens Org AREEO, Soil Conservat & Watershed Management Res Inst SC, Tehran, Iran
推荐引用方式 GB/T 7714	Ghadami, Mohammad,Raziei, Tayeb,Amini, Mohsen,et al. Regionalization of drought severity-duration index across Iran[J],2020,103(3):2813-2827.
APA	Ghadami, Mohammad,Raziei, Tayeb,Amini, Mohsen,&Modarres, Reza.(2020).Regionalization of drought severity-duration index across Iran.NATURAL HAZARDS,103(3),2813-2827.
MLA	Ghadami, Mohammad,et al."Regionalization of drought severity-duration index across Iran".NATURAL HAZARDS 103.3(2020):2813-2827.