气候变化领域集成服务门户(CCPortal): Regionalization of drought severity

CCPortal

DOI	10.1007/s11069-020-04103-8
	Regionalization of drought severity–duration index across Iran
	Ghadami M.; Raziei T.; Amini M.; Modarres R.
发表日期	2020
ISSN	0921030X
起始页码	2813
结束页码	2827
卷号	103 期号:3
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. © 2020, Springer Nature B.V.
关键词	Drought severity Iran L-moments Regional drought frequency analysis Risk SPI
英文关键词	agricultural production; annual variation; drought; extreme event; precipitation assessment; regionalization; socioeconomic conditions; socioeconomic status; Iran
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/205703
作者单位	Department of Natural Resources, Isfahan University of Technology, Isfahan, Iran; Soil Conservation and Watershed Management Research Institute (SCWMRI), Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran
推荐引用方式 GB/T 7714	Ghadami M.,Raziei T.,Amini M.,等. Regionalization of drought severity–duration index across Iran[J],2020,103(3).
APA	Ghadami M.,Raziei T.,Amini M.,&Modarres R..(2020).Regionalization of drought severity–duration index across Iran.Natural Hazards,103(3).
MLA	Ghadami M.,et al."Regionalization of drought severity–duration index across Iran".Natural Hazards 103.3(2020).