DOI: 10.1007/s11069-020-04103-8
论文题名: Regionalization of drought severity–duration index across Iran
作者: Ghadami M. ; Raziei T. ; Amini M. ; Modarres R.
刊名: Natural Hazards
ISSN: 0921030X
出版年: 2020
卷: 103, 期: 3 起始页码: 2813
结束页码: 2827
语种: 英语
中文关键词: 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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/168502
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
Ghadami M.,Raziei T.,Amini M.,et al. Regionalization of drought severity–duration index across Iran[J]. Natural Hazards,2020-01-01,103(3)