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DOI	10.1007/s12665-021-09868-0
	Spatial analysis of meteorological and hydrological drought characteristics using Copula model
	Dehghannik, Maryam; Kavianpour, Mohammad Reza; Moazami, Saber
通讯作者	Dehghannik, M (corresponding author), KN Toosi Univ Technol, Dept Civil Engn, Tehran, Iran.
来源期刊	ENVIRONMENTAL EARTH SCIENCES
ISSN	1866-6280
EISSN	1866-6299
出版年	2021
卷号	80 期号:24
英文摘要	Drought as a reversible climate phenomenon is an inevitable fact, especially in arid and semiarid areas. Therefore, predicting drought is important to deal with and mitigate its effects. Hydrological drought with its direct effect on water resources is the most important type of drought. It is caused by the lack of surface water flow and river discharge reduction. To measure its characteristics (magnitude and duration), Stream Flow Index (SDI) has been used. However, to predict hydrological drought, it is essential to understand its relationship with meteorological drought, which is described by the Standardized Precipitation Index (SPI). In this study, monthly rainfall and discharge data of Karoon and Maroon Basins in Iran from 1973 to 2014 were collected and used to calculate SDI and SPI indicators. Based on Run theory, drought characteristics, including drought duration and its magnitude, were obtained. In order to have a more reliable analysis of hydrological drought, which is a consequence of meteorological drought, the most suitable relationship between meteorological and hydrological drought characteristics was investigated. A significant relationship between meteorological and hydrological droughts was concluded by regression analysis; on average, the quadratic function showed the best performance. Based on the results, hydrological droughts occur on average at a 7-month interval from meteorological drought. Finally, spatial analysis of drought characteristics (duration and magnitude) was determined and performed by multivariate Copula functions.
英文关键词	Copula functions Hydrological drought Meteorological drought SDI SPI
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000723002500011
WOS关键词	FREQUENCY-ANALYSIS ; BASIN
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/374060
作者单位	[Dehghannik, Maryam] KN Toosi Univ Technol, Dept Civil Engn, Tehran, Iran; [Kavianpour, Mohammad Reza] KN Toosi Univ Technol, Fac Civil Engn, Tehran, Iran; [Moazami, Saber] Western Univ, Dept Civil & Environm Engn, Spencer Engn Bldg, London, ON, Canada
推荐引用方式 GB/T 7714	Dehghannik, Maryam,Kavianpour, Mohammad Reza,Moazami, Saber. Spatial analysis of meteorological and hydrological drought characteristics using Copula model[J],2021,80(24).
APA	Dehghannik, Maryam,Kavianpour, Mohammad Reza,&Moazami, Saber.(2021).Spatial analysis of meteorological and hydrological drought characteristics using Copula model.ENVIRONMENTAL EARTH SCIENCES,80(24).
MLA	Dehghannik, Maryam,et al."Spatial analysis of meteorological and hydrological drought characteristics using Copula model".ENVIRONMENTAL EARTH SCIENCES 80.24(2021).