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DOI	10.1061/(ASCE)IR.1943-4774.0001536
	Bivariate Drought Characterization of Two Contrasting Climatic Regions in India Using Copula
	Sajeev, Arya; Barma, S. Deb; Mahesha, Amai; Shiau, Jenq-Tzong
通讯作者	Barma, SD (corresponding author), Natl Inst Technol Karnataka, Dept Water Resources & Ocean Engn, Mangalore 575025, Karnataka, India.
来源期刊	JOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING
ISSN	0733-9437
EISSN	1943-4774
出版年	2021
卷号	147 期号:3
英文摘要	This study aims to construct the multiple time-scale joint distributions of drought duration and severity using two-dimensional copulas and compare the drought characteristics in India's two contrasting climate regions: the arid Rajasthan and humid, tropical Kerala. The drought occurrences were defined by the standardized precipitation index (SPI) with a threshold below -0.8 at time scales of 3, 6, 12, and 24 months for 1900-2016. Significant correlations were noted between the drought severity and drought duration in both regions. The Clayton copula gave a better fit than other copulas for modeling the dependence among the observed drought duration and severity. The results indicate that the probability of short-term droughts (SPI-3 and SPI-6) is more significant than those of long-term droughts (SPI-12 and SPI-24) for an identical drought event in both regions. Also, the probability of severe drought events with greater duration and severity for long-term droughts (SPI-12 and SPI-24) is higher in Kerala than that in western Rajasthan. For all the time-scale SPIs, the conditional probability of drought severity for a given duration exceeding a threshold showed an increasing trend in both regions. Furthermore, the conditional probability of the drought duration given the severity for short-term droughts is greater than that of the long-term droughts for the same drought event. For short-term droughts, the conditional return period of an identical drought event is lower in Kerala than in western Rajasthan. In contrast, the conditional return period of long-term droughts is lower in western Rajasthan. Additionally, copula-based nonexceedance conditional distributions for the major crops were established based on rainfall.
英文关键词	Bivariate distribution Copula Crop productivity Drought Precipitation Return period Standardized precipitation index (SPI)
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000653750200001
WOS关键词	FLOOD FREQUENCY-ANALYSIS ; WESTERN RAJASTHAN ; SEVERITY ; IRRIGATION ; DERIVATION ; DURATION ; RAINFALL ; ENTROPY ; IMPACT ; INDICATORS
WOS类目	Agricultural Engineering ; Engineering, Civil ; Water Resources
WOS研究方向	Agriculture ; Engineering ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368953
作者单位	[Sajeev, Arya; Barma, S. Deb; Mahesha, Amai] Natl Inst Technol Karnataka, Dept Water Resources & Ocean Engn, Mangalore 575025, Karnataka, India; [Shiau, Jenq-Tzong] Natl Cheng Kung Univ, Dept Hydraul & Ocean Engn, Tainan 701, Taiwan
推荐引用方式 GB/T 7714	Sajeev, Arya,Barma, S. Deb,Mahesha, Amai,et al. Bivariate Drought Characterization of Two Contrasting Climatic Regions in India Using Copula[J],2021,147(3).
APA	Sajeev, Arya,Barma, S. Deb,Mahesha, Amai,&Shiau, Jenq-Tzong.(2021).Bivariate Drought Characterization of Two Contrasting Climatic Regions in India Using Copula.JOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING,147(3).
MLA	Sajeev, Arya,et al."Bivariate Drought Characterization of Two Contrasting Climatic Regions in India Using Copula".JOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING 147.3(2021).