干旱区生态环境知识资源中心(Arid): Comparative evaluation of meteorological and hydrological drought using stationary and non-stationary indices in a semi-arid river basin in India

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DOI	10.1007/s11069-024-06739-2
	Comparative evaluation of meteorological and hydrological drought using stationary and non-stationary indices in a semi-arid river basin in India
	Sajeev, Arya; Kundapura, Subrahmanya
通讯作者	Sajeev, A
来源期刊	NATURAL HAZARDS
ISSN	0921-030X
EISSN	1573-0840
出版年	2024
英文摘要	Few researchers have incorporated climate change in drought indices calculations and conducted comparative analyses of meteorological and hydrological droughts using non-stationary indices. The primary objective of this research is to develop non-stationary indices for assessing meteorological and hydrological droughts in the Shetrunji River basin in India. The climate oscillations are used as covariates to create non-stationary models by applying the generalized additive model in location, scale, and shape from 1971 to 2015. The statistical performance of stationary and non-stationary models has been compared across various time scales (3-, 6-, 12- and 24-months), and the results indicate that non-stationary models more effectively capture meteorological and hydrological drought events than stationary models. The drought and flood events detected by non-stationary indices are compared with historical episodes to assess the robustness of the indices. The results are also compared with drought events obtained from rainfall and streamflow departures. The annual and seasonal departures in rainfall and streamflow show the highest deficiency of rainfall and streamflow in 1987. The probability of different drought classes is calculated, and a higher likelihood of severe to extreme dry conditions is observed compared to very wet and extreme wet conditions in the basin. Investigation has been conducted on the impact of meteorological drought on hydrological drought and a correlation analysis between both types of drought. A significant correlation is observed between meteorological and hydrological drought at all analyzed time scales. Meteorological drought impacts surface water resources with a one-month lag at all time scales, with the highest response rate obtained at 6-month scale (91.13%). The study also examines the impact of drought on yield loss in kharif (bajra) and rabi (wheat) crops. Bajra and wheat yield loss rates strongly correlate with non-stationary drought indices, with a more significant effect of drought on bajra yield than wheat during major drought events. This novel dimension of drought studies provides practical insights into semi-arid regions in a changing environment. The findings can be utilized by various sectors, including drought management, agricultural planners, and policymakers, to reduce crop loss due to drought.
英文关键词	Standardized precipitation index (SPI) Non-stationary drought index Drought Hydrological drought Crop yield GAMLSS
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001259400200001
WOS关键词	NORTH-ATLANTIC OSCILLATION ; STANDARDIZED PRECIPITATION INDEX ; LARGE-SCALE CLIMATE ; AGRICULTURAL DROUGHT ; ARCTIC OSCILLATION ; RAINFALL INTENSITY ; MONSOON RAINFALL ; SPATIAL-PATTERNS ; VARIABILITY ; IMPACT
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/2XILL650/404959
推荐引用方式 GB/T 7714	Sajeev, Arya,Kundapura, Subrahmanya. Comparative evaluation of meteorological and hydrological drought using stationary and non-stationary indices in a semi-arid river basin in India[J],2024.
APA	Sajeev, Arya,&Kundapura, Subrahmanya.(2024).Comparative evaluation of meteorological and hydrological drought using stationary and non-stationary indices in a semi-arid river basin in India.NATURAL HAZARDS.
MLA	Sajeev, Arya,et al."Comparative evaluation of meteorological and hydrological drought using stationary and non-stationary indices in a semi-arid river basin in India".NATURAL HAZARDS (2024).