气候变化领域集成服务门户(CCPortal): Evaluation of time scale of meteorological, hydrological and agricultural drought indices

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DOI	10.1007/s11069-021-04827-1
	Evaluation of time scale of meteorological, hydrological and agricultural drought indices
	Prajapati V.K.; Khanna M.; Singh M.; Kaur R.; Sahoo R.N.; Singh D.K.
发表日期	2021
ISSN	0921030X
英文摘要	The present study was carried out to characterize drought in the Marathwada region of Maharashtra, which experiences recurring droughts, through meteorological, hydrological and agricultural drought indices, namely the Standardized Precipitation Index (SPI), Streamflow Drought Index (SDI) and Vegetation Condition Index (VCI), respectively. Standardized Precipitation Index (SPI) and Streamflow Drought Index (SDI) were computed at 1, 3, 6, 9 and 12-month time scales using in situ precipitation and streamflow data, respectively, for 35 years (1980–2014). The VCI was computed using MODIS satellite data at 500 m resolution for 1, 3 and 5-month time scales for 15 years (2000–2014). The time scales of drought indices were evaluated using historical drought years and foodgrain production. The drought area observed by SPI, SDI and VCI at different time scales was correlated with foodgrain production during kharif season for 15 years (2000–2014). The correlation analysis indicated a significant correlation between foodgrain production and 3-month SPI (r = − 0.724) and 5-month VCI (r = − 0.811), respectively, however, a low correlation was observed between multiscale SDI and foodgrain production. 3-month SPI and 5-month VCI were found to be more appropriate time scales to observe meteorological and agricultural droughts, respectively, in the region; while none of the SDI’s time scales could capture hydrological drought. The analysis also revealed that the magnitude of meteorological (observed by 3-month SPI) and agricultural (observed by 5-month VCI) droughts mimic the quantum of loss in foodgrain production very closely. However, the severity and the areal extent of droughts observed by these indices were varied both spatially and temporally. Thus, the present study concluded that a single indicator (i.e., meteorological, hydrological or agricultural) is not sufficient to capture the actual drought situation, thereby suggesting the use of multiple indicators-based approaches for realistic drought characterization and monitoring. © 2021, The Author(s), under exclusive licence to Springer Nature B.V.
关键词	Drought Maharashtra Marathwada Standardized Precipitation Index (SPI)Streamflow Drought Index (SDI)Vegetation Condition Index (VCI)
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/206501
作者单位	Water Technology Centre, ICAR-Indian Agricultural Research Institute, New Delhi, 110012, India; Division of Agricultural Physics, ICAR-Indian Agricultural Research Institute, New Delhi, 110012, India
推荐引用方式 GB/T 7714	Prajapati V.K.,Khanna M.,Singh M.,et al. Evaluation of time scale of meteorological, hydrological and agricultural drought indices[J],2021.
APA	Prajapati V.K.,Khanna M.,Singh M.,Kaur R.,Sahoo R.N.,&Singh D.K..(2021).Evaluation of time scale of meteorological, hydrological and agricultural drought indices.Natural Hazards.
MLA	Prajapati V.K.,et al."Evaluation of time scale of meteorological, hydrological and agricultural drought indices".Natural Hazards (2021).