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DOI	10.2166/wcc.2017.120
	Spatio-temporal rainfall trends in the twentieth century for Bundelkhand region; India
	Jana C.; Alam N.M.; Mandal D.; Shamim M.; Kaushal R.
发表日期	2017
ISSN	20402244
起始页码	441
结束页码	455
卷号	8 期号:3
英文摘要	Globally, climate change and extreme weather events are occurring more frequently, impacting water resources and farming systems. Therefore, spatio-temporal analysis of long-term rainfall is much needed to understand the variability of rainfall occurrence. The present study attempts to analyse spatio-temporal rainfall change scenarios in the 20th century (1901-2000) over Bundelkhand, one of the drought hit regions of India. Analysis shows that major rainfall contributed from 3 months, i.e. July, August and September. However, decreasing rainfall trend during monsoon season and increasing trend during pre-monsoon and post-monsoon season indicates the scenario of shifting rainfall from normal occurrence. This result is supported by decreasing seasonality index (SI) (1.94-1.1). The northern part of the region witnessed positive annual and monsoon rainfall trend but the southern part observed negative trend. Pettitt’s test indicates 1983 is the most probable change year with 0.95 probability, after which annual and monsoon rainfall was found decreasing. Wavelet analysis revealed that extreme rainfall occurrence was observed with a periodicity of 2-16 years. However, Bundelkhand rainfall pattern depicts declining rainfall trends, heading towards a further drier phase with more irregular rainfall in the coming era. The study will serve as future reference in similar regions in the world to determine vital weather patterns which may impact farming systems. © IWA Publishing 2017.
英文关键词	20th century; PCE; Pettitt’s test; Rainfall analysis; SI; Wavelet analysis
语种	英语
scopus关键词	Atmospheric thermodynamics; Climate change; Silicon; Water resources; Wavelet analysis; 20th century; Declining rainfall; Extreme weather events; Rainfall analysis; Rainfall patterns; Seasonality index; Spatiotemporal analysis; Twentieth century; Rain; climate change; drought; long-term change; rainfall; seasonality; spatiotemporal analysis; trend analysis; twentieth century; wavelet analysis; Bundelkhand; India
来源期刊	Journal of Water and Climate Change
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/148087
作者单位	ICAR-Indian Institute of Soil and Water, Conservation, Dehradun, Uttarakhand, India; ICAR-Indian Institute of Farming System Research, Modipuram, Uttar Pradesh, India
推荐引用方式 GB/T 7714	Jana C.,Alam N.M.,Mandal D.,et al. Spatio-temporal rainfall trends in the twentieth century for Bundelkhand region; India[J],2017,8(3).
APA	Jana C.,Alam N.M.,Mandal D.,Shamim M.,&Kaushal R..(2017).Spatio-temporal rainfall trends in the twentieth century for Bundelkhand region; India.Journal of Water and Climate Change,8(3).
MLA	Jana C.,et al."Spatio-temporal rainfall trends in the twentieth century for Bundelkhand region; India".Journal of Water and Climate Change 8.3(2017).