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Spatio-temporal rainfall trends in twentieth century for Bundelkhand region, India

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Title Spatio-temporal rainfall trends in twentieth century for Bundelkhand region, India
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Creator C. Jana, N. M. Alam, D. Mandal, M. Shamim and Rajesh Kaushal
 
Subject 20th century, PCE, Pettitt’s test, rainfall analysis, SI, wavelet analysis
 
Description Not Available
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.
Not Available
 
Date 2019-12-04T06:19:10Z
2019-12-04T06:19:10Z
2017-01-01
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/27008
 
Language English
 
Relation Not Available;
 
Publisher IWA