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Twentieth Century Rainfall Trends of Uttarakhand, India: A SpatioTemporal

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Title Twentieth Century Rainfall Trends of Uttarakhand, India: A SpatioTemporal
Not Available
 
Creator Nurnabi Meherul Alam
Chayna Jana
Dhananjay Barman
Bhavika Sharma
Deepak Singh
Prasanta Kumar Mishra
Narinder Kumar Sharma
 
Subject Change point analysis, Mann–Kendall test, Pettitt test, Rainfall trend analysis, Sen’s slope, Twentieth century, Uttarakhand, Wavelet analysis
 
Description Not Available
Rainfall is a prime input of the hydrological cycle
and therefore its variability analysis plays a key role in
designing of engineering structures and crop planning. The
increase in uncertainty of rainfall events may affects the
water resources which lead to decrease the production in
agricultural sector especially in hill region like Uttarakhand.
The present study was based on spatio-temporal analysis
of rainfall variation in the state of Uttarakhand, India over
the 20th century (1901–2000). Sen’s slope and Mann–
Kendall statistics were used to test the trend in annual and
seasonal rainfall pattern, and the maximum decrease in
monsoon rainfall was observed in Champawat district (2.16
mm year-1) followed by Bageswar (1.82 mm year-1), and
Pithoragarh (1.80 mm year-1). Rainfall in winter and postmonsoon
seasons also decreased in all the districts but the
changesobserved were not significant (p>0.05). Pettitt’s
testwas employed to know the most probable change year
forseasonal and annual rainfall trend. After
1986, asignificant declining trend over the year was observed in
annual, post-monsoon and monsoon rainfall showed at the
probability levels of 0.052, 0.085 and 0.059, respectively.
Whereas, after 1964, a declining trend during winter rainfall
Was observed but the change was found to be nonsignificant
(p= 0.452). To know the periodicity of rainfall
pattern, Wavelet analysis was done and observed an
increasing frequency of annual and monsoon extreme rainfall
events with stronger periodicity of 2–8 years in the recent
decades.These findings will be helpful for the policy makers
for optimal water allocation and also for making scientific
managementstrategies for constructions of engineering
structures, utilization of rain water for agriculture such as
land preparation and sowing, and other uses.
Not Available
 
Date 2020-06-15T11:02:31Z
2020-06-15T11:02:31Z
2018-10-01
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/37134
 
Language English
 
Relation Not Available;
 
Publisher Not Available