In this paper, using the wavelet technique we analysed rainfall behaviour in the country across different agro-climatic zones over a century. Findings indicate that at the national level there is no significant trend in rainfall in the long run, but there are pockets of change in the rainfall pattern. There was a significant increase in the rainfall in the arid zone, whereas in the humid, semi-arid tropics and semi-arid temperate zones the trend was downward but insignificant. The behaviour of rainfall was different during this period. Except in the arid zone, we find a similar trend in other zones – increasing initially, tapering off in the middle and then declining but with some difference in time intervals. In the arid zone, the behaviour of rainfall had been erratic. In the short run, the direction of change in trend remains the same as in the long run but the change is statistically significant.
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Research Article|
November 04 2015
Investigating rainfall trend over India using the wavelet technique
Ranjit Kumar Paul;
1ICAR – Indian Agricultural Statistics Research Institute, New Delhi 110012, India
E-mail: [email protected]
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P. S. Birthal
P. S. Birthal
2ICAR – National Institute of Agricultural Economics and Policy Research, New Delhi 110012, India
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Journal of Water and Climate Change (2016) 7 (2): 353–364.
Article history
Received:
June 01 2015
Accepted:
September 24 2015
Citation
Ranjit Kumar Paul, P. S. Birthal; Investigating rainfall trend over India using the wavelet technique. Journal of Water and Climate Change 1 June 2016; 7 (2): 353–364. doi: https://doi.org/10.2166/wcc.2015.079
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