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Trends in the annual extreme rainfall events of 1 to 3 days duration over India

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Summary

In this paper, the annual extreme rainfall series in the time scale of 1 to 3 days duration at 316 stations, well distributed over the Indian region, covering 80-years of rainfall data from 1901 to 1980 were analysed for trend and persistence using standard statistical tests. It has been found that the annual extreme rainfall records of most stations are free from trend and persistence. However, the extreme rainfall series at stations over the west coast north of 12°N and at some stations to the east of the Western Ghats over the central parts of the Peninsula showed a significant increasing trend at 95% level of confidence. Stations over the southern Peninsula and over the lower Ganga valley have been found to exhibit a decreasing trend at the same level of significance. The data series of the stations which showed trends were subjected to a 10-year moving average and the resulting smoothed series have been discussed. It may be said that this increasing or decreasing trend in the annual extreme rainfall events at a few places will have tremendous implications in the hydrologic studies and dam design projects.

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Authors and Affiliations

  1. Indian Institute of Tropical Meteorology, Pune, India

    P. R. Rakhecha & M. K. Soman

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  1. P. R. Rakhecha
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  2. M. K. Soman
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Rakhecha, P.R., Soman, M.K. Trends in the annual extreme rainfall events of 1 to 3 days duration over India. Theor Appl Climatol 48, 227–237 (1994). https://doi.org/10.1007/BF00867053

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  • DOI: https://doi.org/10.1007/BF00867053

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