Hydroclimatic fluctuations of the Upper Narmada catchment and its association with break-monsoon days over India |
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| Authors: | Nityanand Singh M K Soman K Krishna Kumar |
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| Institution: | (1) Indian Institute of Tropical Meteorology, 411005 Pune, India |
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| Abstract: | In this paper, hydroclimatic fluctuations of the Upper Narmada catchment (upto Narmadasagar damsite) have been studied by
examining the time series (1901–80) of (i) 1-to 10-day annual extreme rainfall; (ii) seasonal total rainfall between May and
October; (iii) the precipitation concentration index (PCI); (iv) a modified version of PCI(MPCI); and (v) parameters of the
periods contributing specified percentages of rainfall to annual total. Most of these parameters followed the normal distribution
and did not show any significant long-term trend. However, some dominant long period oscillations have been noticed in extreme
rainfall, seasonal rainfall, PCI and MPCI series. Influence of break-monsoon days over India during July and August on the
rainfall activities of the Upper Narmada catchment has also been investigated and salient findings discussed. |
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| Keywords: | Seasonal rainfall precipitation concentration index hydrological floods and droughts rainfall period break-monsoon days |
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