![]() ![]() It is observed that seasonality index of rainfall of 34 subdivisions for all months are in the range 0.37 (Jammu & Kashmir) to 1.56 (Saurashtra Kutch & Diu). A seasonality index (SI) of a monthly rainfall is computed on monthly, seasonal (June to September) and annual scale. Method: The variation in seasonality in rainfall over the Indian region is examined using monthly rainfall values for the period 1951 to 2015 of 34 meteorological subdivisions excluding two Sea Islands. Such studies are essential to identify the changes in runoff, infiltration, surface and groundwater management, agricultural planning, etc. This changing pattern in rainfall can be investigated by seasonality index (SI) of rainfall. Researchers noted that there is change in distribution of this monsoon rainfall associated with climate change and global warming. More than 80% of the country's rainfall is received during the monsoon season. ![]() Background: The varied topographical features of the Indian region are responsible for variation in distribution of rainfall over different parts of the country. ![]()
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