Short Essay on the Variability of Rainfall

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There is high variability of rainfall which goes up to 75%. The area from the point of variability can be divided into the following zones:

(a) Very Low Rainfall Variability.

(Upto 15%). This area includes Malabar Coast, north-eastern states, W Bengal, northern Orissa, western M.P and parts of Bihar.

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(b) Low Rainfall Variability.

It ranges between 15 to 30%. It includes some parts of Middle Eastern W Bengal, middle M.P, northern U.P, a narrow belt cast of the Western Ghats, etc.

(c) Moderate Rainfall Variability.

It ranges between 30 to 45%. It covers an area in a narrow belt east of Malabar, parts of Karnataka, T.N., central and western A.P, Maharashtra, northern M.P, southern U.P, eastern Haryana and Punjab.

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(d) High Rainfall Variability.

It ranges between 45 to 55%. It covers areas in northern Maharashtra, eastern Rajasthan, central Haryana, south-western Punjab etc.

(e) Very High Rainfall Variability.

It ranges between 55 to 75% and covers most of Gujarat and Rajasthan. Thar Desert is included in it.

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It is clear that in an area the variability increases with decrease of rainfall and conversely the variability decreases with the increase of rainfall.

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