Drought Prone Area
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A drought prone area is defined as one in which "the probability of drought year is greater than 20%
Cronic drought prone area: A cronic drought prone area is defined as one in which the probability of a drought year is greater than 40%.
The criterion described above is useful for a continuous monitoring of the monsoon season. The sum of the seasons rainfall becomes the basis for describing a region under moderate or severe drought. When more than 50% of the area in the country is affected is described as severely affected by drought & when the area of 26 – 50% of the country is affected it is described as an incidence of moderate drought.