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Table 1

Regional rainfall distribution based on percentage departure

Type of distributionDecision range
Excess rainfall +20% or more 
Normal rainfall Between – 19% and +19% 
Deficit rainfall Between −20% and −59% 
Scanty rainfall Between −60% and −99% 
No rainfall Less than −100% 
Type of distributionDecision range
Excess rainfall +20% or more 
Normal rainfall Between – 19% and +19% 
Deficit rainfall Between −20% and −59% 
Scanty rainfall Between −60% and −99% 
No rainfall Less than −100% 

Source: (Kanellopoulou 2002).

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