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Table 1 Standardized Anomaly Index Value interpretation (Funk et al. 2015)

From: Spatio-temporal variability and trends of hydroclimatic variables at Zarima Sub-Basin North Western Ethiopia

SAI Value

Category

2 + 

Extremely wet

1.5 to 1.99

Very Wet

1 to 1.49

Moderately wet

− 0.99 to 0.99

Near normal

− 1.49 to − 1

Moderately dry

− 1.99 to− 1.5

Severely dry

− 2 and less

Extremely dry