Research Article

Spatio-Temporal Rainfall Variability and Concentration over Sri Lanka

Table 2

Standardized rainfall anomaly index (SRAI) value and classes [52].

SRAI valueCategory

2 and aboveExtremely wet
1.5 to 1.99Severely wet
1.0 to 1.49Moderately wet
−0.99 to 0.99Near normal
−1.0 to −1.4Moderately dry
−1.5 to −1.99Severely dry
−2 and lessExtremely dry