Research Article
Spatio-Temporal Rainfall Variability and Concentration over Sri Lanka
Table 2
Standardized rainfall anomaly index (SRAI) value and classes [
52].
| SRAI value | Category |
| 2 and above | Extremely wet | 1.5 to 1.99 | Severely wet | 1.0 to 1.49 | Moderately wet | −0.99 to 0.99 | Near normal | −1.0 to −1.4 | Moderately dry | −1.5 to −1.99 | Severely dry | −2 and less | Extremely dry |
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