Research Article
Forecasting Drought Using Multilayer Perceptron Artificial Neural Network Model
Table 1
The SPEI drought category classification provided by McKee et al. [
10].
| SPEI values | Drought classes |
| ≥2 | Extremely wet | 1.5 to 1.99 | Very wet | 1 to 1.49 | Moderate wet | .99 to −.99 | Near normal | −1 to −1.49 | Moderate drought | −1.5 to 1.99 | Severe drought | ≤−2 | Extreme drought |
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