Research Article
Spatiotemporal Analysis of Drought Characteristics in Song-Liao River Basin in China
Table 1
Classification standard of drought based on SPEI.
| Drought classification | SPEI |
| Normal | More than −0.49 | Light drought | −0.99 to −0.5 | Moderate drought | −1.49 to −1.0 | Severe drought | −1.99 to −1.5 | Extreme drought | Less than −2.0 |
|
|