Research Article

Spatiotemporal Analysis of Drought Characteristics in Song-Liao River Basin in China

Table 1

Classification standard of drought based on SPEI.

Drought classificationSPEI

NormalMore 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 droughtLess than −2.0