Drought Assessment by a Short-/Long-Term Composited Drought Index in the Upper Huaihe River Basin, China

Table 4

Drought categories of the short-term/long-term CDI.

Drought category	Short-term CDI	Long-term CDI
Normal	(−0.37, +∞)	(−0.33, +∞)
Mild drought	(−0.69, −0.37)	(−0.78, −0.33)
Moderate drought	(−0.97, −0.69)	(−1.16, −0.78)
Severe drought	(−1.36, −0.97)	(−1.39, −1.16)
Extreme drought	(−∞, −1.36)	(−∞, −1.39)