Temporal-Spatial Characteristics of Drought in Guizhou Province, China, Based on Multiple Drought Indices and Historical Disaster Records

Figure 7

Trend distribution of drought duration: (a) SPI, (b) CI, and (c) RDI. The red dots indicate a significant positive trend (Z > 1.96) and the purple points indicate the insignificant positive trend (0 < Z > 1.96). The green points indicate the significant negative trend (Z < −1.95).

(a)

(b)

(c)