SPEI-Based Spatiotemporal Analysis of Drought in Haihe River Basin from 1961 to 2010

Figure 7

The comparison of spatial distribution of the occurrence probability of (a) drought, (b) light drought, (c) moderate drought, (d) severe drought, and (e) extreme drought between 1961 and 1990 (left) and between 1991 and 2010 (right).

(a)

(b)

(c)

(d)

(e)