4.4 Spatial SPI
The spatial extension and intensity of drought from SPI 6 month and SPI 12 month from 1976 are shown in figure 9 and figure 10 respectively. The spatial distribution of SPI 6 month and SPI 12 month is similar in the area mostly affected by drought which is mostly found in the Western and Southern part of the region. The severity of drought for SPI 6 month and SPI 12 month in the region is mainly classified into 3 groups. Moderately dry to extremely dry are found in the Western and Southern part, near normal is found in the central part and moderately to extremely wet are found in the North and Northeast of the region. The worst drought was in 1979, 1981, 1986, 1997 and 2001 for SPI 6 months and SPI 12 months. However, the drought affected areas are more severe and extend larger for SPI 6 months.