The Standardized Precipitation Evapotranspiration Index (SPEI) offers a more accurate representation of drought conditions compared to the Standardized Precipitation Index. This is because it incorporates evapotranspiration calculations, thus making it superior to the latter. For this study, we calculated the spatial distribution of the SPEI index over a 12-month period in a particular region. The results clearly depict alternating patterns of drought (in red) and moisture (in blue) in the area. For instance, from January 2000 to March 2003, the extent of the drought gradually expanded to cover the entire region by January 2002. The severity of the drought also deepened during this period. However, afterwards, the drought started to weaken, indicating a gradual diminishing trend.
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