Figure 6: SPI-3 and SPEI-3 values averaged across all stations.
PDSI Temporal Trends
Figure 7 complements SPI-3 and SPEI-3 by capturing longer-term soil
moisture anomalies. The 2012 drought stands out, with PDSI values
reaching extreme lows, indicative of prolonged water deficits. Wet
conditions in 2008 and 2010 demonstrate the index’s ability to capture
excessive moisture periods, which can also influence crop productivity.