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Table 6 Drought occurrences (%) in GWB at corresponding drought categories and time steps

From: Spatial and temporal appraisal of drought jeopardy over the Gangetic West Bengal, eastern India

Draught Severity Class SPI values 3-M. Lag 12-M Lag 24-M Lag 48-M Lag
Moderately dry (D1) (−1.0 to − 1.49) 8.76 10.80 7.83 13.08
Severely dry (D2) (−1.5 to − 1.99) 4.09 4.20 5.66 3.91
Extremely Dry (D3) (−2 and less) 3.11 1.24 2.66 1.10
Total (%) of all categories drought 15.96 16.24 16.15 18.10