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Table 2 Modified Classes of NRI Values

From: Drought occurrences and its implications on the households in Yobe state, Nigeria

Index Character of Rainfall Vulnerability level
1.31 or more Very wet Highly vulnerable
0.86 to 1.30 Moderately wet Vulnerable
0.51 to 0.85 Mildly wet Slightly vulnerable
0.50 to −0.50 Near normal Not vulnerable
−0.51 to − 0.85 Mild drought Slightly vulnerable
−0.86 to −1.30 Moderate drought Vulnerable
−1.31 or less Severe drought Highly vulnerable
  1. Source: Adapted from Turkes (1996)