Vulnerability | EVI range of values | Index description |
Extremely high | 0.00 | Totally degraded ecosystem with deteriorated soil and prone to aridity, vegetation is far less than <1% of the land area |
Very high | 0.00 - 0.24 | Extremely unstable ecosystem, with poor resistance to degradation, and very low vegetation cover (<5%) with evidence of deteriorated soil |
High | 0.24 - 0.31 | Unstable ecosystem, with poor resistance to degradation and low vegetation cover (5% - 10%), a desert-prone area, exposed area under influence of dune dynamics |
Moderate | 0.31 - 0.38 | Somewhat unstable ecosystem, with relatively low vegetation cover (10% - 20%) and resistance to degradation, evidences of large dune collection depicting desert-prone landscape |
Low | 0.38 - 0.51 | Relatively stable ecosystem, with relatively high vegetation cover (20% - 40%) and possible resistance to degradation, semi-exposed soil, spots of shrubs, and grasses |
Very low | >0.51 | Stable ecosystem, with relatively high vegetation cover > 40% and high resistance to degradation. |