availability is less than 1; blue-water footprint is less than 20% of natural runoff; EFR not violated), moderate (1–1.5; blue water footprint is between 20% and 30% of natural runoff; EFR violated), significant (1.5–2; blue-water footprint is between
30% and 40% of natural runoff; EFR violated) and severe (> 2;blue-water footprint is larger than 40% of natural runoff; EFR