Table 17. Estimate of annual rate of land degradation in mid latitude drylands (calculated from Mainguet, 1991; UNEP, 1991). Rate of desertification Land use Total land area (Mha) Mha/yr % of total/yr 131 0.125 0.095 Irrigated land 3700 3.200 0.086 Rangeland Rainfed cropland 570 2.500 0.439 4410 5.825 0.132 Total Mha = 106 ha Table 18. Estimates of land area under different vulnerability classes of desertification and the number of impacted people (Eswaran et al., 2001). Vulnerability Area Affected Population Class 106 % of Global Land Area 106 People % of Global Population km2 Low 14.60 11.2 1,085 18.9 Moderate 13.61 10.5 915 15.9 7.12 5.5 393 6.8 High Very High 7.91 6.1 255 4.4 43.24 33.3 2,648 46.0 Total
Table 17. Estimate of annual rate of land degradation in mid latitude drylands (calculated from Mainguet, 1991; UNEP, 1991). Land use Total land area (Mha) Rate of desertification Mha/yr % of total/yr Irrigated land 131 0.125 0.095 Rangeland 3700 3.200 0.086 Rainfed cropland 570 2.500 0.439 Total 4410 5.825 0.132 Mha = 106 ha Table 18. Estimates of land area under different vulnerability classes of desertification and the number of impacted people (Eswaran et al., 2001). Vulnerability Class Area Affected Population 106 km2 % of Global Land Area 106 People % of Global Population Low 14.60 11.2 1,085 18.9 Moderate 13.61 10.5 915 15.9 High 7.12 5.5 393 6.8 Very High 7.91 6.1 255 4.4 Total 43.24 33.3 2,648 46.0
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