Research Article
Analysis of Spatial and Temporal Distribution Characteristics of Land Desertification Based on GIS and Remote Sensing Images
Table 4
Desertification land area and percentage of different grades from 1991 to 2020.
| | Type | 1991–2000 | 2001–2010 | 2011–2020 | | Area (104 km2) | Percentage (%) | Area area/104 km2 | Percentage (%) | Area area/104 km2 | Percentage (%) |
| | Nondesertification | 196.12 | 36.91 | 213.73 | 40.23 | 236.22 | 44.46 | | Mild desertification | 67.99 | 12.80 | 60.57 | 11.40 | 50.24 | 9.46 | | Moderate desertification | 50.21 | 9.45 | 45.69 | 8.60 | 42.84 | 8.06 | | Severe desertification | 101.17 | 19.04 | 94.22 | 17.73 | 72.98 | 9.46 | | Extremely severe desertification | 115.40 | 21.72 | 116.93 | 22.01 | 128.84 | 24.25 |
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