Table 2. Area of each of five land-use and land cover types for the entire study region in two periods and the relative change in area between the two periods.

Period Unit of measure Cropland Grassland Forest and afforestation Water bodies Miscellaneous
1985–1989 km² 49348.6 151320.3 15033.9 7384.6 1294.6
% 22.0 67.4 6.7 3.3 0.6
2002–2004 km² 58057.6 137817.9 19402.5 8675.5 415.7
% 25.9 61.4 8.6 3.9 0.2
Relative change % 17.6 −8.9 29.1 17.5 −67.9

Note: The relative change was calculated as Δrelative = 100 × (YfinalYinitial)/Yinitial, where Y is the area of the land-use and land cover type.