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e
Fig. 5. Land cover classification from MODIS in 2000 (a), 2003 (b), 2006 (c), 2008 (d) and
2010(e)
A lot of change of land cover types can be found during the period from 2000 to 2010. In the
classification map of 2000, woodland is the main class, which takes up to 47.68% of the
study area; grassland is about 31.82% and farmland takes up to 8.32%, while other classes
are relatively small. However, in 2008, the woodland only takes 38.69%, and grassland and
farmland are up to 37.03% and 10.97%, respectively, which may suggest that these
woodland areas were degenerating into grassland and farmland areas in a large region with
the intensifying degree of RD issues. But this trend stops from 2008 to 2010. From 2008 to
2010 the woodland has increased to 44.95% and grassland and farmland decreased to
35.50% and 8.23%, respectively.
Table 3 and Fig. 6 show the total percentage and area of each land cover type from 2000 to
2010. It is clear that residential areas, farmland and grassland increased remarkably,
whereas woodland decreased dramatically. In comparison, unused land areas decreased
quite smaller, while water areas retains relative stable.
water
wood
grassland
farmland
residence
unused land
2000
3.24%
47.68%
31.82%
8.32%
6.16%
2.78%
2003
4.05%
45.03%
33.52%
7.55%
3.20%
6.66%
2006
5.72%
44.09%
33.04%
6.16%
4.74%
6.24%
2008
3.30%
38.69%
37.03%
10.97%
3.74%
6.26%
2010
3.40%
44.95%
35.50%
8.23%
3.80%
4.13%
Table 3. The percentages of each land cover type in 2000, 2003, 2006, 2008 and 2010
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