Geography Reference
In-Depth Information
(a)
Cultivated land
Forestry area
Grassland
Built-up area
7000
6000
5000
4000
3000
2000
1000
0
year
(b)
(c)
Forestry area (managed)
Forestry area (unmanaged)
Forestry area
Grassland (grazed)
Grassland (other)
Grassland
2500
6000
5000
2000
4000
1500
3000
1000
2000
500
1000
0
0
2010 2015 2030 2045 2060 2075 2095
2010 2015 2030 2045 2060 2075 2095
year
year
Fig. 3.3 Land use change trends of China under REG scenario during 1990-2095; a Land use
change trends of cultivated land, forest land, grassland and built-up land; b trends of managed and
unmanaged forest land; c trends of grazed and other grassland (1,000 km
2
)
According to Fig.
3.4
, cultivated area increases from 1990 to 2035 and
decreases after then under CES scenario. As for the forestry area, the imple-
mentation of conservation measures has protected the forestry area excellently, so
the forestry area increases all the way from 2005 to 2050, although it decreases
during 1990-2005. After 2050, it will make small range of reduction. The
unmanaged forestry area has been reduced all the time, while it will rise after
2070. The total forestry area decreases first and then increases due to the imple-
mentation of environmental conservation strategy. Grassland decreases during
1990-2030 and then increases after 2030. According to Fig.
3.4
, unexplored
