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Mapping without the sun
Zhang, Jixian

It can be seen from Tab.3 that the conversion process took place
mainly between cropland, woodland, grassland and built-up land,
Thereinto, the conversion from cropland to urban land is the
most dominating. This illustrated that urban expanding took use
of a lot of cropland. In addition, some urban land was converted
to water area, which was caused by the Three Gorges dam
sluicing and nearby town submerged. It is obvious that the
increase of construction land and water area is at a cost of the
decrease of cropland, woodland, grassland.
1) All the above analyses have shown that the land use and land
cover status in Three Gorges Reservoir Area have changed
significantly in the recent 30 years. Cropland, woodland,
grassland decreased continuously, at the same time, water body
and built-up areas increased obviously.
2) Build-up areas increased continuously, and the increasing
speed had being enhanced based on a bigger number, it arrived
at the biggest 2.894% in 1995-2000 period, which were at the
cost of cropland, woodland, grassland.
3) In 2000-2005 period, water body increased most quickly by
1.918% on the dynamic degree of change at the expense of
woodland, grassland and even built-up areas, as a result of three
gorges dam built.
4) The research also released that the land use changes in Three
Gorges Reservoir Area are drived by two main forces: one is the
growing population with the non-agriculture population scale
enlarging, another is the constructing Three Gorges Project,
which brought migration moving, land submergence, and
accelerated the regional economy, leading to the rapid rise in the
use of construction land.
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[Foundation: China’s National Social Development Research
Programme funded by the Ministry of Science and Technology,