182
It can be seen from Tab.3 that the conversion process took place
mainly between cropland, woodland, grassland and built-up land,
water.
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.
4. CONCLUSION AND DISCUSSION
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.
REFERENCES
Ding F, Chen W H. Analysis of Land Use Changes in Fujian
Province Based on 3S Technology[J], Journal of Fujian Normal
University (Natural Science Edition) 2004. 20(l):92-98.
Hunter L M, Gonzalez M de J G, STEVENSON M et al.,
Population and land use change in the California Mojave:
Natural habitat implications of alternative futures [^.Population
Research and Policy Review, 22:373-397.
J. Y. Liu, H. Q. Tian, M. L. Liu, et al., “China’s changing
landscape during the 1990s: Large-scale land transformations
estimated with satellite data, “ Geophysical Research Letters,
2005, Vol. 32.
Liu J Y. The macro investigation by remote sensing technology
and dynamic research of China’s resource and environment[M],
Beijing: China Science and Technology Press. 1996.
Meng J J, Shen W M, Wu X Q. Integrated Landscape Ecology
Evaluation Based on RS/GIS of Three-Gorge Area[J]. Acta
Scientiarum Naturalium Universitatis Pekinensis, Vol.41, No.2
Mar.2005.
Q. Wang, W. J. Wang, H. J. Luo, et al., “Macro ecology
monitoring techniques on remote sensing,” Beijing, China:
China environment science press, 2006:124-125.
Semwal R L, Nautiyal S, Sen K K, et al., Patterns and
ecological implications of agricultural land-use changes: a case
study from central Himalaya, India[J].Agriculture, Ecosystems
and Environment. 102 (1): 81-92.
Shi P J., Gong P.> Li X B, et al. Method and practice on
landuse cover changes research. Beijing: Science press. 1996.
Zhao S H, Feng X Z, Du J K. Spatio-temporal changes analysis
of land use at county level based on RS and GIS[J].Bulletin of
Surveying and Mapping.2003(3):16-17.
Z. Q. Huang, W. C. Zhou, J.M. Zhou, M.C. Zhu, “ Land Use of
the Three Gorges Reservoir Area and the Effect on Its
Landscape Pattern in the Recent 50 Year,” Wu han University
Journal of Natural Sciences, Wuhan, China, 2006,11:910-914.
[Foundation: China’s National Social Development Research
Programme funded by the Ministry of Science and Technology,
NO.2004DIB3J107]
