The monitoring and assessment of land cover in Three gorges area, one of the main ecological flimsy
zones in China, is helpful for better understanding the function of natural and human factors on
ecosystems. With the construction of Three gorges project, the concerns on the land cover change in
Three gorges area by policy makers are raising. In this paper, Landsat TM images in 1986, 1996, 2000
and CBERS images in 2006 are used to detect the change of land cover in Three gorges area, which
include the main regions and land cover types. A series of models are built to assess these changes.
Land use intension index model and land use comprehensive benefit model are used to assess the use
effect of land. Land use dynamic degree model is built to detect the intension of change for each land
cover type in each county of this area. Land use centroid model is used to detect the spatial shift,
which shows the human activities become more and more near the bank of Three gorges reservoir in
recent 20 years. At last, this paper analyzes the temporal-spatial change of land-use and land-cover of
Chongqing and discusses the main driving forces of land cover change in Three gorges area with the
method of correlation analysis, and constructs a Markov matrix model to forecast the land cover
change in the future 10 years.