Analyses on Changes of Land Use in Three Gorges Based on Quantitative Research

Based on the MSS datum in 1975 and Landsite TM datum in 1987, 1995, 2000 and 2005, monitored the land use change in the Reservoir Area of three Gorges was conducted with the support of several indexes to reflect the temporal-spatial changes during 30 years. The results as following, (1) The areas of cultivated land, forestry land, grass land decreased but the areas of construction land and water area increased during 30 years. (2) Used the indexes to indicate the trend of change. Making use of several indexes can reflect changes of land use absolutely, which is helpful for the land planning in Reservoir Area of Three Gorges.