Analyses on temporal-spatial traits of land use in three gorges during 30 years

Based on MSS data in 1975 and Landsat TM data in 1987,1995,2000 and 2005,the land use change in the reservoir area of three gorges is conducted and several indexes to reflect the temporal-spatial traits during 30 years are discovered.It is showing that the areas of cultivated land,forestry land and grass land have been decreased while the areas of construction land and water have been increased during last 30 years.With combination of several feature indexes,the land use change trait of three gorges is understood,which is helpful for the land planning in reservoir area of three gorges and can provide reference for ecological environment protection.