Study on the Land Use Change of Songhuajiang River Watershed Based on GIS

Based on the GIS,the Landsat TM(1996a,2005a)was used and land use information was got,information on land use dynamic changes and the using styles transform were picked up.The results shown: the increased area of forest land was maximum,and the decreased of cropland was minimum,The retention rates of the forestland,water area and build land were high,and the conversion rates of the grassland,unused land and cropland were high,studying on the spatial pattern of land use change had the significance on the sustainable development of land resources use and keep the ecological balance in the research area.