Analysis on Land Use Change and its Driving Forces in Jilin Province in Recent 20 Years

Supported by the GIS platform, this research analyzed the spatial pattern of land use change of Jilin province in recent 20 years, and elucidated thehuman driving forces for the changes of cultivated land. Results showed that in the period 1980 to 2000, the main trends of Jilin province's land use change were the transforming from grassland, woodland, and unused land to cultivated land. Among which, the transformed area from grassland to cultivated land was 35.01 percent of the total transformed area, and the dynamic degree of grassland was the biggest. In the process of land use change, the intensivity of huaman landscape has been enhanced. The spatial difference of land use change was obvious, and the change in western of Jilin province was very big. The transformed cultivated land from grassland and unused land mainly distributed in the northwest, the transformed area from woodland located in the edge region of woodland; the transformed urban from cultivated land distributed in the middle district where gathered many cities. In addition, part of grassland in the west as degraded to unused land. population increase , economic development and macroscopic policy were the major driving forces for land use change of the studied area.