吉林省近20年土地利用变化及驱动力分析

本文在 GIS平台支持下 ,分析了近 2 0年来吉林省土地利用变化的空间格局 ,阐明了耕地变化的人文驱动力。结果表明 ,1 980 - 2 0 0 0年 ,吉林省土地利用变化主要趋势为草地、林地、未利用地转化为耕地 ,其中草地向耕地的转化占总变化面积的 35 .0 1 % ,动态度最大。人文景观的影响程度有所增强。吉林省土地利用变化空间差异明显 ,西部变化较为剧烈。草地和未利用地转为耕地主要分布在西北部地区 ,林地转耕地多分布在森林边缘地带 ,耕地向城镇用地转化主要分布在中部城市聚集区 ,西部地区部分草地退化导致其向未利用地转化。人口增加、经济发展和宏观政策是该区域土地利用变化的主要驱动力。

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.