摘要
以中等分辨率Landsat系列影像为数据源,利用面向对象的图像分析(OBIA)方法,研究1990~2015年韩国土地覆被变化的主要特征与驱动因素。研究发现:近25 a来,韩国人工表面、林地、湿地、耕地和水体面积变化较大。人工表面扩张最为明显,面积增加了1 847.24 km2(+38.97%),主要发生在以首尔为中心的首都圈地区,多由耕地和林地转化而来。林地、湿地和耕地面积分别减少776.71 km2、707.32 km2和426.65 km2。过去25 a间韩国土地覆被变化主要集中分布在海拔较低(<100 m)和坡度较小(<3°)的区域。人类活动因素,如人口增长、城市扩张、经济发展及政策调控等是造成韩国土地覆被变化的主要原因。
Studying the long-term changes of the terrestrial system of neighboring countries could be of great significance for the utilization of natural resources and environmental management in China. Based on Landsat TM/OLI images, the paper analyzed the characteristics of land cover change and their driving forces in 1990 and 2015 in the Republic of Korea（ROK） by using object-based images analysis（OBIA）. The result shows artificial surface, forests, wetlands, cropland and waterbody underwent great changes from 1990 to 2015. Artificial surface had the greatest increase, 1847.24 km^2 with an annual rate of 12.54%. The expansion of artificial surface was mainly located at Seoul economic circle, which was converted mainly by cropland and forests.The area of forests, wetlands and cropland decreased by 776.71 km^2, 707.32 km^2 and 426.65 km^2 respectively.In the past 25 years, the land cover changes mainly occurred where the elevation is under 100 m and the slope is less than 3°. The human factors consisting of population growth, urban expansion, economic development and policy regulation and control played an important role in land cover changes in ROK. The achievements of this study could provide scientific basis for the protection and rational utilization of land resources in China, especially in the Northeast China.
出处
《地理科学》
CSSCI
CSCD
北大核心
2017年第11期1755-1763,共9页
Scientia Geographica Sinica
基金
中国科学院重点部署项目课题(KZZD-EW-08-02)资助~~
