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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。
Taking medium-resolution Landsat series as data source and object-oriented image analysis (OBIA) method, the main characteristics and driving forces of land cover change in South Korea from 1990 to 2015 were studied. The study found that the area of artificial land, woodland, wetland, cultivated land and water in South Korea changed greatly in the past 25 years. The most obvious artificial surface expansion was an increase of 1 847.24 km2 (+ 38.97%), mainly in the metropolitan area centered around Seoul, mostly from cultivated land and woodland. The area of forest land, wetland and cultivated land decreased by 776.71 km2, 707.32 km2 and 426.65 km2 respectively. In the past 25 years, the land cover change in South Korea mainly concentrated in areas with low elevation (<100 m) and small slope (<3 °). Human activities such as population growth, urban expansion, economic development and policy control are the main reasons for the change of land cover in South Korea.