图们江中游中朝土地利用/覆盖及变化比较研究

Comparative Study on LUCC of Tumen River Midstream between China and North Korea

以图们市和稳城郡的1991、2000、2009年3期的TM影像为基本数据源,在地理信息系统的支持下,采用分类回归树法(CART)对影像进行土地利用分类,并对这3个时期的土地利用/覆盖分类结果进行了动态变化分析。结果表明:1991～2009年问,图们江中游地区土地利用/覆盖类型变化剧烈,其中耕地增加最多,其次为建设用地;林地减少最多,水域和未利用地也都有所减少。图们市和稳城郡的土地利用/覆盖差异性以及变化差异性都较为显著,其中稳城郡的土地利用变化最为剧烈。自然因素和人文因素是这2个城市在这2个时期土地利用发生变化的重要因素,其中人文因素更为突出。

According to the basic data from the TM images of Tumen City and Wencheng City in 1991, 2000 and 2009, the land use images are classified by using Classification and Regression Tree （CART）, and suppor- ted by geographic information systems technology. The results show that the land use/cover classification changed greatly during the three periods. There have great differences in land use/cover change from 1991 to 2009 in the study area. The area of farmland has the largest increased, the secondly for construction land; water, unused land and the area of forest have reduced, while the area of forest has the mostly reduced. The differences on the land use/cover between Tumen City and Wencheng City are greatly obvious. The change of land use in Wencheng City is more intensity. Nature driving factors and human driving factors are the main reason for changes of land use type in the two cities, and the human driving factors is more prominent.