自然资源学报 ›› 2019, Vol. 34 ›› Issue (2): 288-300.doi: 10.31497/zrzyxb.20190206

• 资源利用与管理 • 上一篇    下一篇

1990-2015年朝鲜土地覆被变化及驱动力分析

董禹麟1,2(), 于皓2,3, 王宗明2, 李明玉1()   

  1. 1. 延边大学理学院地理系,延吉 133002
    2. 中国科学院东北地理与农业生态研究所湿地生态与环境重点实验室,长春 130102
    3. 中国科学院大学,北京 100049
  • 收稿日期:2018-07-16 修回日期:2018-12-03 出版日期:2019-02-28 发布日期:2019-02-28
  • 作者简介:

    作者简介:董禹麟(1993- ),男,河北承德人,硕士,研究方向为生态遥感。E-mail: woorin5789@126.com

  • 基金资助:
    中国科学院重点部署项目课题(KZZD-EW-08-02);国家自然科学基金项目(41461036)

Land cover change of DPRK and its driving forces from 1990 to 2015

DONG Yu-lin1,2(), YU Hao2,3, WANG Zong-ming2, LI Ming-yu1()   

  1. 1. Department of Geography, College of Sciences, Yanbian University, Yanji 133002, Jilin, China
    2. Key Laboratory of Wetland Ecology and Environment, Northeast institute of Geography and Agroecology, CAS, Changchun 130102, China
    3. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2018-07-16 Revised:2018-12-03 Online:2019-02-28 Published:2019-02-28
  • Contact: LI Ming-yu E-mail:woorin5789@126.com;leemy@ybu.edu.cn

摘要:

基于Landsat TM/OLI遥感数据,采用面向对象的图像分析方法,提取1990年和2015年朝鲜土地覆被信息,定量描绘土地覆被变化。结果表明:25年间朝鲜土地覆被共变化1.1×104 km2,林地和湿地分别减少4976.1 km2、203.3 km2,耕地和人工表面分别增加4821.5 km2、80 km2;耕地面积增加明显,94.6%的耕地来源于林地,两者的主要转化区在海拔为100~1000 m、坡度为 8°~35°的坡地;黄海北道的土地覆被变化最显著,其次是平安南道,两江道最不明显。人口增长、经济环境退化和宏观政策的调控等人为因素是推动朝鲜土地覆被变化的主要原因。本文弥补了朝鲜长时间尺度土地覆被变化研究的空白,同时为东北亚地区土地资源可持续利用和生态环境保护奠定了基础。

关键词: 土地覆被变化, 驱动力, 遥感, 面向对象的图像分析方法, 朝鲜

Abstract:

Land cover change (LCC) is an important part of global change study and sustainable development research. Accurately describing the process of land surface change at the national scale is a necessary step in the study of the relationship between man and nature. The analysis of land cover change of Democratic People's Republic of Korea (DPRK), a hot developing country of concern to the international community, will be a key point to lay a foundation for the sustainable utilization of land resources and ecological environment protection in Northeast Asia and cross-boundary region of China. In this study, Landsat TM/OLI images of DPRK in 1990 and 2015 were used to extract the information of land cover by using object-based images analysis (OBIA) and some statistical data were used to analyze the driving forces of land use change in DPRK. The results showed that forestland (-4976.1 km2) and cropland (+4821.5 km2) were the most obviously changed land cover of DPRK in the 25 years. Wetland decreased by 212.2 km2, while built-up land increased by 82.8 km2. Among various land cover changes of DPRK, the expansion of cropland converted mainly from montane forest (94.6%) were essential and fast. The conversion between forestland and cropland significantly occured in sloping fields with relatively high elevations (100-1000 m) and intermediate slope gradients (8°-35°). In the meantime, the changed area of wetland and built-up land were mainly found at lower elevation (0-100 m and 0-200 m) areas which were nearly flat (0-8°). North Hwanghae, with a change rate of 17.3%, was the most obviously changed district, followed by South Pyongan. Land cover change of Ryanggang was least apparent with a change rate of 2.2%. DPRK has been suffering from the economic downturn and worsening natural environment since the 1990s, and its land cover changes were influenced mostly by human factors such as the growth of population, the deterioration of economic environment and the regulation of national macro-policy.

Key words: land cover change (LCC), driving force, remote sensing (RS), object-based image analysis (OBIA), Democratic People's Republic of Korea (DPRK)