干旱区土地利用/覆盖时空动态变化分析--以准格尔旗为例

Spatial and temporal dynamic analysis of land use/cover change in arid areas:A typical example of Zhungeer

为评估植被恢复以及土地利用变化对生态脆弱地区的影响,文中选取准格尔旗为研究区,基于1990、2000、2009年三期美国陆地卫星遥感影像提取各时期的土地利用类型,在30m栅格尺度上定量评价并分析其动态变化。变化的驱动因素主要有自然因素、人口增长和城市化、过度矿产资源开发等负面因素和生态恢复政策的正面因素。结果表明:过去20年间,人类活动及资源开采对生态环境的干扰增加,植被恢复的过程是有效而缓慢的。

In order to assess the vegetation restoration and land use changes in ecologically fragile areas,we selected Zhungeer as the study area,extracted the land use types using Landsat images in 1990,2000 and 2009,respectively.Then,we quantitatively assessed the changes in 30m grid-scale and qualitatively analyzed the drivers of change,which contains the negative factors： natural conditions,population growth and urbanization,over-exploitation of mineral resources and the positive factor： ecological restoration by policies.Results showed that during the past 20 years,the interference of human activities and the exploitation of resources on the ecological environment were increased,while the vegetation recovery process was effective but slow.