基于TM的陕北农牧交错带土地利用覆盖动态变化遥感监测

以1986、1993及2000年3期Landsat TM遥感影像为基础数据,应用遥感技术与地理信息系统相结合的方法,分析了陕北农牧交错带1986～2000年土地利用的数量变化和空间变化特征.结果显示,该区近15 a来耕地面积减少,城乡用地逐年扩大,林、草地明显增加;但土地荒漠化的趋势还在加剧.

Land use dynamic monitor based on the TM data in agriculture and pasturage interlaced zone of northern Shaanxi

The land use/land cover change in agriculture and pasturage interlaced zone of northern Shaanxi of China in the past 15 years was investigated through land use/land cover classification of three sets of the multi-temporal remotely sensed data of TM,acquired on August 2 1986,July 30,1993 and August 9,2000 respectively.Based on the RS and GIS,this research attempted to monitor on the land use/land cover process and spatial heterogeneity dynamic change.The results show that the total area of plantation was decreasing,the scale of urban and country area had highly enlarged,and the area of forest land and grass land each has increased obviously.The quality of eco-environment was improved in the area.But the sandy desertification situation was more serious.