摘要
为了研究中国森林植被的时空变化 ,该文在遥感技术与GIS技术的支持下 ,对中国近 5a来森林植被动态变化进行了定量研究。首先通过空间分析 ,对森林植被的空间分布格局进行了分析。同时通过空间差异分析、流失流向分析以及重心迁移分析 ,对森林植被的时空变化进行了分析 ,并对森林植被时空变化的机制与驱动因子进行了探讨。分析结果表明 :我国土地利用格局主要由草地、林地、未利用地和耕地为主 ,其中 ,草地面积最大 ,林地与草地在空间分布上都存在纬度、经度和垂直方向上的三度空间规律性变化 ;5a中林草地变化的总趋势是减少的 ,耕地的增加主要以减少林草地为代价的 ,5a间林地重心向西南方向迁移 4km ,草地重心向南偏西方向迁移 2 .7km ;经济发展加速、人类活动增强是导致林草地减少的主要原因。
The research of land use and land cover change is one of focus points for study on the global changes. And the research of dynamic change of forestland and grassland is significantly important for better understanding land use/land cover change and environmental management for sustainable development. In order to study the dynamic changes of forestland and grassland in China during the past five years, the technologies of Remote Sensing and Geographical Information System are used to analyze the spatial and temporal dynamical features of forestland and grassland. Furthermore, the mathematical methodology for study on forestland/grassland change is explored and developed. This research focused on the dynamical analysis of spatial temporal change of forestland and grassland of China in five years. At the same time, the mechanism of forestland and grassland change and its driving forces were discussed in this paper.
出处
《资源科学》
CSSCI
CSCD
北大核心
2002年第5期64-69,共6页
Resources Science
基金
中国科学院知识创新工程重大项目 (编号 :KZCX1-Y -0 2 )
关键词
遥感技术
GIS技术
森林植被覆盖
时空变化
Remote sensing
Geographical information system
Forestland and grassland
Spatial temporal change
