摘要
分析 8 0和 90年代 2期土地覆被数据表明 ,随着黄河河源区自然条件的变化、人口数量的增加和人类活动的强度加大 ,使黄河河源区草地面积明显减少 ,尤其是覆盖度高的天然草场 .沙地裸地的面积迅速增加 ,表明黄河河源区的土地覆被已经遭受严重的破坏 .对黄河河源区土地覆被结构与变化过程、空间景观特征研究得出 ,近 10年来 ,流域土地覆被格局由依赖高覆盖度草地转变为其他覆被类型 。
Data analysis of land cover in 1980's and 1990's shows that with the natural condition changes, population explosion and human activity intensification, the land cover of the source regions of the Yellow River Basin has been seriously destroyed: grassland area decreased obviously, especially natural grassland with high vegetation coverage; area of sand land and bared land increased rapidly. Study on land cover structure and change process and landscape spatial characteristics shows that in the source regions of the Yellow River the land cover pattern transferred from high vegetation coverage grassland dependent to other coverage categories and grassland with high vegetation coverage has been destroyed obviously.
出处
《北京师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2004年第2期269-275,共7页
Journal of Beijing Normal University(Natural Science)
基金
国家重点基础发展规划资助项目 (G19990 4 36 0 1)
关键词
黄河河源区
土地覆被
转移矩阵
景观结构
the source regions of the Yellow River Basin
land cover
transfer matrix
landscape structure
