三江源自然保护区土地覆被变化特征分析  

Characteristic Analysis of Land Cover Change in Nature Reserve of Three River's Source Regions

作　　者：赵志平[1,2] 刘纪远[1] 邵全琴[1] 

机构地区：[1]中国科学院地理科学与资源研究所,北京100101 [2]中国科学院研究生院,北京100039

出　　处：《地理科学》2010年第3期415-420,共6页Scientia Geographica Sinica

基　　金：国家重点基础研究发展计划项目(973计划-2009CB421105);国家科技支撑计划(2006BAC08B00);中国科学院西部行动计划项目(KZCX2-XB2-06-03)资助

摘　　要：基于中国土地利用/覆被遥感分类系统,利用1970年代中后期、1980年代末、2004年和2008年4期遥感图像分析三江源自然保护区近30a来土地覆被类型面积变化、转类途径与幅度及各保护区各圈层转类指数变化特征,结果表明:近30a来,草地总面积经历了一个增加-减少-增加的过程。自然保护区1970年代中后期至1980年代末和1980年代末至2004年土地覆被类型变化主要是草地覆盖度下降,土地覆被总体上具有转差趋势。近4a来草地退化趋势得到遏制,大部分的保护区和内部各圈层土地覆被都有转好趋势,可能与《规划》实施有关。Based on remote sensing classification system of China land use/cover change, we used four phases Landsat remote sensing images of middle and late 1970s, late 1980s, 2004 and 2008 for the process analysis of nature reserve land cover change in Three River＇ s Source Regions during the recent 30 years. The results showed that in total, grassland area experienced a process of increase-decrease-increase during the recent 30 year. From middle and late 1970s to 2004, decline of grassland coverage was the main appearance of land cover change, and land cover status had a deterioration trend. During the recent 4 years, grassland deteriorated trend alleviated. All zones had ameliorated trend of land cover change and core and buffer zones were more significant than experimental zone, which may related with the implementation of Planning.

关 键 词：转类指数 转类途径 土地覆被 三江源 

分 类 号：S127[农业科学—农业基础科学]