摘要
基于MODIS数据,采用基于像元尺度的趋势分析和稳定性分析方法,深入分析了河北坝上地区近13 a的植被变化特征。研究表明:空间分布上,坝上全区地表植被覆盖从西向东依次渐好,各分区域的季节变化特征具有明显的差异性;时间上,近13 a以来坝上大部分地区植被覆盖有改善的趋势,其中得到改善的区域占坝上总面积的51.35%,基本不变的区域占25.68%;同时,因坝上地区生态环境比较脆弱,植被生长易受自然和人为因素的干扰,植被覆盖在时间序列上的稳定性较差,坝上全区每年的NDVI最大值合成数据的变异系数Cv平均值达到14.85%,Cv<10%的区域仅占坝上总面积的15.3%。
Using trend analysis and stability analysis methods, the authors studied the dynamic change characteristics of surface vegetation cover in the past 13 years in Bashang Area of Hebei Province based on MODIS data. Some conclusions have been reached： In spatial distribution, the surface vegetation cover of Bashang area became better gradually from west to east and there existed remarkable differences in the seasonal variation features of sub -regions. In time, there was an improving trend in most parts of Bashang Area in the past 13 years, with the improved area accounting for 51.35% of the total area and the basically unchanged area accounting for 25.68%. However, the vegetation growth was easily affected by natural factors and human activities, and its ecological environment was relatively fragile, so the vegetation cover was unstable in the time series, the mean value of MNDVl coefficient of variance （Cv） was 14.85%, and the proportion of the area with Cv 〈 10% was 15.3%.
出处
《国土资源遥感》
CSCD
北大核心
2014年第1期167-172,共6页
Remote Sensing for Land & Resources
基金
河北省科学院青年基金项目(编号:12137)
河北省科学院4个对接项目(编号:13130)共同资助
关键词
遥感
植被覆盖
趋势分析
动态变化
河北坝上地区
remote sensing
vegetation cover
trend analysis
dynamic change
Bashang Area of Hebei Province
