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河北坝上地区植被覆盖变化遥感时空分析

DOI: 10.6046/gtzyyg.2014.01.28, PP. 167-172

Keywords: 遥感,植被覆盖,趋势分析,动态变化,河北坝上地区

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Abstract:

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13a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13a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

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