基于MODIS NDVI时间序列的植被覆盖变化特征研究  

Study on characteristics of land cover change using MODIS NDVI time series

作　　者：王红说[1] 黄敬峰[1] 

机构地区：[1]浙江大学环境与资源学院农业遥感与信息技术应用研究所,浙江杭州310029

出　　处：《浙江大学学报（农业与生命科学版）》2009年第1期105-110,共6页Journal of Zhejiang University:Agriculture and Life Sciences

基　　金：国家科技支撑计划资助项目(2006BAD10A01);国家高技术研究发展计划863"资助项目(2006AA120101)

摘　　要：为监测浙北地区植被覆盖变化特征,利用离散傅立叶变换技术对MODISNDVI时间序列数据去云和噪声处理,通过土地利用现状图上提取的地类进行植被分区,研究各个分区的植被覆盖特点;以变化矢量的模衡量植被覆盖变化的强度和稳定性.结果表明,耕地区的植被覆盖变化较大,林地区的植被覆盖变化较小,建筑区的植被覆盖变化居中;受种植差异和时间推移等季相信息的影响,耕地区作物变化矢量的模值亦会增大.研究表明城市化和人类活动对耕地区植被影响较为明显.Characteristics of vegetation cover change in northern Zhejiang Province was detected using MODIS NDVI time series. Discrete Fourier transform （DFT） method was applied to deduct the noisy and abnormal points. Districting map was got from land use map, in order to find out the vegetation cover characteristics of different district. Modulus of change vector was adopted to fix the change intensity and stability of vegetation. Results show that change of vegetation cover in cultivated area was remarkable, while that in the forestry area was relatively small, and that in the built-up area was in the middle. The modulus of change vector was increased by the affection of phenology information such as different growing type and time delaying. The results above suggested that urbanization and human activities have significant effect on the vegetation cover of farm areas.

关 键 词：MODIS NDVI 时间序列 植被覆盖 离散傅立叶变换 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]