基于MODIS数据的内蒙古草地植被退化动态监测研究  

THE DYNAMIC VARIATION OF GRASSLAND VEGETATION DEGENERATION BASED ON REMOTE SENSING MODIS DATA

作　　者：薛存芳[1] 张玮[1] 

机构地区：[1]中国农业大学信息与电气工程学院,北京100083

出　　处：《国土资源遥感》2009年第2期97-101,105,共6页Remote Sensing for Land & Resources

基　　金：国家863课题"退化草地封育恢复的数字化管理技术研究"(2006AA10Z250)

摘　　要：以内蒙古自治区为研究区,利用卫星遥感、GIS和GPS技术,在实地调查和样方测定的基础上,选用群种自然生殖枝高度、草地植被覆盖度和草地生物量3个评价指标,并将其加权综合得到草地植被退化指数(GDI).将GDI与提取的各种植被指数进行相关分析,选出最能反映草地退化趋势且与植被退化指数线性拟合最好的植被指数--修正的土壤调节植被指数(MSAVI).采用线性回归方法建立草地植被退化的遥感监测模型,分析了研究区2002年~2006年草地植被退化的时空分布规律和变化趋势.研究表明,与2002年相比,2006年内蒙古地区草地植被退化状况呈现整体改善、局部恶化的情况.With Inner Mongolia as the study area,the authors selected the height,coverage and biomass as the single indices for the assessment of grassland degradation based on field survey and random samples,and calculated the grassland degradation index(GDI) by integrating the height,coverage,and biomass.According to a correlation analysis between GDI and every vegetation index computed,the GDI and the MSAVI were chosen as the best variables to build the grassland degradation model with linear regression by using of RS,GIS,and GPS techniques.The grassland degradation time-space distribution and the variation tendency in 2002 and 2006 were also analyzed.It is concluded that the vegetation degeneration situation has on the whole shown an improvement,but with partial worsening in 2006 compared with things in 2002.

关 键 词：草地植被 退化 MODIS数据 遥感 动态监测 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]