国土资源遥感Issue(4)：121-125,5.
近20年成都市植被覆盖度动态变化检测及原因分析
Dynamic Supervision and Reason Analysis of Vegetation Coverage Changes of Chengdu in the Past 20 years
摘要
Abstract
Using 1992,2001 and 2009 TM remote sensing data, the authors estimated the vegetation coverage change status of Chengdu in the past 20 years objectively and quantitatively. The study has practical significance for adjusting the climate, resuming the vegetation and preventing the natural disasters. Normalized difference value vegetation index ( NDVI) was used to estimate the vegetation coverage in different periods and draw the change grayness and change levels chart of Chengdu vegetation coverage. Data analysis results show that, from 1992 to 2009, the vegetation coverage in Chengdu was overall decreasing. The quantity of dense forest land, shrub land, high and middle grass and cultivated land was decreasing, in which the vegetation coverage decreased obviously from 1992 to 2001 ,the vegetation coverage remained reduced from 2001 to 2009 ,but the speed was slower than that from 1992 to 2001. In addition, the speckle distribution of artificial greenbelt appeared in the urban area,and the small - area climatic condition was improved continuously.关键词
植被覆盖度/归一化差值植被指数/动态变化Key words
Vegetation coverage/ Normalized difference vegetation index (NDVI) / Dynamic change分类
信息技术与安全科学引用本文复制引用
党青,杨武年..近20年成都市植被覆盖度动态变化检测及原因分析[J].国土资源遥感,2011,(4):121-125,5.基金项目
地质灾害防治与地质环境保护国家重点实验室“科技减灾、重建家园”开放研究基金项目(编号:DZKJ-0806)资助. （编号:DZKJ-0806）
