摘要
利用五指岭山区1981年的MSS影像,1994年、2001年和2009年的Landsat TM影像,2013年的Landsat 8影像共5期数据,采用基于归一化植被指数(NDVI)的像元二分模型计算得到五指岭山区的植被覆盖度,对该区植被覆盖度变化进行分析。结果显示:五指岭山区植被覆盖度整体呈增长趋势,近30年间植被覆盖度平均增长了0.23,增长率为56.11%,1994—2013年的19年间,植被覆盖度增长速率较大,涨幅约为1981—1994年13年间的2倍。该区植被覆盖度的变化主要受气候变化、经济发展、造林绿化政策和人类活动的影响,与地貌因素关系较小。
Using MSS image in 1981 ,TM image in 1994 ,2001 ,2009 and OLI image in 2013 of Wuzhiling Mountain Area . The vegetation coverage was calculated by using the dimidiate pixel model based on the normalized difference vegetation index （NDVI） ,and analyzed vegetation change in this area .The result showed that a growth trend of vegetation coverage in this area .Over past 30 years ,the average growth was 0 .23 ,and the growth rate was 56 .11% .The growth rate of vegetation coverage from 1994 to 2013 was 2 times of that from 1981 to 1994 .In this area ,the changes of vegetation coverage were mainly affected by climate change , economic development ,the afforestation policy and human activities ,rather than by landform factor .
出处
《国土资源科技管理》
2015年第2期107-113,共7页
Scientific and Technological Management of Land and Resources
基金
国家科技支撑项目(2012BAC19B05)
关键词
植被覆盖度
遥感
DEM
NDVI
五指岭山区
vegetation coverage
remote sensing
DEM
NDVI
Wuzhiling Mountain Area
