蒙陕甘宁能源金三角植被覆盖遥感监测与动态分析

Vegetation Monitoring and Analyzing of Golden Triangle Energy in Inner Mongolia,Shaanxi,Gansu,and Ningxia Region

蒙陕甘宁能源金三角地区以宁夏宁东、内蒙古鄂尔多斯、陕西榆林为核心,辐射陕西延安和甘肃陇东地区,是正在崛起的中国能源新基地。为了解该区域的植被及其动态变化,采用2000~2009年SPOT卫星VEGTATION遥感数据,对蒙陕甘宁能源金三角地区的植被覆盖变化状况进行了遥感监测和动态分析。结果显示:金三角地区2000~2009年植被覆盖度总体呈增加趋势,这与区域内近年来所实施的生态保护工程有关。其中,2008年最高,为45.45%,2000年最低,为33.74%,2005年和2009年略有下降。部分区域植被盖度降低的主要原因为城市扩张和区域资源开发。

The 'Golden Triangle'of MSGN(Inner Mongolia,Shaanxi,Gansu,Ningxia),a region with abundant energy resources,is a new energy base of China.To get the vegetation coverage status and its dynamic change,the 2000~2009 SPOT-VEGTATION NDVI(normalized difference vegetation index) of Golden Triangle energy in MSGN region was used to calculate the maximum vegetation coverage in oneyear of every pixel,and the variation between ten years was analyzed.Result showed that the FVC(fractional vegetation cover) in Golden Triangle area was increased generally from 2000 to 2009.The highest average value was 45.45% in 2008,and the lowest average value was 33.74% in 2000.The vegetation coverage was declined slightly in 2005 and 2009,and the main reasons were attributed to city expansion and regional resources development.