Spectrum Characteristic of Vegetation Coverage Change Based on NDVI in the Three-North Shelter Forest Program
SHEN Lina
SUN Yanling
YANG Yanli
JING Yue
Abstract：Based on the GIMMS NDVI3g data of 1985,1995,2000,2010 and using the dimidiate pixel model to calculate the vegetation coverage,spatial-temporal characteristic of vegetation coverage change was analyzed by the spectrum analysis in the Three-North Shelter Forest Program.The results showed that,for differences of the spectrum space,the change of vegetation coverage occurred mainly in the northeast of Inner Mongolia,in the northwest of Xinjiang,the Shaanxi-GansuNingxia border region,and the trend of vegetation coverage change was from scattered to be centralized in area of the project.For variations of spectrum quantity,the area of the vegetation coverage change increased after the first decreased,showing a rising trend in general.For the mode of spectrum change,the stabilization,recent conversion and smooth transition were primary,and the biggest changing spectrum unit was mostly the types that vegetation coverage level had turned good,presenting the trend of steady growth,especially from 2000 to 2010.Research results could timely and accurately reflect vegetation change,which will provide a scientific basis for further construction of the Three-North Shelter Forest Program.
Keywords：Three-North Shelter Forest ProgramNDVIvegetation coveragespectrum analysis
Publication Date：2017-01-01
Pages：9( 70-77,106 )