Correlation analysis between NDVI and environmental factors in Wuyi Mountain based on wavelet coherency

Using wavelet coherency analysis,this paper studies the relationships between normalized difference vegetation index( NDVI) and environmental factors at world heritage of Wuyi Mountain.This factors are elevation,slope,aspect,distance to the nearest resident,distance to the nearest road and distance to the nearest river in two transects based on data of TM remote sensing image,DEM,settlements,roads and rivers in 2009. The results show that the relationships between NDVI and environmental factors change as scale changes. At medium and large scale,NDVI is significantly correlated with elevation,aspect,slope. Thus elevation is the dominant controlling factors on the vegetation cover. There is positive correlation between NDVI and elevation below the altitude of 600 m,and above 600 m,the relationships between NDVI and elevation are positive in the windward side of the southeast monsoon and negative in the leeward side,but inversely above 1 200 m.