Research on Desertification of Grassland in Prairie Coalmine Based on Remote Sensing Data ——Case study of Huolinhe Coalmine

The desertification of grassland from 1987 to 2003 in Huolinhe coalmine is studied. Factors inducing desertification of grassland in opencast coalmine are discussed. The information of grassland desertification is extracted by linear spectral mixture model while the direct destruction information inducing grassland desertification is extracted by decision-making tree and back-propagation neural network. The result shows that with the increase of coal output, the area of destruction and desertification of grassland keep enlarging year by year. The expanding of grassland desertification during the construction period of coalmine is more rapider than that during the production period. There is a positive correlation between the area of direct destruction and the area of desertification. So the area of direct destruction can be used as an important assessment and prediction indicator for grassland desertification around coalmines.