Remote sensing monitoring for vegetation change in mining area based on SPOT-VGT NDVI

The environment and vegetation cover in mining area are influenced by the exploitation and utilization of mineral resources. It needs dynamic monitoring and estimation by the help of satellite remote sensing technology. Taking SPOT-VGT NDVI as information source and considering the characteristics of mining areas in China, this paper researched how to monitor the vegetation variation and desertification in mining area. The method includes the composition of time series data, the vegetation variation analysis and the gradation of desertification land. Concretely, the variation of NDVI is divided into 7 levels according to the slope of the fitted line by using NDVI time series data. Besides, the desertification land is divided into 5 levels according to the vegetation coverage, which is transformed from NDVI. The presented method was validated in Ningdong coal mining area, northwest China, and the results showed that the method is valid and effective.