Study on Dynamics of Vegetation in Huangfuchuan Watershed

Classified TM images of the research area in different time (1987 and 1996) by supervised classification, we obtain the spatial distribution and dynamic change of the vegetation. In Huangfuchuan watershed, the dominant vegetation is shrub and steppe, amount to 27.40% and 23.88% of the total watershed area with woodland being a little distribution, 4.24% in 1996. Compared the vegetation condition in Huangfuchuan watershed in different time, area of draft sandy land has decreased distinctly, and the area of shrub and woodland has increased, so condition of the vegetation has improved. Effect of comprehensive management on the conservation of water and soil is very remarkable.