Soil Erosion Environmental Analysis of the Three Gorges Reservoir AreaBased on the “3S” Technology

Soil erosion process, which is affected by both natural and artificial factors,is extremely complicated. This article selects SPOT5 remote sensing image, rainfall, DEM and soil data and other related material in the three gorges reservoir area in 1992 and the 2002, extracts soil erosion every environment factor information by using 3S technology, and makes stastical analyzation of the soil erosion of three gorges reservoir area, namely environmental topography, climate, soil, vegetation and land use; by combining the changing trend of the various factors with soil erosion intensity change in the three gorges reservoir area, obtains the correlation between various environmental factors and soil erosion in the three gorges reservoir area,and puts forward soil erosion control strategy in the three gorges reservoir area in the light of current condition of soil erosion, thus providing aided decision-making and support.for management department.