Characteristics of Soil Erosion on Sloping Field in the Central Hilly Areas of Sichuan

The study was carried out to do research on the characteristics of soil erosion in sloping fields at the central hilly areas of Sichuan by observing the water and soil loss of runoff observation field.The results indicated that the runoff and soil erosion were different between different years.Runoff and soil erosion increased with the rise of slope.Multiple regression analysis showed that significant liner relationship existed between rainfall and runoff depth,soil erosion.However,the significant power and quadratic relationships were found between rainfall intensity and soil erosion,rainfall duration and soil erosion respectively.The principal component analysis manifested that rainfall and rainfall intensity were the major factors for soil erosion.The effect degree of rainfall duration on soil erosion was enhanced with the rise of slope.