Advances in Researches on Slope Gradient Factor in Soil Erosion

Slope gradient is the main factor affecting soil erosion.Researches on slope gradient can be divided into two categories: effects of slope gradient and critical slope degree on soil erosion intensity.Based on reviewing research history of slope gradient factor on soil erosion,the main achievements and the existing limitation on effects of slope gradient on soil erosion were presented,and directions of developing researches on effects of slope gradient on soil erosion was given.