Study on vertical Distribution of Soil Erosion on Loess slope

The vertical variability is one of basic components of soil erosion on loess slope.The experiments on a erosion plot have firstly revealed that the vertical distribution pattern of sediment yield have three types:the continued-increasing type,the increase-decreasing type and the wave type.We have primarily developed a method estimating ration of rill erosion according to redistribution of the rare earth element on loess slope.