The Research Progress of Impact of Interflow on the Nutrient Loss of Purple Soil Slope

The loss of nitrogen (N), phosphorus (P) is surface runoff and interflow is the main reason for causing non-point source pollution. The interflow can not only lead to soil erosion of slope, at the same time, it can also accelerate the eutrophication of surface water in the purple soil area. According to the existing research, we gave a conclusion about advances in interflow research and the influence factors of interflow, in the mean time, we also discussed the impact of interflow on purple hillslope nutrient loss and gave a prospection on the future research of the domain.