We research the effect of rainfall intensity and gradient on runoff erosion sediment from slopes of different types of soils（ red soil,purple soil,black soil and yellow soil）,and the correlation between slope runoff and erosion sediment. The result suggests that the average sediment yield from the slopes of four types of soils increases with the increase of railfall intensity and gradient. Judging from the erosion sediment of slope,the purple soil is the least eroded,followed by red sol,black soil and yellow soil. Through two-way variance analysis of average erosion sediment intensity from slopes based on artificial rainfall simuation experiment,we obtain P value of 0. 05 after calculation,which indicates the rainfall intensity and gradient have obvious influence on erosion sediment yield intensity. After analyzing the relation between erosion sediment from the slope of four types of soils and runoff,we come to the conclusion that the sediment yield intensity increases with the increase of runoff intensity,and that there is a good power function relation between them.
Journal of Nanchang Institute of Technology