Sediment and yield runoff with simulated rainfall on a barren slope

To assess sediment and yield runoff on a barren slope in the Qingshan Catchment of Lin'an City,Zhejiang Province,a field,simulated rainfall experiment was carried out using five rainfall intensities(1.66,1.57,1.51,0.97,0.65 mm·min-1).Results showed that with an increase of rainfall intensity and a decrease in runoff time,runoff,ratio of sediment yield and sediment yield increased.When rainfall intensity was 1.66 mm·min-1,the runoff time was 47 seconds,and after 30 minutes,runoff reached 0.898 m3 with a soil erosion modulus of 30 t·km-2.As a logarithmic function,rainfall intensity was negatively correlated with runoff time(r =-0.965 5,P0.01),while it increased with the exponential of the runoff correlation(r = 0.921 8,P0.01)and soil erosion modulus(r = 0.963 5,P0.01).Also,with runoff as a power function,the correlation was r = 0.873 6(P0.01).