In order to study the influence of different runoff path regulation measures on the erosion characteristics of yellow soil slope in the east of Sichuan Province

three kinds of bare slope (25°

30° and 35°

respectively) with sparse diamond grid (R1)

dense diamond grid (R2) and contrast (R0) were set up. Based on the simulated rainstorm experiment

the erosion process and characteristics of slope surface under three rainfall intensities (60

90 and 120 mm/h) were compared and analyzed. The results showed that: (1) On the slopes with the same gradient

under the rainfall intensities of 60 mm/h and 90 mm/h

the initial runoff production time followed the order of R0 < R1 < R2

when the rainfall intensity increased to 120 mm/h

the initial runoff production time was R0 < R2 < R1. (2) The runoff increased rapidly at first and then tended to be stable during the process of runoff production

the sediment yield rate decreased with the increasing of runoff time. (3) When the slope gradient was small (25°) or the rainfall intensity was small (60 mm/h)

the average runoff and sediment yield rates followed the order of R0 > R1 > R2. When the slope gradient increased to 35 ° and the rainfall intensity increased to 120 mm/h

the runoff and sediment yield rates of R1 and R2 gradually approached or even slightly exceed that of R0 slope. (4) Corresponding to the process of runoff and sediment yield

under the different slope and rainfall intensity combinations

the benefit of sediment reduction was generally greater than that of runoff reduction on R1 and R2 slope

and the relationship between cumulative sediment yield and cumulative runoff could be expressed in power function. The results could provide reference for revealing the slope erosion process in the yellow soil area of East Sichuan

and provide scientific basis for the control of soil and water loss in this area.