Abstract:In order to study the effects of different soils on sediments particle transport on slopes of engineering accumulation, a field scouring experiment was carried out under two kinds of disturbed soil, red and aeolian sandy soil, four flow gradients 8, 12, 16 and 20 L/min, and under the condition of 32°. The results showed that:(1) The runoff and sediment yield of the two accumulation slopes showed a "multi-peak and multi-valley" change process with time. (2) Compared with the disturbed aeolian sandy soil accumulation, the rate of sediment yield on the slope of disturbed red soil accumulation increased slowly with the increasing discharge flow rates. When the discharge flow rate was 20 L/min, the gravity factor played a leading role in the slope erosion of aeolian sandy soil accumulation. (3) The cumulative sediment yield of the two engineering accumulations was significantly correlated with the cumulative runoff, which could be described by linear function (P<0.01, R2>0.99). (4) With the increase of discharge rates, the proportion of sediment particles transported on the slope of the accumulation was close to the original soil. The main erosion sediment particles of the aeolian sandy soil were sand grains (> 60%), the proportion of transportation of red soil particles was relatively uniform(the sediment transport contents ranged from 24% to 41% for each particle size). The difference in slope erosion of different accumulations was closely related to soil texture. These results could provide theoretical basis for the prevention and control measures for soil erosion on slopes of different soil types.