中文摘要：

为了解不同宽度冲刷槽对坡面冲刷侵蚀过程中产流产沙的影响,该研究以崩岗崩积体为对象,通过不同冲刷槽宽度（10、20、30、40、50 cm）和不同单宽流量（1.2×10^（-2）、2.4×10^（-2）、3.6×10^（-2）、4.8×10^（-2） m^2/min）相结合的室内模拟冲刷试验,研究不同宽度冲刷槽对崩积体产流产沙的影响。结果表明：1）单宽流量为1.2×10^（-2）,2.4×10^（-2）,3.6×10^（-2） m^2/min时,不同冲刷槽宽度之间径流率、产沙率存在显著差异（P〈0.05）;单宽流量为4.8×10^（-2） m^2/min时,不同冲刷槽宽度之间径流率、产沙率差异不显著。2）单宽流量一定,不同冲刷槽宽度下径流率随时间变化趋势相同;单宽流量为1.2×10^（-2） m^2/min时,不同冲刷槽宽度条件下产沙率和含沙量随时间变化趋势不同,其他单宽流量下产沙率和含沙量随时间变化趋势相同。3）单宽流量相同,不同冲刷槽宽度下累积径流量差异不显著;单宽流量为1.2×10^（-2）,2.4×10^（-2）,3.6×10^（-2） m^2/min条件下,不同冲刷槽宽度下累积产沙量和平均含沙量差异显著（P〈0.05）。该研究揭示了冲刷槽宽度对崩积体产流产沙的影响,为今后试验冲刷槽宽度的选择提供参考。

英文摘要：

Collapsing hill is the typical and serious erosion phenomenon in the red soil area of southern China. The colluvial deposit erosion is the main sediment source of collapsing hill, which has the characteristics of loose texture, bad structure, and high erodibility. Study of the influence of elements on erosion sediment in the process of slope erosion is of great significance for revealing the mechanism of slope erosion. The width of scouring flumes is one of the factors that affect the characteristics of erosion and yield of runoff and sediment in the process of slope scouring erosion but now has fewer research achievements. With the colluvial deposits of collapsing hill as the research object, and through the simulated scouring in laboratory, this study intended to disclose the impacts of different width of scouring flumes（10, 20, 30, 40 and 50 cm） and discharge per unit width（1.2×10^-2, 2.4×10^-2, 3.6×10^-2 and 4.8×10^-2 m^2/min） on the slope scouring erosion and runoff and sediment yield of colluvial deposits. Soil samples were collected from the Longmen Town, Anxi County, Fujian Province in southeast China, and preprocessed according to the experimental standards. Results showed that： 1） The width of scouring flumes had significant effects on the runoff rate and sediment yield rate when the discharge per unit width was 1.2×10^-2, 2.4×10^-2 and 3.6×10^-2 m^2/min（P〈0.05）, while had no significant effects when the discharge per unit width was 4.8×10^-2 m^2/min; 2） When the discharge per unit width was 1.2×10^-2 m^2/min, the runoff rate increased gradually with the increase in time, when the discharge per unit width was 2.4×10^-2 and 3.6×10^-2 m^2/min, the runoff rate increased at first and then became stable with the increase in time, and when the discharge per unit width was 4.8×10^-2 m^2/min, the runoff rate increased at first and then decreased with the increase in time; when the discharge per unit width was 1.2×10^-2 m^2/min, the trends of sediment yield rate and sediment conc