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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 m2/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 m2/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 m2/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 m2/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 m2/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。
In order to understand the influence of different width of scouring trough on the runoff and sediment production during erosion and erosion of slope surface, the disintegration body of collapse collapsible body was used as object, and different width of scouring trough (10, 20, 30, 40 and 50 cm) Flow (1.2 × 10-2,2.4 × 10-2,3.6 × 10-2,4.8 × 10-2m2 / min) combined with the indoor simulation test to study erosion of different width of the runoff sediment runoff influences. The results show that there is a significant difference in runoff rate and sediment yield between different widths of scouring grooves when the single-width flow rates are 1.2 × 10-2, 2.4 × 10-2 and 3.6 × 10-2 m2 / min ). When the single-wide flow rate is 4.8 × 10-2 m2 / min, there is no significant difference in runoff rate and sediment yield between different scouring tank widths. 2) The flow rate of single width is constant, and the runoff rate changes with time under different widths of scouring grooves. When the single width flow rate is 1.2 × 10-2m2 / min, the sediment yield and sediment concentration change with time under different width of scouring grooves The trends are different. The sediment yield and sediment concentration under the other single-wide flow have the same trend with time. 3) The same single-width flow rate, the cumulative runoff difference of different scouring groove width is not significant; single wide flow rate of 1.2 × 10-2,2.4 × 10-2,3.6 × 10-2m2 / min conditions, different scouring groove width Under the cumulative sediment yield and the average sediment concentration difference was significant (P <0.05). The study revealed the impact of the width of the scouring groove on sediment yield and sediment yield, and provided a reference for the future test of the width of the scouring groove.