采用室外人工径流冲刷模拟装置,在5 L/min冲刷流量条件下,对15°、20°、25°三种坡度的裸坡、30%~40%及70%~80%草被覆盖度情况下黄土坡面的产沙量、侵蚀率、径流含沙量进行了试验研究,结果表明:草被覆盖度变化对黄土坡面产沙量、侵蚀率和径流含沙量有着显著影响,覆盖度70%~80%的黄土坡面的产沙量不足裸坡产沙量的10%;相同坡度和冲刷流量条件下,黄土坡面侵蚀率与产沙量变化基本一致;草被对增强黄土坡面土壤抗蚀能力、减少侵蚀具有显著作用。 The outdoor artificial runoff scouring simulator was used to measure the coverage of grass covered by 15 °, 20 ° and 25 ° bare slopes, 30% -40% and 70% ~ 80% under 5 L / min flushing flow rate The results show that the change of grass cover has a significant effect on the sediment yield, erosion rate and runoff sediment concentration on the loess slope, and the coverage The sediment yield of loess slope from 70% to 80% is less than 10% of the sediment yield from bare slope. Under the same slope and flushing flow rate, the change of erosion rate and sediment yield of loess slope are basically the same; Surface soil corrosion resistance, reduce erosion has a significant role.