坡面草被覆盖对坡沟侵蚀产沙过程的影响

• Published in: 地理学报（英文版） Vol. 19; no. 3; pp. 321 - 330
• Main Authors: 李勉, 姚文艺, 丁文峰, 杨剑锋, 陈江南
• Format: Journal Article
• Language: Chinese
• Published: 2009
• Subjects: hillslope-gully side erosion system; sediment yield; grass coverage; scouring experiment
• ISSN: 1009-637X
• DOI: 10.1007/s11442-009-0321-z

P4; By scouring experiments, the changeable process and characteristics of sediment yield in the hillslope-gully side erosion system with different coverage degrees and spatial locations of grass were studied. Five grass coverage degrees of 0, 30%, 50%, 70%, 90%, three spatial locations of grass (upslope, mid-slope, low-slope) and two water inflow rates of 3.2 L/min, 5.2 L/min were applied to a 0.5 by 7 m soil bed in scouring experiments. Results showed that the sediment yield decreased with the increase of grass coverage degree at 3.2 L/min water inflow rate in scouring experiments and the sediment yield with different grass locations on the sloping surface was in the order of upper > middle > lower. At 5.2 L/min water inflow rate, the differences of sediment yield among various grass coverage degrees were increased, whereas the changeable tendency of sediment yield with different grass locations on the whole sloping surface was not very obvious. The proportion of sediment yield from the gully side increased