水土保持学报2017，Vol.31Issue(5)：40-44,5.DOI:10.13870/j.cnki.stbcxb.2017.05.007
不同雨强条件下坡度对红壤坡面侵蚀的影响
Effect of Slope Gradients on Red Soil Erosion Under Different Rainfall Intensity
摘要
Abstract
Slope gradient is an important factor affecting the surface slope erosion of red soil.The objectives of this study were to investigate the impact of slope gradients on runoff and sediment yield erosion processes.Three rainfall intensities (1.0,1.5,2.0 mm/min) and three slope angles (10°,15°,20°) were comparatively studied under simulated rainfall.Results showed that:(1) Under the same rainfall intensity,the time of the initial runoff were shortened with the increasing slope gradients on red soil,slope angle and runoff volume were positively correlated;under the same slope gradient,both the time of initial runoff and runoff volume decreased with the increasing rainfall intensity.(2) The effects of slope gradients on the sediment yieldwere more complicated,an increasing slope gradient generally increased the average sediment yield,which had greater volatility under 15°.(3) The contribution of slope gradients to runoff volume was more than 60％,and to sediment yield was above 30％.These findings provided theoretical basis for erosion prediction and prevention in erosion area of red soil.关键词
红壤/坡度/坡面产沙/模拟降雨/坡面产流Key words
red soil/slope erosion/simulated rainfall/slope runoff分类
农业科技引用本文复制引用
王丽园,查轩,黄少燕,陈世发,戴金梅,刘川..不同雨强条件下坡度对红壤坡面侵蚀的影响[J].水土保持学报,2017,31(5):40-44,5.基金项目
国家重点研发计划“南方红壤低山丘陵区水土流失综合治理”(2017YFC05054) （2017YFC05054）
