中国农业大学学报2011，Vol.16Issue(4)：67-73,7.
黑麦草对黄土坡面降雨产流产沙过程的影响
Impacts of rye grasses on runoff and sedimentation processes from loess slopes
摘要
Abstract
The vegetative coverage on the slope,as an effective measure for soil and water conservation can regulate runoff and sedimentation.A series of flume experiments on the slopes set at 15°,under 4 rye grass coverages（0,25%,50%,75%）,were conducted under 3 rainfall intensities（60,90,120 mm/h） with silty-loamy（loess） soil,to study the impacts of the rye grass coverages on the runoff and sedimentation processes.The results showed that the rye grass significantly reduced sediment yields.Under saturation conditions,the runoff and sediment yield processes were linear functions of time.No significant differences of runoff yiled were found amongst different coverages of rye grass,but they increased with rainfall intensity.The sediment concentration,sediment yield and sediment delivery rate from the grassed slopes decreased with the grass coverage,and increased with the rainfall intensity.At the slopes without grass cover,there exited no significant differences of the sediment concentrations under different rainfall intensities,while sediment yield and sediement delivery rate increased with rainfall intensity.Understanding the impacts of the rye grass coverage on the runoff and sedimentation processes from loess slopes is important to the managements of water conservation.关键词
土壤侵蚀/降雨/产流/产沙/黑麦草/覆盖度/黄土坡面Key words
soil erosion/rainfall/runoff/sedimentation/rye grass/coverage/loess slopes分类
农业科技引用本文复制引用
董月群,李淑芹,原翠萍,雷廷武..黑麦草对黄土坡面降雨产流产沙过程的影响[J].中国农业大学学报,2011,16(4):67-73,7.基金项目
黄土高原水土流失数学模型（第1期)研发（黄水保[2007]19号) （）
黄土高原土壤侵蚀与旱地农业国家重点实验室基金（10501-245) （）
