沙层特性对沙盖黄土坡面产流产沙变化贡献的定量分析

曹晓娟,谢林妤,张风宝,杨明义,李占斌

Quantifying the contributions of sand layer characteristic to variations of runoff and sediment yields from sand-covered loess slopes during simulated rainfall

CAO Xiaojuan,XIE Linyu,ZHANG Fengbao,YANG Mingyi,LI Zhanbin

表1 供试土壤及沙粒颗粒组成

Tab. 1 Particle size distribution of the soil and sand used in this study

材料类型 粒径组成(%) 几何平均粒径(mm) 砂粒(mm) 粉粒(mm) (0.05~0.002) 粘粒(mm) (<0.002) 2~0.25 0.25~0.05 黄土 23.21±2.09 66.63±2.55 10.06±0.47 0.064 沙 75.32±3.06 19.56±2.17 3.73±1.70 1±0.88 0.703 沙层粒径 组成水平 1 0.00 80.52 15.36 4.12 0.181 2 25.00 60.40 11.52 3.08 0.286 3 50.00 40.26 7.68 2.06 0.451 4 75.32 19.56 3.73 1.39 0.703 5 100.00 0.00 0.00 0.00 1.125