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6 各因子对不同降雨历时总产沙量影响的显著性及贡献率

Tab. 6 Significance and potential contributions of different factors to total sediment yield for different rainfall durations

降雨历时(min) 沙层厚度(cm) 粒径组成(%) 交互作用 误差 Sig PF Sig PF Sig PF PF 15 0.001** 29.19 0.061 10.26 0.038* 20.52 40.03 30 0.000*** 23.14 0.000*** 32.99 0.000*** 39.94 3.93 45 0.000*** 30.31 0.000*** 22.30 0.000*** 34.88 12.51 60 0.007** 13.53 0.027* 11.96 0.002** 42.45 32.06 75 0.007** 17.08 0.280 2.30 0.006** 39.38 41.24 90 0.001** 29.92 0.459 -0.26 0.027* 26.08 44.26