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3 各因子对不同降雨时段15 min产流量影响的显著性及贡献率

Tab. 3 Significance and potential contributions of different factors to cumulative runoff of 15-min sub-rainfall during the rainfall

时间段(min) 沙层厚度(cm) 粒径组成(%) 交互作用 误差 Sig PF Sig PF Sig PF PF 0~15 0.000*** 46.62 0.001*** 13.11 0.000*** 26.22 14.05 16~30 0.000*** 35.28 0.000*** 27.62 0.000*** 24.86 12.25 30~45 0.000*** 52.22 0.000*** 17.69 0.001** 18.24 11.85 46~60 0.000*** 40.40 0.006** 16.65 0.025* 16.29 26.66 60~75 0.002** 23.89 0.068 10.03 0.028* 24.38 41.70 76~90 0.002** 28.01 0.106 7.88 0.048* 20.22 43.89