Acta Geographica Sinica ›› 2019, Vol. 74 ›› Issue (5): 962-974.doi: 10.11821/dlxb201905010
• Climate Change and Surface Processes • Previous Articles Next Articles
CAO Xiaojuan1,5,XIE Linyu2,ZHANG Fengbao1,3(),YANG Mingyi1,3,LI Zhanbin4
Received:
2018-07-06
Revised:
2019-02-18
Online:
2019-05-25
Published:
2019-05-24
Contact:
ZHANG Fengbao
E-mail:fbzhang@nwsuaf.edu.cn
Supported by:
CAO Xiaojuan, XIE Linyu, ZHANG Fengbao, YANG Mingyi, LI Zhanbin. Quantifying the contributions of sand layer characteristic to variations of runoff and sediment yields from sand-covered loess slopes during simulated rainfall[J].Acta Geographica Sinica, 2019, 74(5): 962-974.
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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 |
Tab. 2
Significance and potential contributions of different factors to initial runoff time based on ANOVA
变量 | 来源 | 平方和 | 自由度 | 均方和 | F值 | 显著性 | 因子贡献率 |
---|---|---|---|---|---|---|---|
初始产流时间 | 沙层厚度 | 2226.6 | 2 | 1113.3 | 80.87 | 0*** | 68.03 |
粒径组成 | 179.53 | 4 | 44.9 | 3.26 | 0.041* | 3.85 | |
厚度×粒径 | 620.07 | 8 | 77.5 | 5.63 | 0.002** | 15.77 | |
误差 | 206.5 | 15 | 13.8 | 12.35 | |||
总计 | 3232.7 | 29 |
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 |
Tab. 4
Significance and potential contributions of different factors to total runoff for different rainfall durations
降雨历时(min) | 覆沙厚度(cm) | 粒径组成(%) | 交互作用 | 误差 | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Sig. | PF | Sig. | PF | Sig. | PF | PF | ||||
15 | 0.000*** | 46.62 | 0.001*** | 13.11 | 0.000*** | 26.22 | 14.05 | |||
30 | 0.000*** | 41.10 | 0.000*** | 27.87 | 0.001** | 18.28 | 12.75 | |||
45 | 0.000*** | 47.05 | 0.000*** | 24.57 | 0.001** | 16.63 | 11.74 | |||
60 | 0.000*** | 48.94 | 0.000*** | 24.27 | 0.006** | 13.12 | 13.68 | |||
75 | 0.000*** | 46.63 | 0.000*** | 21.94 | 0.008** | 14.63 | 16.80 | |||
90 | 0.000*** | 45.13 | 0.001** | 19.68 | 0.011* | 15.64 | 19.55 |
Tab. 5
Significance and potential contributions of different factors to cumulative sediment yield 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 | 0.001** | 29.19 | 0.061 | 10.26 | 0.038* | 20.52 | 40.03 | |||
15~30 | 0.000*** | 23.21 | 0.000*** | 30.06 | 0.000*** | 43.12 | 3.61 | |||
30~45 | 0.003** | 21.71 | 0.135 | 5.85 | 0.010* | 32.97 | 39.48 | |||
45~60 | 0.001** | 25.70 | 0.175 | 4.45 | 0.011* | 31.12 | 38.73 | |||
60~75 | 0.000*** | 54.60 | 0.016* | 11.01 | 0.053 | 10.52 | 23.87 | |||
75~90 | 0.000*** | 62.01 | 0.097 | 5.58 | 0.273 | 3.22 | 29.19 |
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 |
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