Effects of Biochar on Sediment Transport and Rill Erosion after Two Consecutive Years of Seasonal Freezing and Thawing
Abstract
:1. Introduction
2. Materials and Methods
2.1. Test Area Overview
2.2. Experimental Design
2.3. Test Procedure
2.4. Data Analysis
2.5. Data Analysis
3. Results
3.1. Effects of Biochar on Slope Runoff and Soil Erosion
3.2. Effect of Biochar on Sediment Concentration of Runoff
3.3. Effect of Biochar on Rill Erosion
3.4. Effect of Biochar on the Rate of Headward Erosion
3.5. Effect of Biochar on Hydraulic Parameters of Rill
3.6. Effect of Biochar on the Dynamic Mechanism of Rill Erosion
3.7. Correlation Analysis between Characteristic Parameters of Water and Sediment Processes and Rill Erosion in 2018 and 2019
4. Discussion
4.1. The Effect of Biochar and Freeze–Thaw on the Process of Slope Water and Sediment
4.2. Effect of Biochar on Rill Erosion Characteristics
4.3. Effects of Biochar on Hydraulic and Dynamic Parameters of Rill Erosion
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Biochar Content (kg m−2) | Slope (°) | |||
---|---|---|---|---|
1.8 | 3.6 | 5.4 | 7.2 | |
0 | P1 | P4 | P7 | P10 |
6 | P2 | P5 | P8 | P11 |
12 | P3 | P6 | P9 | P12 |
Slope (°) | Biochar (kg m−2) | Rill Headward Erosion Rate (cm min−1) | |||||
---|---|---|---|---|---|---|---|
2018 | 2019 | ||||||
Max | Min | Mean | Max | Min | Mean | ||
1.8 | 0 | 4.53 ± 1.87 a | 1.43 ± 0.65 a | 2.73 ± 0.45 a | 4.75 ± 1.52 a | 1.53 ± 0.78 a | 2.80 ± 0.33 a |
6 | 4.38 ± 1.33 a | 1.31 ± 0.73 a | 2.64 ± 0.34 a | 4.43 ± 0.82 a | 1.43 ± 0.43 a | 2.54 ± 0.71 a | |
12 | 4.11 ± 1.08 a | 1.27 ± 0.58 a | 2.58 ± 0.47 a | 3.87 ± 0.68 a | 1.27 ± 0.37 a | 2.42 ± 0.25 a | |
3.6 | 0 | 7.04 ± 1.41 a | 1.59 ± 0.64 a | 3.41 ± 0.23 a | 7.13 ± 1.57 a | 1.64 ± 0.51 a | 3.57 ± 1.01 a |
6 | 7.35 ± 1.57 a | 1.66 ± 0.61 a | 3.32 ± 0.36 a | 6.93 ± 2.48 a | 1.57 ± 0.78 a | 3.22 ± 0.74 a | |
12 | 7.44 ± 1.34 a | 1.73 ± 0.76 a | 3.18 ± 1.34 a | 6.88 ± 1.58 a | 1.33 ± 0.42 a | 3.17 ± 0.84 a | |
5.4 | 0 | 8.48 ± 1.58 a | 2.14 ± 0.52 a | 4.04 ± 0.86 a | 8.41 ± 1.47 a | 2.38 ± 0.45 a | 4.25 ± 1.42 a |
6 | 8.29 ± 1.92 a | 2.33 ± 0.49 a | 4.02 ± 0.52 a | 7.95 ± 2.62 a | 1.79 ± 0.39 a | 3.59 ± 0.77 b | |
12 | 8.18 ± 1.39 a | 2.61 ± 0.83 a | 3.81 ± 0.49 a | 7.56 ± 1.24 a | 1.43 ± 0.60 b | 3.54 ± 0.39 b | |
7.2 | 0 | 15.37 ± 2.21 a | 2.71 ± 0.59 a | 5.57 ± 0.92 a | 14.95 ± 3.44 a | 2.63 ± 0.45 a | 5.66 ± 1.72 a |
6 | 14.96 ± 1.92 a | 2.89 ± 0.62 a | 5.38 ± 1.43 a | 12.11 ± 2.34 a | 1.94 ± 0.57 b | 4.58 ± 2.52 b | |
12 | 14.78 ± 1.89 a | 3.06 ± 0.49 a | 4.82 ± 1.46 b | 10.58 ± 2.87 b | 1.73 ± 0.69 b | 4.09 ± 2.17 b |
Slope (°) | Biochar kg m−2 | 2018 | 2019 | ||||||
---|---|---|---|---|---|---|---|---|---|
(cm s−1) | (cm s−1) | ||||||||
1.8 | 0 | 11.5 ± 0.8 a | 553.4 ± 61.8 a | 0.33 ± 0.02 a | 1.2 ± 0.22 a | 11.6 ± 1.05 a | 548.1 ± 163.9 a | 0.42 ± 0.02 a | 1.1 ± 0.26 a |
6 | 10.7 ± 1.4 ab | 429.2 ± 85.0 b | 0.34 ± 0.02 a | 1.1 ± 0.32 a | 10.5 ± 1.22 ab | 404.2 ± 124.5 ab | 0.39 ± 0.01 a | 1.1 ± 0.34 a | |
12 | 10.1 ± 1.2 b | 359.6 ± 69.8 c | 0.34 ± 0.03 a | 1.1 ± 0.17 a | 9.2 ± 0.85 b | 303.0 ± 113.3 b | 0.35 ± 0.07 a | 1.3 ± 0.41 a | |
3.6 | 0 | 13.1 ± 1.6 a | 875.6 ± 133.5 a | 0.33 ± 0.04 a | 2.5 ± 0.36 a | 13.3 ± 0.50 a | 929.0 ± 98.8 a | 0.37 ± 0.03 a | 2.5 ± 0.38 a |
6 | 12.4 ± 1.3 a | 793.3 ± 137.8 b | 0.33 ± 0.03 a | 2.7 ± 0.29 a | 11.1 ± 1.13 b | 577.1 ± 84.9 b | 0.36 ± 0.04 a | 2.7 ± 0.41 a | |
12 | 11.1 ± 1.2 b | 586.1 ± 121.4 c | 0.32 ± 0.05 a | 2.8 ± 0.46 a | 10.2 ± 1.23 c | 491.9 ± 87.0 b | 0.33 ± 0.04 a | 3.0 ± 0.62 a | |
5.4 | 0 | 16.3 ± 0.8 a | 1474.9 ± 157.8 a | 0.37 ± 0.03 a | 3.3 ± 0.28 a | 16.3 ± 0.87 a | 1467.1 ± 215.9 a | 0.38 ± 0.03 a | 3.3 ± 0.42 a |
6 | 15.4 ± 0.9 b | 1341.2 ± 166.4 b | 0.34 ± 0.04 b | 3.5 ± 0.33 b | 14.9 ± 0.96 b | 1183.8 ± 235.2 a | 0.36 ± 0.05 a | 3.5 ± 0.45 a | |
12 | 14.5 ± 1.6 c | 1083.7 ± 151.0 c | 0.34 ± 0.03 b | 3.5 ± 0.76 ab | 13.1 ± 1.09 c | 1059.4 ± 194.1 a | 0.32 ± 0.05 a | 4.6 ± 1.01 a | |
7.2 | 0 | 20.6 ± 1.2 a | 2516.9 ± 132.5 a | 0.36 ± 0.04 a | 3.6 ± 0.37 a | 20.8 ± 1.02 a | 2482.5 ± 193.7 a | 0.38 ± 0.03 a | 3.6 ± 0.58 a |
6 | 19.0 ± 1.3 b | 2269.7 ± 191.8 ab | 0.31 ± 0.05 b | 4.3 ± 0.23 b | 16.6 ± 0.99 b | 1537.7 ± 370.7 b | 0.37 ± 0.04 a | 4.3 ± 0.43 a | |
12 | 18.6 ± 1.4 b | 2169.4 ± 252.4 b | 0.30 ± 0.03 b | 4.4 ± 0.27 b | 14.5 ± 1.05 c | 1359.5 ± 247.0 b | 0.31 ± 0.03 a | 5.7 ± 0.67 b |
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Li, T.; Yu, P.; Liu, D.; Fu, Q.; Hou, R.; Zhao, H.; Xu, S.; Zuo, Y.; Xue, P. Effects of Biochar on Sediment Transport and Rill Erosion after Two Consecutive Years of Seasonal Freezing and Thawing. Sustainability 2021, 13, 6984. https://doi.org/10.3390/su13136984
Li T, Yu P, Liu D, Fu Q, Hou R, Zhao H, Xu S, Zuo Y, Xue P. Effects of Biochar on Sediment Transport and Rill Erosion after Two Consecutive Years of Seasonal Freezing and Thawing. Sustainability. 2021; 13(13):6984. https://doi.org/10.3390/su13136984
Chicago/Turabian StyleLi, Tianxiao, Pengfei Yu, Dong Liu, Qiang Fu, Renjie Hou, Hang Zhao, Song Xu, Yutian Zuo, and Ping Xue. 2021. "Effects of Biochar on Sediment Transport and Rill Erosion after Two Consecutive Years of Seasonal Freezing and Thawing" Sustainability 13, no. 13: 6984. https://doi.org/10.3390/su13136984