[1]Wei Yuchao,Chen Ziyu,Wang Ziyin,et al.A Study on the Sediment Source on Slope of Engineering Deposits by Rare Earth Element Tracer Method[J].Research of Soil and Water Conservation,2024,31(05):9-17.[doi:10.13869/j.cnki.rswc.2024.05.038]
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A Study on the Sediment Source on Slope of Engineering Deposits by Rare Earth Element Tracer Method
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
31
Number of periods:
2024 05
Page number:
9-17
Column:
Public date:
2024-08-10
- Title:
- A Study on the Sediment Source on Slope of Engineering Deposits by Rare Earth Element Tracer Method
- CLC:
- S157.1
- DOI:
- 10.13869/j.cnki.rswc.2024.05.038
- Abstract:
- [Objective]The aims of this study are to investigate the sediment sources of slope erosion in production and construction projects, and to implement the targeted soil and water conservation measures to mitigate soil and water loss caused by human disturbance. [Methods]Indoor simulated rainfall tests combined with REE tracer technique were conducted to examine the erosion characteristics and contributions from different areas of engineering deposits with varying gravel contents 〔0(pure soil), 10%, 20%, 30%〕 under the rainfall intensity of 90 mm/h. [Results](1)The amount of soil erosion of all areas of different gravel-containing engineering deposits was the largest in the down slope area, while the average erosion contribution of the down slope area(57.40%)was larger than that of the upper slope area and the middle slope area, which indicated that the down slope area was the main source of sediment.(2)The erosion contribution of the middle and down slope areas of the gravel-containing engineering deposits was significantly smaller than that of the pure soil deposits. The erosion contribution of the upper and middle slope areas of the gravel-containing engineering deposits was significantly greater than that of the pure soil deposits, and the erosion contribution of the down slope area of the gravel-containing engineering deposits was significantly less than that of the pure soil deposits.(3)The effect of gravel content on the amount and contribution of erosion at the down slope area was more significant(p<0.05). In the gravel-containing engineering deposits, the amount of erosion at the upper and down slope areas of the 20% gravel content engineering deposits was significantly greater than that of engineering deposits with 10% and 30% gravel contents. The contribution of erosion at the upper slope area of the engineering deposit with 10% gravel content was significantly greater than that engineering deposits with 20% and 30% gravel contents, and the contribution of erosion at the down slope area was significantly less than that engineering deposits with 20% and 30% gravel contents. [Conclusion]Among all the engineering deposits with gravel content, the erosion contribution rate of the down slope area is the largest, which indicates that the down slope area is the main source of sediment on the slope of the engineering deposits, and the protection and treatment of the down slope area should be strengthened.
- References:
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Last Update:
2024-08-10