[1]ZHAO Gan,HUANG Yan-he,LIN Jin-shi,et al.Effect of Discharge and Slope Gradient on Colluvial Deposits Erosion in Benggang[J].Research of Soil and Water Conservation,2014,21(02):11-16.
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Effect of Discharge and Slope Gradient on Colluvial Deposits Erosion in Benggang
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
21
Number of periods:
2014 02
Page number:
11-16
Column:
Public date:
2014-04-28
- Title:
- Effect of Discharge and Slope Gradient on Colluvial Deposits Erosion in Benggang
- Keywords:
- Benggang; colluvial deposits; discharge; slope gradient; soil erosion
- CLC:
- S157.1
- DOI:
- -
- Abstract:
- The colluvial deposits is an important part of Benggang, which has the characteristics of loose texture, high content of coarse particle, large slope gradient and high erosivity. This study aimed to analyze the characteristics of the colluvial deposits under different simulated upslope runoff and slope gradient conditions. Upslope runoff ranged from 3.6 to 14.4 L/min and slope gradient varied from 20°to 40°. Sediment yield and sediment concentration were monitored. Results indicated that the processes of sediment yield in colluvial deposits could be divided into three stages: gradual increase, fluctuation and stablility; the changes of sediment concentration with time had smooth and multimodal types. Under the slope gradient(20°, 25° and 30°), the flow of colluvial deposits belonged to the low sediment flow, while it would be the high sediment flow under the slope gradient (35° and 40°). Upslope runoff has greater effect on sediment yield than slope gradient, while it has smaller influence on sediment concentration than slope gradient. Sediment yield and sediment concentration can be well predicted by using upslope runoff and slope gradient.
- References:
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1900-01-01