[1]JIANG Fang-shi,HUANG Yan-he,LIN Jin-shi,et al.Effects of Different Rainfall Intensities and Slope Gradients on Rill Erosion of Coluvial Deposits in Granite Benggang[J].Research of Soil and Water Conservation,2014,21(01):1-5.
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Effects of Different Rainfall Intensities and Slope Gradients on Rill Erosion of Coluvial Deposits in Granite Benggang
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
21
Number of periods:
2014 01
Page number:
1-5
Column:
Public date:
2014-02-28
- Title:
- Effects of Different Rainfall Intensities and Slope Gradients on Rill Erosion of Coluvial Deposits in Granite Benggang
- Keywords:
- Benggang; colluvial deposits; simulated rainfall; rill erosion
- CLC:
- S157.1;S124.2
- DOI:
- -
- Abstract:
- Benggang mainly consists of colluvial deposits with high erosivity leading to easy rainfall splash erosion or runoff scouring. This study aimed to analyze the rill erosion characteristics of the colluvial deposits under different simulated rainfall and slope conditions. Rainfall intensity ranged from 1.00 to 2.33 mm/min and slope gradient from 20° to 40°. The results indicated that: the time that the rill erosion happened was shorten as the slope and rainfall intensity increased; when the rainfall intensity increased, the distance of rill head from slope top became short, the width and depth increased, but rill density was not obviously different; when the slope increased, the vertical force increased, but the horizontal expansion capacity reduced accordingly, so the depth increased, and the width-depth ratio decreased; and when the slope and rainfall intensity increased, the main erosion pattern changed from sheet erosion to rill erosion; the effects of rainfall intensity on rill erosion was greater than slope gradient.
- References:
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1900-01-01