[1]YUAN Ying,ZHANG Hui.Effect of Initial Thawing Depth on Runoff and Sediment Yield on Loessial Soil Slope[J].Research of Soil and Water Conservation,2018,25(02):66-71.
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Effect of Initial Thawing Depth on Runoff and Sediment Yield on Loessial Soil Slope
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
25
Number of periods:
2018 02
Page number:
66-71
Column:
Public date:
2018-04-03
- Title:
- Effect of Initial Thawing Depth on Runoff and Sediment Yield on Loessial Soil Slope
- Keywords:
- soil erosion; initial thaw depth; rainfall intensity; loessial soil
- CLC:
- S157.1
- DOI:
- -
- Abstract:
- The initial thaw depth has the great impact on the soil erosion in spring thaw period. A rainfall simulation study was conducted to examine the effects of rainfall intensity and initial thaw depth on loessial soil erosion in the spring thaw period. The experimental treatments included three rainfall intensities (0.6,0.9,1.2 mm/min), four initial thaw depths (0,2,4,6 cm). The results showed that runoff increased by 2.79~3.63 times when rainfall intensity increased from 0.6 mm/min to 1.2 mm/min under different initial thaw depths. The runoff was roughly increasing, with the increasing of the initial thaw depth. Soil loss increased by 4.2 times when rainfall intensity increased from 0.6 mm/min to 1.2 mm/min under different initial thaw depths; the effects of initial thaw depth on soil erosion were complex, but when the initial thaw depth and rainfall intensity increased simultaneously, soil loss increased, which suggested that the rainfall intensity and initial thaw depth had the coupling effects on the erosion of the slope. Runoff had the strongest correlation with rainfall intensity. Soil loss had the strongest correlation with rainfall intensity, followed by coupling effects of rainfall intensity-initial thaw depth. According to these observed date, the empirical equations for predicting runoff and soil loss were also established. These findings may provide the supplement for understanding the erosion mechanisms.
- References:
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1900-01-01