[1]WEN Yongfu,Gaopeng,MU Xingmin,et al.Experimental Study on Runoff and Sediment Yield in Runoff Plot Under Field Simulated Rainfall Condition[J].Research of Soil and Water Conservation,2018,25(01):23-29.
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Experimental Study on Runoff and Sediment Yield in Runoff Plot Under Field Simulated Rainfall Condition
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
25
Number of periods:
2018 01
Page number:
23-29
Column:
Public date:
2018-02-28
- Title:
- Experimental Study on Runoff and Sediment Yield in Runoff Plot Under Field Simulated Rainfall Condition
- Keywords:
- artificial rainfall; runoff plot; runoff; sediment
- CLC:
- S157.4
- DOI:
- -
- Abstract:
- Rainfall and runoff are the main dynamic factors which cause soil erosion on the Loess Plateau. Research on processes of rainfall, runoff and sediment yield can serve as development of process-based mode of soil erosion, soil and water conservation, and ecology construction on the loess region. The rule of erosion sediment and runoff infiltration relation was studied under different site conditions using field simulated rainfall. The results show that the runoff time becomes shorter when the slope and rain intensity increase and the time of runoff occurrence in bare arable land is shorter than that of natural grassland in the rainfall process. The volume of runoff increases when the duration increases, besides, the greater slope and rainfall intensity are, the larger the value is. The sediment-carrying capacity of the runoff first steeply increased, and then decreased sharply, and finally stabilized. The greater the slope is, the greater the rainfall intensity is, and the more advanced peak appearance time is. The natural grassland plays an important role in stabilizing the soil because the sediment-carrying capacity is very tiny in the grassland. Establishing a regression relation between runoff and sediment shows that the sediment yield and runoff follows the quadratic polynomial function, which reveales the variation rule of runoff and sediment yield during rainfall process.
- References:
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1900-01-01