Effect of Grass Coverage on the Sediment Concentration in Overland Flow in the Hillslope-Gully Side Erosion System

Mian Li; Wen Yi Yao; Er Yang; Jiang Nan Chen; Wen Feng Ding

doi:10.4028/www.scientific.net/AMM.212-213.50

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 212-213Effect of Grass Coverage on the Sediment...

Effect of Grass Coverage on the Sediment Concentration in Overland Flow in the Hillslope-Gully Side Erosion System

Abstract:

By scouring experiments, the changeable process and characteristics of sediment concentration in sloping surface with different coverage degrees and spatial locations of grass were studied. Five grass coverage degrees of 0, 30%, 50%, 70%, 90%, three spatial locations of grass (upslope, mid-slope, low-slope) and two water inflow rates of 3.2L/min, 5.2L/min were applied to a 0.5 by 8 m soil bed in scouring experiments. Results showed that in the hillslope–gully side erosion system, the grass coverage has great effect on reducing the sediment concentration in the overland flow when the water inflow rate is small, but when the water inflow rate is large this kind of effect is very limited. When the grass located at the low-slope on the hillslope the sediment concentration is relatively smaller. The sediment concentration in the overland flow is gradually decreasing with the duration of scouring, and the effect of spatial locations of grass on the temporal variation of sediment concentration is very complicated because of gully erosion.

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Periodical:

Applied Mechanics and Materials (Volumes 212-213)

Pages:

50-54

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.212-213.50

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Online since:

October 2012

Authors:

Mian Li, Wen Yi Yao, Er Yang, Jiang Nan Chen, Wen Feng Ding

Keywords:

Grass Coverage, Overland Flow, Scouring Experiment, Sediment Concentration

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