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- W3115295004 abstract "<p>Although numerous studies have acknowledged that vegetation can reduce erosion, few process-based studies have examined how vegetation cover affect runoff hydraulics and erosion processes. We present field observations of overland flow hydraulics using rainfall simulations in a typical semi-arid area in China. Field plots (5 m &#215; 2 m) were constructed on a loess hillslope (25&#176;), including bare soil plot as control and three plots with planted forage species as treatments&#8212;Astragalus adsurgens (A. adsurgens), Medicago sativa (M. sativa) and Cosmos bipinnatus (C. bipinnatus). Both simulated rainfall and simulated rainfall + inflow were applied. Forages reduced soil loss by 55&#8211;85% and decreased overland flow rate by 12&#8211;37%. Forages significantly increased flow hydraulic resistance expressed by Darcy-Weisbach friction factor by 188&#8211;202% and expressed by Manning&#8217;s friction factor by 66&#8211;75%; and decreased overland flow velocity by 28&#8211;30%. The upslope inflow significantly increased overland flow velocity by 67% and stream power by 449%, resulting in increased sediment yield rate by 108%. Erosion rate exhibited a significant linear relationship with stream power. M. sativa exhibited the best in reducing soil loss which probably resulted from its role in reducing stream power. Forages on the downslope performed better at reducing sediment yield than upslope due to decreased rill formation and stream power. The findings contribute to an improved understanding of using vegetation to control water and soil loss and land degradation in semi-arid environments.</p>" @default.
- W3115295004 created "2021-01-05" @default.
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- W3115295004 date "2020-03-23" @default.
- W3115295004 modified "2023-09-25" @default.
- W3115295004 title "Overland runoff erosion dynamics on steep slopes with forages under field simulated rainfall and inflow" @default.
- W3115295004 doi "https://doi.org/10.5194/egusphere-egu2020-1694" @default.
- W3115295004 hasPublicationYear "2020" @default.
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