Soil erosion depends on a number of factors including rainfall intensity,
density of plant cover, and area cover. The objective of this study is to
investigate the impact of these factors on flow velocity, overland flow
regimes, sediment concentration, and absolute soil detachment. The soil used
in this study was sandy remolded agricultural soil. The soil is packed in a
tray of 1 m2 fixed on a slope of 3%; five different intensities were
simulated under different vegetation cover (density and area). The results
indicated that the overland flow velocity with vegetation cover was best
described by polynomial function. The mean flow velocity varied from 0.021
to 1.244 m/s. Overland flow regime is subcritical and laminar. However,
there are significant relationships between the vegetation cover density and
sediment concentration and absolute soil detachment. The sediment
concentration ranged from 1.38 to 5.65 kg/m3 whereas the absolute soil
detachment ranged from 0.021?10-3 to 1.244?10-3 kg/m2/s. Finally, the
vegetation cover presented a good protector to soil sediment from erosion.
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