Published in Scientific Papers. Series A. Agronomy, Vol. LXII, Issue 1
Written by Olesea COJOCARU
The resistance to the breaking of soil samples is three orders of magnitude greater than the shear stresses at the bottom of the slope flows, which produce work for the separation and transport of soil particles. Mirtskhulava believed that the separation of soil particles by a stream occurs as a result of fatigue breaking of bonds between soil particles (Mirtskhulava, 1966). With this in mind, the resistance of the soil to the gap is reduced by two orders of magnitude. Nearing M.A. believed that the separation of soil particles occurs at the points of vortex breakdown from the bottom of the stream, where the shear stress is two orders of magnitude greater than its average value (Nearing, 1991). These approaches do not explain the overcoming of the adhesion force between soil particles by slope flows. The results of the study of the effect of water temperature on the erosion rate of model soil samples showed a strong dependence of erosion on water temperature, which is close to the Vant-Hoff's rule. It was experimentally shown that the destruction of bonds between particles soil in a sample of black earth mono-grained soil occurs under a layer of still water (Rose, 1985).
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