Determination of the hydrophysical parameters of soil in an erosion model

The rates of the soil loss were studied in a wide range of flow velocities from 0.41 to 1.64 m/s. The results confirmed the main implications of the hydrophysical model: (1) the rate of the soil loss in the region of flow velocities exceeding the threshold value by 1.2–1.5 times and more is proportional to the cubic flow velocity; (2) the detachment of particles in the pre-threshold region is probable in nature, and the relationship between the soil loss and flow velocity is S-shaped. On this basis, a procedure was developed for the experimental determination of the soil erosion parameters: the erodibility, the threshold flow velocity, and the coefficient characterizing the variance of the particles’ resistance to detachment.