The authors of the article, on the basis of laboratory experiments, describe the kinematic the structure of the erosion rates of the water flow in the conditions of non-cohesive soil lying in the peceidal canals. A methodology for conducting laboratory experiments and analysis of the results tov research. Dependencies are proposed for determining non-eroding water flow rates taking into account the occurrence of the slopes of the trapezoidal canal.

The article discusses the issue of determining non-erosion velocities for cohesive saline soil at the bottom and slopes of canals. Based on the formulas of Ts.E. Mirtskhulava for the determination of non-eroding velocities of water flow in cohesive soils, equations for determining non-eroding velocities for cohesive saline soil are proposed. A brief technique for conducting laboratory experiments and modeling of saline soil is presented. Based on the obtained data of laboratory experiments, the dependences for determining the non-eroding velocities of the water flow in the channels of the cohesive saline soils are obtained.

A comparison of the values obtained with the experimental data on noneroding velocity in the article shows that the soil erosion in the experiments took place much earlier because our experiments were carried out in trapezoidal channels, based on experiments in wide rectangular channels.