This article discusses some theoretical assumptions about the causes and factors affecting the siltation (deposits) of channels of reclamation systems. It has been established that the siltation of channels is mainly caused by low speeds of the water moving in them and it occurs due to the destruction of slopes and accumulation of soil deposits at the bottom of the channel. An important role in the siltation of channels is played by the physical and mechanical properties of the soil. The intensity of the siltation of channels in the early years of their construction mainly occurs due to the peeling of the slopes of the soil. In irrigation canals, the intensity of siltation depends on the amount of sediment in the source of irrigation, which is meltwater from the slopes of the mountains bringing a huge amount of sediment. Sludges of intra-systemic origin are mainly obtained as a result of erosion and landslides of canal banks. During the exploitation of the drainage network, repair and restoration work is mandatory, as there is a change in the cross-section of the channels, which leads to a decrease in their parameters. An analysis of a theoretical study of the siltation of channels of reclamation systems using long-term materials from previous studies is carried out.

This article presents the theoretical background for the justification of the parameters of the rotating sprayer. Theoretical studies show that an increase in the rotation frequency of the disk at a constant air flow velocity leads to a minimum median mass diameter of the droplets. Therefore, when justifying the diameter of the sprayed droplets, it is necessary to consider the combination of the disk rotation speed and the axial velocity of the air flow. To obtain high-quality air-droplet flow, the initial speed of the main droplets discharged from the periphery of the spray disc should be less than the air velocity and rotational frequency Pavlovskyi spray is recommended to be applied with in ω=60… 200 c1.