The article gives the main results of the study of the dynamics of wear of the working bodies of irrigation pumps, gives the main recommendations as a result of the study of pumping units in the presence of cavitation. The authors consider the cavitation coefficient as the minimum value of this expression, at which the beginning of cavitation is detected. The process of unsteady cavitation is accompanied by many significant effects in which the water flow becomes two-phase, with a corresponding change in its properties, which affects the pump's efficiency. The effect of particle size on the erosion rate is predominant only up to a certain size limit, i.e., 600-800 microns on the blades. After that, the erosion rate increases with a comparatively slower rate. This indicates that the particle size affects the erosion rate only up to a certain particle size.

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Indirect signs of interpretation are natural, anthropogenic and natural-anthropogenic. They allow, on the basis of regular relationships between natural objects and objects of human activity, to recognize objects and their properties that are not depicted on an aerial photograph. Natural determine the relationship and interdependence of objects and phenomena in nature (landscape). For example, the dependence of the type of vegetation cover on the type of soil, its salinity and moisture, or the relationship of the relief with the geological structure of the area and their joint role in the soil formation process.