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This article proposes a method of assessing the type and parameters of the distribution of the initial moisture content of the foam-polymer-mineral (PPM) insulation of steel pipes of underground heat pipes, as well as a method of testing the statistical hypothesis about the type and parameters of the distribution of moisture content. Investigated the possibility of reducing the amount of testing of PPM insulation steel pipe on the subject of the original moisture content without reducing the accuracy and reliability of the estimation of the true values of the original moisture content.

The article considers the problem of calculating the vertical effective pressure drops of artificial rain on soil and hard surfaces. It is noted that the problem of determining the effective vertical pressure p of rain drops on soil although it is difficult, however, has a solution using Newton’s laws. This issue V.V. Slastenin, G. and A.P. Isaev, V.M. Moskovkin and V.F. gahs, etc., and N scientists. Erowyn S. , M.B. Lebedev, V.I., Gorodnichev, etc. proposed different approaches for determining the pressure p in terms of land reclamation (artificial irrigation). These issues dealt with and foreign researchers. Selected according to, according to the authors, the most suitable for the study of impact of the drops of artificial rain with the help of the patented device, and also to compare the obtained results with those of researchers dealing with the drip of erosion and determining the impact performance characteristics of droplets on a solid surface.

One of the main tasks in mechanized surface irrigation is to ensure the uniformity of distribution of irrigation norms along the length of the furrow, reducing the limit of discharges and reducing water losses to deep spillage. The magnitude of the technical elements of furrow irrigation is prescribed on the basis of permeability of soils, slope of the field surface, the value of irrigation norms to create the moisture reserves in the calculation of the soil, determining the development of the main mass of the root system of plants and technologies of their cultivation. Discusses various approaches to substantiation of rational elements of the technology of surface irrigation. Most appropriate to address the issue of rational justification of the elements of the technology of surface irrigation are the balance equations. Examples of balance equations based on the theory of infiltration absorption, developed by A.N. Kostyakova. Offered as possible solutions to the form of balance equations of water movement in a furrow and absorption of irrigation norms. It is expected that the dependence will simplify the approach to the assignment of rational parameters of elements of the mechanized watersaving furrow irrigation technology for specific production and economic conditions for ensuring the uniformity of soil moisture along the length of irrigation furrows not less 0.7...0.8 and justify the requirements to the technical means of irrigation.