When studying the problems of water filtration to a single horizontal imperfect drain of finite length, in a system of interacting horizontal imperfect drains, it is necessary to consider spatial (three-dimensional) filtration problems. Unlike flat (two-dimensional) problems, spatial filtering has been studied in less detail, since it is difficult to obtain rigorous solutions to their problems.

Keywords: water supply facilities, filtration, equipotentials, drainage, borehole, pressure reservoir, drain, pressure, inflow, reservoir, watercourse

During the construction of water treatment stations in group water pipelines, it exceeds 15 ... 30% of the cost of the entire system and directly depends on the technological scheme, the choice of which, in turn, is influenced by the quality of the water in the source and the performance of the station. In large group water supply systems, water from surface sources is usually used, which must be clarified, discolored, deodorized, and disinfected.

Keywords: plumbing, reagent, turbidity, filtration flow, reliability, non-failure operation, sediment, technological schemes, investments, filter

Determination of the main hydraulic parameters of overgrown channel beds using the methods of various authors Shezi, Altshul, etc., in relation to the conditions of irrigation systems of the Kabardino-Balkarian Republic. A plot of the velocity distribution in conditions of overgrown riverbeds is constructed. The distribution of velocities in overgrown riverbeds strongly depends on the flexibility of the stems.

Keywords: speed, resistance, flexibility, irrigation, channel

It was considered the method of calculating the stability of steel spiral-bound silo wall under axisymmetric buckling under the influence of internal grain pressure is considered. The silo construction consists of short, cylindrical shells smoothed through the folds and having initial curvatures directed inwards. It was obtained the solution for determining the critical stresses of short shells.

Keywords: steel silo, spiral-bound silo wall, ax symmetric buckling, initial curvature of the shell, internal lateral pressure, elastic repelling of grain, frictional force of grain

It was considered the method of calculating the stability of steel spiral-bound silo wall under axisymmetric buckling under the influence of internal grain pressure is considered. The silo construction consists of short, cylindrical shells smoothed through the folds and having initial curvatures directed outwards. It was obtained the solution for determining the critical stresses of short shells.

Keywords: steel silo, spiral-bound silo wall, ax symmetric buckling, initial curvature of the shell, internal lateral pressure, elastic repelling of grain, frictional force of grain