Hydraulic justification for the operation of the device for alluviation ofnarrow-profiledams

The construction of protective dams is the most effective means of combating flooding. There are various ways to build protective dams. The alluvial method of constructing protective dams can significantly reduce the cost of their construction. The article describes a method and device for alluvial narrow-profile dams that allows the use of bottom sediments as a building material. The method includes clearing the riverbed from bottom sediments with dredging operations, improving the flow capacity during floods. The work is carried out by a dredger and the developed soil in the form of pulp is delivered to the alluvial device. The alluvial device ensures the separation of large fractions of soil from the general flow of pulp and allows the formation of a narrow-profile dam with stable slopes and an anti-filtration core. The article offers hydraulic calculations that allow us to justify the design and technological parameters of the method and device for alluvial narrow-profile dams: the values of the flow rate and the average speed of the pulp movement in the distribution unit of the device are determined; the dimensions of the inlet opening of the bell are justified; the time of alluvium of one map is determined; the number of outlet openings in the distribution slurry pipelines is justified and their location is specified. Nomograms are constructed that allow us to determine the optimal modes of alluvial dams - the length of the pulp pipeline, the height of the pulp rise, and the time of filling the alluvial map.

flooding of territories, flood floods, alluvial narrow-profile dams, alluvial map, dredger, alluvial device, bell, protective grid, sickle-shaped element, pulp, bottom sediments and sediments, pulp pipeline, hydraulic calculations, nomograms, entrained sediments, suspended sediments, calculation of the pulp pipeline, pulp flow rate, average flow rate, head loss

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