Abstract. In paper, researches of riverbed and hydraulic processes at the water intake from mountain rivers are observed. Classification of designs of the mountain water intake structures, based on continuity signs is offered. Perfecting of base designs of water intake structures of a mountain-foothill zone and means of their hydraulic automation is carried out. The technological, theoretical and experimental substantiation of parameters of basic elements of these designs with a glance of hydromorphometric characteristics of the mountain rivers is given. Complex hydraulic researches of kinematic characteristics and carrying ability of a two-phase stream on water intake structures are executed. Bases of a technique of engineering calculation of the offered designs of water intake structures and the recommendation of their designing and maintenance in various hydrological regimes are developed.
In given article the arrangement of fish protection on water intakes is observed. Fish protection device in the form of variable width visor, arranged on the crest of sediment protection threshold is offered. In the article the geometrical dimensions of the fish protection device are substantiated, the distribution of water flow along it is studied, the capacity and the impact of the device on specimens of young fish is determined. The experimental data and their analysis with the subsequent conclusions are given.
Based on the numerical simulation of the structure, a decrease in the frequency was revealed with an increase in the number of defective sections. A change in the deformed oscillation pattern at the corresponding frequencies is observed. The method clearly makes it possible to increase the hydraulic structures’ efficiency.
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