HYDRODYNAMIC MODEL OF FLOW IN A BUCKET WATER-INTAKE ON THE KAZYM RIVER IN BELOYARSK TOWN
The objective is the scientific justification of the optimal variant of flow to prevent getting sediment, sludge, litter into bucket water intake, ensuring uninterrupted operation of water intake heads under the conditions of intensive blooming of water area and protecting juvenile fish from death. Materials and Methods: to study the bucket water intake, a hydrodynamic model of the transit channel along the line of the inmost depths was developed. The research methodology is based on the use of hydrometeorological research data on changes in depths by six cross-sections. The hydraulic methods of calculating steady uniform flow to determine the flow velocity were used. The computer simulation in the Femlab program using the Laplace equation to study the distribution of depths in the bucket water intake was performed. The boundary conditions in the inlet and outlet sections of the bucket water intake were set. The planned two-dimensional and spatial three-dimensional models were considered. Results: a hydrodynamic model of the bucket water intake which is a plan of the currents, including the inlet and outlet sections and four intermediate sections inside the water intake was constructed in Beloyarsk town. The main hydraulic characteristics were obtained (cross sections wet areas, average depths in each section, average velocities). The flow rate for hydraulic calculations in the inlet section 1 - 1 at a water level z₁ = 15.31 m was Q₁ = 6.24 m³/s, and in the outlet section 6 - 6 Q₁ = 6.07 m³/s (taking into account the water supply to the water intake Qвз = 0.17 m³/s). Conclusions: at present the average vertical velocities in the inlet section are 0.105 m/s, and the average cross sections wet areas velocities are 0.057 m/s, which creates favorable conditions for the development of algae in summer. The arrangement of an in-depth transit channel allows to increase its flow rate to 10.2 m³/s with an increase in average vertical velocities by 2.0-2.5 times.