The aim of this study was to establish the structural and hydraulic parameters of improved bilateral water dividers for irrigation canals with turbulent flow. To achieve this goal the description of new designs of turbulent flow water dividers and their operating principles are presented. The experimental methods for hydraulic studies on physical models followed by further processing of experimental results by mathematical statistics methods are implemented. It has been found out that the carrying capacity of the bilateral water divider for canals with turbulent flow is 6.4–8.1 % more than its prototype due to asymmetric arrangement of a divider fracture angle. Discharge coefficient of a newly designed water divider has a value 0.335–0.45, the average value for practical purposes is recommended to be set to 0.4. It has been found out that water divider for canals with turbulent flow has water discharge and stabilizing capacity at relatively open gates à/àmax < 0.4 and the relative water discharge in the supply canal Q/Qmax > 0.4. This water divider provides sufficient velocity distribution at the lateral gate outlet, which eliminates the flow failure in diversion canals and bed degradation. Another proposed bilateral water divider with the asymmetric grid (grid plate) is a simplified design of water distribution facilities of turbulent flow water dividers. The technique of hydraulic calculation of bilateral water divider with an asymmetrical grid partly incorporates the elements of the previous design calculation. Search modeling studies have confirmed the efficiency of water divider with an asymmetrical grid (grid plates).
Keywords: construction, chute-channel, turbulent flow, bilateral water divider, asymmetric grid, hydraulic research, discharge and stabilizing capacity.
