MODELING OF FLOOD ROUTING THROUGH WATER RESERVOIR DAM WITH STEPPED SPILLWAY

摘要

1. The physical model has allowed confirm the coefficients of consumption (m) in the mathematical model for conditions of high levels in the water reservoir; 2. The obtained hydrograph of draft discharges will allow confirm conditions of velocities and aeration in the lower reach of water reservoir; 3. In modern hydraulic engineering construction of many countries increasingly, disseminating receive the concrete spillway dam with step grassroots drain face. For example, in China at present has already built several tens of waterworks facilities, outlet works which are designed; 4. A new trend for construction of spillway is modernization of structures bulls, arranged on the crests of the latter for control of gates. The essence of this modernization is the expansion unit aft these bulls, mating with toe-ledge. This allows you to: modify the overall picture of current flow in the zone bull; to convert the stream of a two-dimensional to three-dimensional; to sharply intensify the processes of aeration and clearing excess energy flow; reduce the risk of cavitation in areas of hard concrete surfaces bulls and drain grassroots face; 5. Typical parameters of the discharges of the twelve river waterworks China, built and commissioned in recent years, as well as having stepped grassroots drain face.