Laboratory Investigations Of Lower-pool Hydraulics During Operation Of The Service Spillway At The Bureya Hpp

摘要

The performance of the lower pool during operation of a spillway is discussed.rnThe spillway dam of the Bureya hydroproject (Fig. 1) consists of eight spans each 12 m wide, which are situated at the head of the spillway with bulkheads each 3 m thick, is designed for the passage of flows in conjunction with the HPP: Q_(0.1%)= 10,400 + 2100= 12,500 m~3/sec, and Q_(0.01%) = = 11,200 + 2100 = 13,300 m~3/sec with a pool differential of 117 m. The pools are merged by a discharge of flow from the dam over a distance of 200 m in a diversion channel beyond a 140-m-wide spillway where the overall width of the river is 250 m, and the average depth 15 m in the case of maximum-flow passage.