Shaft spillways combined with a water intake

Abstract

1. Under confined conditions the combination of a spillway and intake in the same structure makes it possible to discharge floods during construction and operation of the hydrostation, to empty the reservoir, to create favorable conditions for its flushing, and also to withdraw water for consumers. 2. The combination of spillway and intake in one structure often reduces their total cost and provides an optimal and reliable layout of the hydrostation. 3. The use of an inclined shaft on a spillway provides a free-flow hydraulic regime on the structure, which in turn improves the hydraulic and static conditions of its operation, facilitates construction, and increases operational reliability. 4. Under certain conditions — presence of strong rocks in the lower pool, removal of the outlet part of the spillway to some distance from the dam — the flow in the lower pool should be joined with the river by means of a ski-jump bucket.