Abstract

Shaft spillways can also be referred a "morning glory" spillway . It's a hollow shaft or tower with a funnel at the top that is typically circular in shape. Situated in the reservoir close to the dam is the tower.Water pours over the edges of the reservoir and descends into the vertical shaft when the reservoir level rises above the top of the shaft spillway.At the base of the vertical shaft, it come on a tunnel. Usually, the tunnel passes beneath the dam, rerouting the water such that it joins the river downstream. The most significant disadvantage of these morning glory was the receiving hopper's "poor hydraulics" as a result of flow failure. In order to remove such disadvantage, a significant quantity of earthwork was required. The hazard of landslides and slope cutting resulted from the usage of water approaches to the receiving hoppers.

Description