In reservoirs, there are structures that used to support the operational such as spillway, gates, embankment and pumping system. In this post, I would like to explain about spillway structure. Spillway is a structure that used to divert the flow during extreme events. When flood occurs, the water level will rise higher than normal time. This must be anticipated by providing a spillway structure. The spillway structure will bring all the overflow water to the downstream area. Besides to protect the embankment from flood flow, the spillway will also minimise the flooding at the downstream area.
One of types of spillway is Ogee spillway. The shape just likes triangle. It was designed as certain flood level. If flood level higher than crest level of the spillway, it start overspill. The example of oree spillway is shown in figure below.
